Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2018	Oct. 31, 2018
Entity Registrant Name	REGENCY CENTERS CORP
Entity Central Index Key	0000910606
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		169,443,126
Partnership Interest [Member]
Entity Registrant Name	REGENCY CENTERS LP
Entity Central Index Key	0001066247
Entity Filer Category	Accelerated Filer

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Real estate investments at cost:
Notes receivable	$ 0	$ 15,803
Parent Company [Member]
Real estate investments at cost:
Property, Plant and Equipment, Gross	10,854,283	10,578,430
Properties in development	36,707	314,391
Gross real estate investments at cost	10,890,990	10,892,821
Less: accumulated depreciation	1,474,769	1,339,771
Total Cost Net of Accumulated Depreciation	9,416,221	9,553,050
Investments in real estate partnerships	458,051	386,304
Net real estate investments	9,874,272	9,939,354
Real Estate Held-for-sale	51,892	0
Cash and cash equivalents	40,365	45,370
Restricted cash	4,121	4,011
Tenant and other receivables, net of uncollectible reserves of $14,332 and $12,728 at September 30, 2018 and December 31, 2017, respectively	160,709	170,985
Deferred Costs, Leasing, Net	85,292	80,044
Acquired lease intangible assets, less accumulated amortization of $206,378 and $148,280 at September 30, 2018 and December 31, 2017, respectively	412,653	478,826
Other assets	427,726	427,127
Total assets	11,057,030	11,145,717
Liabilities:
Notes payable	3,008,592	2,971,715
Unsecured credit facilities	708,616	623,262
Accounts payable and other liabilities	236,250	234,272
Acquired lease intangible liabilities, less accumulated amortization of $84,435 and $56,550 at September 30, 2018 and December 31, 2017, respectively	507,341	537,401
Tenants’ security, escrow deposits and prepaid rent	43,988	46,013
Total liabilities	4,504,787	4,412,663
Commitments and contingencies	0	0
Stockholders’ equity/Partners' capital:
Common stock, $0.01 par value per share, 220,000,000 shares authorized; 169,441,714 and 171,364,908 shares issued at September 30, 2018 and December 31, 2017, respectively	1,694	1,714
Treasury stock at cost, 385,652 and 366,628 shares held at September 30, 2018 and December 31, 2017, respectively	(19,550)	(18,307)
Additional paid in capital	7,756,215	7,873,104
Accumulated other comprehensive income (loss)	14,066	(6,289)
Distributions in excess of net income	(1,240,331)	(1,158,170)
Total stockholders’ equity	6,512,094	6,692,052
Noncontrolling interests:
Exchangeable operating partnership units, aggregate redemption value of $22,628 and $24,206 at September 30, 2018 and December 31, 2017, respectively	10,726	10,907
Limited partners’ interests in consolidated partnerships	29,423	30,095
Stockholders' Equity Attributable to Noncontrolling Interest	40,149	41,002
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(6,552,243)	(6,733,054)
Total liabilities and equity	11,057,030	11,145,717
Partnership Interest [Member]
Real estate investments at cost:
Property, Plant and Equipment, Gross	10,854,283	10,578,430
Properties in development	36,707	314,391
Gross real estate investments at cost	10,890,990	10,892,821
Less: accumulated depreciation	1,474,769	1,339,771
Total Cost Net of Accumulated Depreciation	9,416,221	9,553,050
Investments in real estate partnerships	458,051	386,304
Net real estate investments	9,874,272	9,939,354
Real Estate Held-for-sale	51,892	0
Cash and cash equivalents	40,365	45,370
Restricted cash	4,121	4,011
Tenant and other receivables, net of uncollectible reserves of $14,332 and $12,728 at September 30, 2018 and December 31, 2017, respectively	160,709	170,985
Deferred Costs, Leasing, Net	85,292	80,044
Acquired lease intangible assets, less accumulated amortization of $206,378 and $148,280 at September 30, 2018 and December 31, 2017, respectively	412,653	478,826
Other assets	427,726	427,127
Total assets	11,057,030	11,145,717
Liabilities:
Notes payable	3,008,592	2,971,715
Unsecured credit facilities	708,616	623,262
Accounts payable and other liabilities	236,250	234,272
Acquired lease intangible liabilities, less accumulated amortization of $84,435 and $56,550 at September 30, 2018 and December 31, 2017, respectively	507,341	537,401
Tenants’ security, escrow deposits and prepaid rent	43,988	46,013
Total liabilities	4,504,787	4,412,663
Commitments and contingencies	0	0
Stockholders’ equity/Partners' capital:
General partner; 169,441,714 and 171,364,908 units outstanding at September 30, 2018 and December 31, 2017, respectively	6,498,028	6,698,341
Limited partners; 349,902 units outstanding at September 30, 2018 and December 31, 2017	10,726	10,907
Accumulated other comprehensive income (loss)	14,066	(6,289)
Total partners’ capital	6,522,820	6,702,959
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	29,423	30,095
Total equity	6,552,243	6,733,054
Total liabilities and equity	$ 11,057,030	$ 11,145,717

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Parent Company [Member]
Allowance for doubtful accounts receivable	$ 14,332	$ 12,728
Deferred costs accumulated amortization	98,829	93,291
Accumulated amortization of acquired lease intangible assets	206,378	148,280
Accumulated accretion of acquired lease intangible liabilities	$ 84,435	$ 56,550
Preferred stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	30,000,000	30,000,000
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	220,000,000	220,000,000
Common stock, shares issued	169,441,714	171,364,908
Exchangeable operating partnership units aggregate redemption value	$ 22,628	$ 24,206
Treasury stock, shares held at cost	385,652	366,628
Partnership Interest [Member]
Allowance for doubtful accounts receivable	$ 14,332	$ 12,728
Deferred costs accumulated amortization	98,829	93,291
Accumulated amortization of acquired lease intangible assets	206,378	148,280
Accumulated accretion of acquired lease intangible liabilities	$ 84,435	$ 56,550
Preferred units of general partner par value per unit	$ 0.01	$ 0.01
General partner units, outstanding	169,441,714	171,364,908
Limited partner units, outstanding	349,902	349,902

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Document Fiscal Year Focus			2018
Other expense (income):
Provision for impairment, net of tax			$ 29,443	$ 0
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes			4,448	4,913
Parent Company [Member]
Revenues:
Minimum rent	$ 204,005	$ 195,393	614,224	532,625
Percentage rent	1,224	1,147	6,292	5,509
Revenue from Contract with Customer, Including Assessed Tax	66,127	59,554	194,900	162,089
Property Management Fee Revenue	6,954	6,047	20,999	19,353
Total revenues	278,310	262,141	836,415	719,576
Operating expenses:
Depreciation and amortization	89,183	91,474	266,812	243,757
Operating and maintenance	40,557	38,020	124,924	103,888
General and administrative	17,564	15,199	51,947	49,618
Real estate taxes	35,129	29,315	97,096	79,636
Other operating expenses (note 2)	2,045	3,195	6,476	81,621
Total operating expenses	184,478	177,203	547,255	558,520
Other expense (income):
Interest expense, net	36,618	34,679	111,477	97,285
Provision for impairment, net of tax	855	0	29,443	0
Gain (Loss) on Extinguishment of Debt	0	0	11,172	12,404
Marketable Securities, Gain (Loss), Excluding Other-than-temporary Impairment Loss	(923)	(971)	(1,524)	(2,955)
Nonoperating Income (Expense)	36,550	33,708	150,568	106,734
Income from operations before equity in income of investments in real estate partnerships	57,282	51,230	138,592	54,322
Equity in income of investments in real estate partnerships	10,024	12,221	29,548	33,804
Income from operations	67,306	63,451	168,140	88,126
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	3,228	131	4,448	4,913
Net income	70,534	63,582	172,588	93,039
Noncontrolling interests:
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	147	132	358	217
Limited partners’ interests in consolidated partnerships	(665)	(637)	(2,008)	(1,884)
Income attributable to noncontrolling interests	(812)	(769)	(2,366)	(2,101)
Net income attributable to the Company	69,722	62,813	170,222	90,938
Preferred stock dividends and issuance costs	0	(3,147)	0	(16,128)
Net Income (Loss) Available to Common Stockholders, Basic	$ 69,722	$ 59,666	$ 170,222	$ 74,810
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48
Partnership Interest [Member]
Revenues:
Minimum rent	$ 204,005	$ 195,393	$ 614,224	$ 532,625
Percentage rent	1,224	1,147	6,292	5,509
Revenue from Contract with Customer, Including Assessed Tax	66,127	59,554	194,900	162,089
Property Management Fee Revenue	6,954	6,047	20,999	19,353
Total revenues	278,310	262,141	836,415	719,576
Operating expenses:
Depreciation and amortization	89,183	91,474	266,812	243,757
Operating and maintenance	40,557	38,020	124,924	103,888
General and administrative	17,564	15,199	51,947	49,618
Real estate taxes	35,129	29,315	97,096	79,636
Other operating expenses (note 2)	2,045	3,195	6,476	81,621
Total operating expenses	184,478	177,203	547,255	558,520
Other expense (income):
Interest expense, net	36,618	34,679	111,477	97,285
Provision for impairment, net of tax	855	0	29,443	0
Gain (Loss) on Extinguishment of Debt	0	0	11,172	12,404
Marketable Securities, Gain (Loss), Excluding Other-than-temporary Impairment Loss	(923)	(971)	(1,524)	(2,955)
Nonoperating Income (Expense)	36,550	33,708	150,568	106,734
Income from operations before equity in income of investments in real estate partnerships	57,282	51,230	138,592	54,322
Equity in income of investments in real estate partnerships	10,024	12,221	29,548	33,804
Income from operations	67,306	63,451	168,140	88,126
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	3,228	131	4,448	4,913
Net income	70,534	63,582	172,588	93,039
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(665)	(637)	(2,008)	(1,884)
Income attributable to noncontrolling interests	(665)	(637)	(2,008)	(1,884)
Net income attributable to the Company	69,869	62,945	170,580	91,155
Distributions Paid To Preferred Unit Holders	0	(3,147)	0	(16,128)
Net income attributable to common unit holders	$ 69,869	$ 59,798	$ 170,580	$ 75,027
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Document Fiscal Year Focus			2018
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 2,717	$ (39)	$ 16,511	$ (3,911)
Parent Company [Member]
Net income	(70,534)	(63,582)	(172,588)	(93,039)
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	2,717	(39)	16,511	(3,911)
Reclassification adjustment of derivative instruments included in net income	1,148	2,329	4,701	8,054
Available-for-sale Securities, Gross Unrealized Gain	24	8	(51)	51
Other comprehensive income	3,889	2,298	21,161	4,194
Comprehensive income	74,423	65,880	193,749	97,233
Less: comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(812)	(769)	(2,366)	(2,101)
Other comprehensive income (loss) attributable to noncontrolling interests	140	5	818	(11)
Comprehensive income attributable to noncontrolling interests	952	774	3,184	2,090
Comprehensive income attributable to the Company	73,471	65,106	190,565	95,143
Partnership Interest [Member]
Net income	(70,534)	(63,582)	(172,588)	(93,039)
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	2,717	(39)	16,511	(3,911)
Reclassification adjustment of derivative instruments included in net income	1,148	2,329	4,701	8,054
Available-for-sale Securities, Gross Unrealized Gain	24	8	(51)	51
Other comprehensive income	3,889	2,298	21,161	4,194
Comprehensive income	74,423	65,880	193,749	97,233
Less: comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(665)	(637)	(2,008)	(1,884)
Other comprehensive income (loss) attributable to noncontrolling interests	132	0	775	(17)
Comprehensive income attributable to noncontrolling interests	797	637	2,783	1,867
Comprehensive income attributable to the Company	$ 73,626	$ 65,243	$ 190,966	$ 95,366

Consolidated Statement of Changes in Equity - USD ($) $ in Thousands	Parent Company [Member]	Partnership Interest [Member]	Preferred Stock [Member] Parent Company [Member]	Common Stock [Member] Parent Company [Member]	Treasury Stock [Member] Parent Company [Member]	Additional Paid-in Capital [Member] Parent Company [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Parent Company [Member]	Distributions in Excess of Net Income [Member] Parent Company [Member]	Total Stockholders' Equity [Member] Parent Company [Member]	Noncontrolling Interest Exchangeable Operating Partnership Units [Member] Parent Company [Member]	Noncontrolling Interests in Limited Partners' Interest in Consolidated Partnerships [Member] Parent Company [Member]	Noncontrolling Interest [Member] Parent Company [Member]	Preferred Stock [Member] Parent Company [Member]	Preferred Stock [Member] Preferred Stock [Member] Parent Company [Member]	Preferred Stock [Member] Common Stock [Member] Parent Company [Member]	Preferred Stock [Member] Treasury Stock [Member] Parent Company [Member]	Preferred Stock [Member] Additional Paid-in Capital [Member] Parent Company [Member]	Preferred Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member] Parent Company [Member]	Preferred Stock [Member] Distributions in Excess of Net Income [Member] Parent Company [Member]	Preferred Stock [Member] Total Stockholders' Equity [Member] Parent Company [Member]	Preferred Stock [Member] Noncontrolling Interest Exchangeable Operating Partnership Units [Member] Parent Company [Member]	Preferred Stock [Member] Noncontrolling Interests in Limited Partners' Interest in Consolidated Partnerships [Member] Parent Company [Member]	Preferred Stock [Member] Noncontrolling Interest [Member] Parent Company [Member]	Common Stock [Member] Parent Company [Member]	Common Stock [Member] Preferred Stock [Member] Parent Company [Member]	Common Stock [Member] Common Stock [Member] Parent Company [Member]	Common Stock [Member] Treasury Stock [Member] Parent Company [Member]	Common Stock [Member] Additional Paid-in Capital [Member] Parent Company [Member]	Common Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member] Parent Company [Member]	Common Stock [Member] Distributions in Excess of Net Income [Member] Parent Company [Member]	Common Stock [Member] Total Stockholders' Equity [Member] Parent Company [Member]	Common Stock [Member] Noncontrolling Interest Exchangeable Operating Partnership Units [Member] Parent Company [Member]	Common Stock [Member] Noncontrolling Interests in Limited Partners' Interest in Consolidated Partnerships [Member] Parent Company [Member]	Common Stock [Member] Noncontrolling Interest [Member] Parent Company [Member]	Partners Capital Total [Member] Partnership Interest [Member]	Noncontrolling Interest [Member] Partnership Interest [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Partnership Interest [Member]	Limited Partner [Member] Partnership Interest [Member]	General Partner [Member] Partnership Interest [Member]	Equity One Inc. [Member] Parent Company [Member]	Equity One Inc. [Member] Partnership Interest [Member]	Equity One Inc. [Member] Preferred Stock [Member] Parent Company [Member]	Equity One Inc. [Member] Common Stock [Member] Parent Company [Member]	Equity One Inc. [Member] Treasury Stock [Member] Parent Company [Member]	Equity One Inc. [Member] Additional Paid-in Capital [Member] Parent Company [Member]	Equity One Inc. [Member] Accumulated Other Comprehensive Income (Loss) [Member] Parent Company [Member]	Equity One Inc. [Member] Distributions in Excess of Net Income [Member] Parent Company [Member]	Equity One Inc. [Member] Total Stockholders' Equity [Member] Parent Company [Member]	Equity One Inc. [Member] Noncontrolling Interest Exchangeable Operating Partnership Units [Member] Parent Company [Member]	Equity One Inc. [Member] Noncontrolling Interests in Limited Partners' Interest in Consolidated Partnerships [Member] Parent Company [Member]	Equity One Inc. [Member] Noncontrolling Interest [Member] Parent Company [Member]	Equity One Inc. [Member] Partners Capital Total [Member] Partnership Interest [Member]	Equity One Inc. [Member] Noncontrolling Interest [Member] Partnership Interest [Member]	Equity One Inc. [Member] Accumulated Other Comprehensive Income (Loss) [Member] Partnership Interest [Member]	Equity One Inc. [Member] Limited Partner [Member] Partnership Interest [Member]	Equity One Inc. [Member] General Partner [Member] Partnership Interest [Member]
Beginning balance at Dec. 31, 2016	$ 2,624,502		$ 325,000	$ 1,045	$ (17,062)	$ 3,294,923		$ (18,346)	$ (994,259)	$ 2,591,301	$ (1,967)	$ 35,168	$ 33,201
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	90,938	$ 91,155
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	93,039	93,039	0	0	0	0		0		90,938	217	1,884	2,101																							$ 91,155	$ 1,884	$ 0	$ 217	$ 90,938
Current period other comprehensive income, net	4,194	4,194	0	0	0	0	$ 4,205	4,205	0	4,205	6	(17)																								4,211		4,205	6	0
Other comprehensive income (loss) attributable to noncontrolling interests	(11)	(17)																																			(17)
Adjustments to Additional Paid in Capital, Share-based Compensation, Other Long-term Incentive Plans, Requisite Service Period Recognition	(9)		0	0	(986)	977		0	0	(9)	0	0	0
Restricted stock issued, net of amortization	10,920	10,920	0	2	0	10,918		0	0	10,920	0	0	0																							10,920	0	0	0	10,920	$ 7,951	$ 7,951	$ 0	$ 1	$ 0	$ 7,950	$ 0	$ 0	$ 7,951	$ 0	$ 0	$ 0	$ 7,951	$ 0	$ 0	$ 0	$ 7,951
Common stock redeemed for taxes withheld for stock based compensation, net																									$ 18,432	$ 0	$ 1	$ 0	$ 18,431	$ 0	$ 0	$ 18,432	$ 0	$ 0	$ 0
Common stock issued under dividend reinvestment plan	908	908																							908	0	0	0	908	0	0	908	0	0	0
Common stock issued, net of issuance costs																									4,471,413	0	654	0	4,470,759	0	0	4,471,413	0	0	0
Contributions from partners	13,467	13,467	0	0	0	0		0	0	0	13,100	367	13,467																							13,100	367	0	13,100	0
Distributions to partners	(7,086)	(241,240)	0	0	0	0		0	0	0	0	(7,086)	(7,086)																							(234,154)	(7,086)	0	(450)	(233,704)
Cash dividends declared: preferred stock/unit	5,029	5,029	0	0	0	0		0	5,029	5,029	0	0	0																							(5,029)	0	0	0	5,029
Redemption of preferred stock		325,000												$ 325,000	$ 325,000	$ 0	$ 0	$ 11,099	$ 0	$ 11,099	$ 325,000	$ 0	$ 0	$ 0												325,000	0	0	0	325,000
Preferred stock	(16,128)
Cash dividends declared - common stock/unit	234,154		0	0	0	0		0	233,704	233,704	450	0	450
Ending Balance at Sep. 30, 2017	6,636,684		0	1,701	(18,048)	7,779,103		(14,141)	(1,153,153)	6,595,462	10,906	30,316	41,222
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	6,763,957		0	1,714	(18,307)	7,873,104		(6,277)	(1,127,281)	6,722,953	10,907	30,097	41,004
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	30,903	30,903	0	0	0	0	12	12	30,889	30,901	0	2	2																							30,901	2	12	0	30,889
Beginning balance at Dec. 31, 2017	6,733,054		0	1,714	(18,307)	7,873,104		(6,289)	(1,158,170)	6,692,052	10,907	30,095	41,002
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	170,222	170,580
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	172,588	172,588	0	0	0	0		0		170,222	358	2,008	2,366																							170,580	2,008	0	358	170,222
Current period other comprehensive income, net	21,161	21,161	0	0	0	0	$ 20,343	20,343	0	20,343	43	775																								20,386		20,343	43	0
Other comprehensive income (loss) attributable to noncontrolling interests	818	775																																			775
Adjustments to Additional Paid in Capital, Share-based Compensation, Other Long-term Incentive Plans, Requisite Service Period Recognition	(14)		0	0	(1,243)	1,229		0	0	(14)	0	0	0
Restricted stock issued, net of amortization	12,308	12,308	0	1	0	12,307		0	0	12,308	0	0	0																							12,308	0	0	0	12,308
Common stock redeemed for taxes withheld for stock based compensation, net																									6,463	0	0	0	6,463	0	0	6,463	0	0	0
Stock Repurchased and Retired During Period, Value																									(124,989)	0	(21)	0	(124,968)	0	0	(124,989)	0	0	0
Common stock issued under dividend reinvestment plan	996	996																							996	0	0	0	996	0	0	996	0	0	0
Common stock issued, net of issuance costs																									$ 10	$ 0	$ 0	$ 0	$ 10	$ 0	$ 0	$ 10	$ 0	$ 0	$ 0
Distributions to partners	(3,457)	(287,311)	0	0	0	0		0	0	0	0	(3,457)	(3,457)																							(283,854)	(3,457)	0	(582)	(283,272)
Common units redeemed as a result of common stock redeemed by Parent Company, net of issuances		$ 5,457																																		$ 5,457	$ 0	$ 0	$ 0	$ 5,457
Preferred stock	0
Cash dividends declared - common stock/unit	283,854		0	0	0	0		0	283,272	283,272	582	0	582
Ending Balance at Sep. 30, 2018	$ 6,552,243		$ 0	$ 1,694	$ (19,550)	$ 7,756,215		$ 14,066	$ (1,240,331)	$ 6,512,094	$ 10,726	$ 29,423	$ 40,149

Consolidated Statement of Changes in Partner Capital Statement - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Partnership Interest [Member]
Common unit redeemed as result of common stock redeemed by parent		$ 4,453,889
Dividends, Preferred Stock, Cash		(5,029)
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 30,903
Partners' Capital, Adjusted Balance			6,763,957
Net income	$ 172,588	93,039
Other comprehensive income (loss)	21,161	4,194
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	775	(17)
Deferred Compensation Plan	(14)	9
Partners' Capital Account, Contributions		13,467
Partners' Capital Account, Distributions	(287,311)	(241,240)
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(124,989)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	12,308	10,920
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,552,243	6,636,684	6,733,054	$ 2,624,502
Partnership Interest [Member] \| Noncontrolling Interest [Member]
Common unit redeemed as result of common stock redeemed by parent		0
Dividends, Preferred Stock, Cash		0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			2
Partners' Capital, Adjusted Balance			30,097
Net income	2,008	1,884
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	775	(17)
Deferred Compensation Plan	0	0
Partners' Capital Account, Contributions		367
Partners' Capital Account, Distributions	(3,457)	(7,086)
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	29,423	30,316	30,095	35,168
Partnership Interest [Member] \| Partners Capital Total [Member]
Common unit redeemed as result of common stock redeemed by parent		4,453,889
Dividends, Preferred Stock, Cash		5,029
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			30,901
Partners' Capital, Adjusted Balance			6,733,860
Net income	170,580	91,155
Other comprehensive income (loss)	20,386	4,211
Deferred Compensation Plan	(14)	9
Partners' Capital Account, Contributions		13,100
Partners' Capital Account, Distributions	(283,854)	(234,154)
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(124,989)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	12,308	10,920
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,522,820	6,606,368	6,702,959	2,589,334
Partnership Interest [Member] \| AOCI Attributable to Parent [Member]
Common unit redeemed as result of common stock redeemed by parent		0
Dividends, Preferred Stock, Cash		0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			12
Partners' Capital, Adjusted Balance			(6,277)
Net income	0	0
Other comprehensive income (loss)	20,343	4,205
Deferred Compensation Plan	0	0
Partners' Capital Account, Contributions		0
Partners' Capital Account, Distributions	0	0
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	14,066	(14,141)	(6,289)	(18,346)
Partnership Interest [Member] \| Limited Partner [Member]
Common unit redeemed as result of common stock redeemed by parent		0
Dividends, Preferred Stock, Cash		0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			0
Partners' Capital, Adjusted Balance			10,907
Net income	358	217
Other comprehensive income (loss)	43	6
Deferred Compensation Plan	0	0
Partners' Capital Account, Contributions		13,100
Partners' Capital Account, Distributions	(582)	(450)
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	10,726	10,906	10,907	(1,967)
Partnership Interest [Member] \| General Partner [Member]
Common unit redeemed as result of common stock redeemed by parent		4,453,889
Dividends, Preferred Stock, Cash		(5,029)
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			30,889
Partners' Capital, Adjusted Balance			6,729,230
Net income	170,222	90,938
Other comprehensive income (loss)	0	0
Deferred Compensation Plan	(14)	9
Partners' Capital Account, Contributions		0
Partners' Capital Account, Distributions	(283,272)	(233,704)
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(124,989)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	12,308	10,920
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,498,028	6,609,603	6,698,341	$ 2,609,647
AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 12
Other comprehensive income (loss)	$ 20,343	4,205
Equity One Inc. [Member] \| Partnership Interest [Member]
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		7,951
Equity One Inc. [Member] \| Partnership Interest [Member] \| Noncontrolling Interest [Member]
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		0
Equity One Inc. [Member] \| Partnership Interest [Member] \| Partners Capital Total [Member]
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		7,951
Equity One Inc. [Member] \| Partnership Interest [Member] \| AOCI Attributable to Parent [Member]
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		0
Equity One Inc. [Member] \| Partnership Interest [Member] \| Limited Partner [Member]
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		0
Equity One Inc. [Member] \| Partnership Interest [Member] \| General Partner [Member]
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		$ 7,951

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for impairment, net of tax	$ 29,443	$ 0
Cash flows from investing activities:
Proceeds from sale of real estate investments	151,142	15,397
Cash flows from financing activities:
Repayment of unsecured credit facilities	(60,000)
Partnership Interest [Member]
Cash flows from operating activities:
Net income	(172,588)	(93,039)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	266,812	243,757
Amortization of deferred loan costs and debt premiums	7,599	7,144
Amortization of above and below Market Leases	(26,031)	(18,784)
Share-based Compensation	10,012	16,836
Equity in income of investments in real estate partnerships	(29,548)	(33,804)
Gain on sale of real estate, net of tax	(4,448)	(4,913)
Provision for impairment, net of tax	29,443	0
Gain (Loss) on Extinguishment of Debt	11,172	12,404
Distribution of earnings from operations of investments in real estate partnerships	(40,366)	(40,817)
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	0	51
Deferred compensation expense	1,475	2,885
Realized and unrealized gain on investments	(1,524)	(2,878)
Changes in assets and liabilities:
Tenant and other receivables, net	(13,326)	(11,327)
Deferred leasing costs	(6,259)	(10,294)
Other assets	(6,565)	8,075
Accounts payable and other liabilities	15,100	4,908
Tenants’ security, escrow deposits and prepaid rent	(2,111)	(2,490)
Net cash provided by operating activities	464,755	345,426
Cash flows from investing activities:
Acquisition of operating real estate	(85,766)	(2,109)
Payments for Deposits on Real Estate Acquisitions	(150)	(350)
Payments for Merger Related Costs	0	(646,790)
Real estate development and capital improvements	(174,145)	(240,827)
Proceeds from sale of real estate investments	151,142	13,323
Payments for (Proceeds from) Loans Receivable	15,648	(3,460)
Investments in real estate partnerships	(58,372)	(12,296)
Proceeds from Equity Method Investment, Distribution, Return of Capital	5,488	36,603
Dividends on investment securities	281	200
Acquisition of investment securities	(16,946)	(14,011)
Proceeds from sale of investment securities	15,639	11,974
Net cash used in investing activities	(147,181)	(857,743)
Cash flows from financing activities:
Payments Related to Tax Withholding for Share-based Compensation	(6,772)	(19,251)
Payments for Repurchase of Common Stock	(124,989)	0
Proceeds from sale of treasury stock	99	100
Payments for Repurchase of Preferred Units	0	325,000
Distributions to limited partners in consolidated partnerships, net	(3,457)	(7,031)
Dividends paid to common stockholders	(282,858)	(233,246)
Dividends paid to preferred stockholders	0	(5,029)
Repayments of Unsecured Debt	150,000	0
Proceeds from Issuance of Unsecured Debt	299,511	953,115
Proceeds from unsecured credit facilities	455,000	950,000
Repayment of unsecured credit facilities	(370,000)	(650,000)
Proceeds from notes payable	1,740	126,999
Repayments of Notes Payable	(113,037)	(232,839)
Scheduled principal payments	(7,767)	(7,452)
Payment of loan costs	(9,448)	(12,868)
Payment for Debt Extinguishment or Debt Prepayment Cost	10,491	12,419
Net cash (used in) provided by financing activities	(322,469)	525,079
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(4,895)	12,762
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	44,486	30,641
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $5,820 and $5,778 in 2018 and 2017, respectively)	104,210	73,273
Proceeds from Income Tax Refunds	(4,771)	(670)
Supplemental disclosure of non-cash transactions:
Partnership units issued for acquisition of real estate	0	13,100
Noncash or Part Noncash Acquisition, Debt Assumed	9,700	0
Common stock issued under dividend reinvestment plan	996	908
Stock-based compensation, net of capitalization	2,606	2,459
Contributions from limited partners in consolidated partnerships, net	0	311
Common stock issued for dividend reinvestment in trust	627	557
Contribution of stock awards into trust	1,244	1,372
Distribution of stock held in trust	524	677
Unrealized Gain (Loss) on Securities	5	51
Parent Company [Member]
Cash flows from operating activities:
Net income	(172,588)	(93,039)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	266,812	243,757
Amortization of deferred loan costs and debt premiums	7,599	7,144
Amortization of above and below Market Leases	(26,031)	(18,784)
Share-based Compensation	10,012	16,836
Equity in income of investments in real estate partnerships	(29,548)	(33,804)
Gain on sale of real estate, net of tax	(4,448)	(4,913)
Provision for impairment, net of tax	29,443	0
Gain (Loss) on Extinguishment of Debt	11,172	12,404
Distribution of earnings from operations of investments in real estate partnerships	(40,366)	(40,817)
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	0	51
Deferred compensation expense	1,475	2,885
Realized and unrealized gain on investments	(1,524)	(2,878)
Changes in assets and liabilities:
Tenant and other receivables, net	(13,326)	(11,327)
Deferred leasing costs	(6,259)	(10,294)
Other assets	(6,565)	8,075
Accounts payable and other liabilities	15,100	4,908
Tenants’ security, escrow deposits and prepaid rent	(2,111)	(2,490)
Net cash provided by operating activities	464,755	345,426
Cash flows from investing activities:
Acquisition of operating real estate	(85,766)	(2,109)
Payments for Deposits on Real Estate Acquisitions	(150)	(350)
Payments for Merger Related Costs	0	(646,790)
Real estate development and capital improvements	(174,145)	(240,827)
Proceeds from sale of real estate investments	151,142	13,323
Payments for (Proceeds from) Loans Receivable	15,648	(3,460)
Investments in real estate partnerships	(58,372)	(12,296)
Proceeds from Equity Method Investment, Distribution, Return of Capital	5,488	36,603
Dividends on investment securities	281	200
Acquisition of investment securities	(16,946)	(14,011)
Proceeds from sale of investment securities	15,639	11,974
Net cash used in investing activities	(147,181)	(857,743)
Cash flows from financing activities:
Payments Related to Tax Withholding for Share-based Compensation	(6,772)	(19,251)
Payments for Repurchase of Common Stock	(124,989)	0
Proceeds from sale of treasury stock	99	100
Payments for Repurchase of Preferred Units	0	325,000
Distributions to limited partners in consolidated partnerships, net	(3,457)	(7,031)
Distributions to exchangeable operating partnership unit holders	(582)	(450)
Dividends paid to common stockholders	(282,276)	(232,796)
Dividends paid to preferred stockholders	0	(5,029)
Repayments of Unsecured Debt	150,000	0
Proceeds from Issuance of Unsecured Debt	299,511	953,115
Proceeds from unsecured credit facilities	455,000	950,000
Repayment of unsecured credit facilities	(370,000)	(650,000)
Proceeds from notes payable	1,740	126,999
Repayments of Notes Payable	(113,037)	(232,839)
Scheduled principal payments	(7,767)	(7,452)
Payment of loan costs	(9,448)	(12,868)
Payment for Debt Extinguishment or Debt Prepayment Cost	10,491	12,419
Net cash (used in) provided by financing activities	(322,469)	525,079
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(4,895)	12,762
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	44,486	30,641
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $5,820 and $5,778 in 2018 and 2017, respectively)	104,210	73,273
Proceeds from Income Tax Refunds	(4,771)	(670)
Supplemental disclosure of non-cash transactions:
Partnership units issued for acquisition of real estate	0	13,100
Noncash or Part Noncash Acquisition, Debt Assumed	9,700	0
Common stock issued under dividend reinvestment plan	996	908
Stock-based compensation, net of capitalization	2,606	2,459
Contributions from limited partners in consolidated partnerships, net	0	311
Common stock issued for dividend reinvestment in trust	627	557
Contribution of stock awards into trust	1,244	1,372
Distribution of stock held in trust	524	677
Unrealized Gain (Loss) on Securities	5	51
Equity One Inc. [Member] \| Partnership Interest [Member]
Supplemental disclosure of non-cash transactions:
Noncash or Part Noncash Acquisition, Debt Assumed	0	757,399
Units Issued to Parent Company for common stock exchanged for Equity One shares	0	4,471,808
Equity One Inc. [Member] \| Parent Company [Member]
Supplemental disclosure of non-cash transactions:
Noncash or Part Noncash Acquisition, Debt Assumed	0	757,399
Common stock exchanged for Equity One shares	$ 0	$ 4,471,808

Organization and Principles of Consolidation

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Principles of Consolidation

Organization and Significant Accounting Policies

General

Regency Centers Corporation (the “Parent Company”) began its operations as a Real Estate Investment Trust (“REIT”) in 1993 and is the general partner of Regency Centers, L.P. (the “Operating Partnership”). The Parent Company primarily engages in the ownership, management, leasing, acquisition, and development and redevelopment of shopping centers through the Operating Partnership, and has no other assets other than through its investment in the Operating Partnership, and its only liabilities are the unsecured notes assumed from the merger with Equity One, Inc. ("Equity One"), which are co-issued and guaranteed by the Operating Partnership. The Parent Company guarantees all of the unsecured debt of the Operating Partnership.

As of September 30, 2018, the Parent Company, the Operating Partnership, and their controlled subsidiaries on a consolidated basis owned 306 properties and held partial interests in an additional 120 properties through unconsolidated investments in real estate partnerships (also referred to as "joint ventures" or "investment partnerships").

The consolidated financial statements reflect all adjustments which are, in the opinion of management, necessary to fairly state the results for the interim periods presented. These adjustments are considered to be of a normal recurring nature.

Consolidation

The Company consolidates properties that are wholly owned and properties where it owns less than 100%, but which it controls. Control is determined using an evaluation based on accounting standards related to the consolidation of voting interest entities and variable interest entities ("VIEs"). For joint ventures that are determined to be a VIE, the Company consolidates the entity where it is deemed to be the primary beneficiary. Determination of the primary beneficiary is based on whether an entity has (1) the power to direct the activities of the VIE that most significantly impact the entity's economic performance, and (2) the obligation to absorb losses of the entity that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE. The Company's determination of the primary beneficiary considers all relationships between it and the VIE, including management agreements and other contractual arrangements.

Ownership of the Operating Partnership

The Operating Partnership’s capital includes general and limited common Partnership Units. As of September 30, 2018, the Parent Company owned approximately 99.8% of the outstanding common Partnership Units of the Operating Partnership with the remaining limited common Partnership Units held by third parties (“Exchangeable operating partnership units” or “EOP units”). The EOP units are exchangeable for one share of common stock of the Parent Company and the unit holder cannot require redemption in cash or other assets. The Parent Company classifies EOP units as permanent equity in the accompanying Consolidated Balance Sheets and Consolidated Statements of Equity and Comprehensive Income. The Parent Company serves as general partner of the Operating Partnership. The EOP unit holders have limited rights over the Operating Partnership such that they do not have the power to direct the activities of the Operating Partnership. As such, the Operating Partnership is considered a VIE, and the Parent Company, which consolidates it, is the primary beneficiary. The Parent Company’s only investment is the Operating Partnership. Net income and distributions of the Operating Partnership are allocable to the general and limited common Partnership Units in accordance with their ownership percentages.

Real Estate Partnerships

As of September 30, 2018, Regency had a partial ownership interest in 131 properties through partnerships, of which 11 are consolidated. Regency's partners include institutional investors, other real estate developers and/or operators, and individual parties who had a role in Regency sourcing transactions for development and investment (the "Partners" or "limited partners"). Regency has a variable interest in these entities through its equity interests. As managing member, Regency maintains the books and records and typically provides leasing and property management to the partnerships. The partners’ level of involvement varies from protective decisions (debt, bankruptcy, selling primary asset(s) of the business) to involvement in approving leases, operating budgets, and capital budgets.


•	Those partnerships for which the Partners only have protective rights are considered VIEs under ASC 810, Consolidation. Regency is the primary beneficiary of these VIEs as Regency has power over these partnerships and they operate primarily for the benefit of Regency. As such, Regency consolidates these entities and reports the limited partners’ interest as noncontrolling interests.

The majority of the operations of the VIEs are funded with cash flows generated by the properties, or in the case of developments, with capital contributions or third party construction loans. Regency does not provide financial support to the VIEs.


•	Those partnerships for which the partners are involved in the day to day decisions and do not have any other aspects that would cause them to be considered VIEs, are evaluated for consolidation using the voting interest model.


◦	Those partnerships in which Regency has a controlling financial interest are consolidated; and the limited partners’ ownership interest and share of net income is recorded as noncontrolling interest.

◦

Those partnerships in which Regency does not have a controlling financial interest are accounted for using the equity method, and its ownership interest is recognized through single-line presentation as Investments in real estate partnerships in the Consolidated Balance Sheets, and Equity in income of investments in real estate partnerships in the Consolidated Statements of Operations. Cash distributions of earnings from operations from investments in real estate partnerships are presented in cash flows provided by operating activities in the accompanying Consolidated Statements of Cash Flows. Cash distributions from the sale of a property or loan proceeds received from the placement of debt on a property included in investments in real estate partnerships are presented in cash flows provided by investing activities in the accompanying Consolidated Statements of Cash Flows. Distributed proceeds from debt refinancing and real estate sales in excess of Regency's carrying value of its investment has resulted in a negative investment balance for one partnership, which is recorded within accounts payable and other liabilities in the Consolidated Balance Sheets.


◦	The net difference in the carrying amount of investments in real estate partnerships and the underlying equity in net assets is accreted to income and recorded in equity in income of investments in real estate partnerships in the accompanying Consolidated Statements of Operations over the expected useful lives of the properties and other intangible assets, which range from 10 to 40 years.

The assets of these partnerships are restricted to the use of the partnerships and cannot be used by general creditors of the Company. And similarly, the obligations of the partnerships can only be settled by the assets of these partnerships.

The major classes of assets, liabilities, and non-controlling equity interests held by the Company's consolidated VIEs, exclusive of the Operating Partnership as a whole, are as follows:



(in thousands)	September 30, 2018		December 31, 2017
Assets
Net real estate investments	$	163,283	172,736
Cash and cash equivalents	4,635		4,993
Liabilities
Notes payable	18,403		16,551
Equity
Limited partners’ interests in consolidated partnerships	17,263		17,572

Revenues and Tenant and Other Receivables

On January 1, 2018, the Company adopted the new accounting guidance for revenue recognition (Topic 606 Revenue from Contracts with Customers, “Topic 606”), as discussed further in the section below, Recent Accounting Pronouncements. Upon adoption of the new standard, certain of the Company's significant accounting policies subject to Topic 606 have been updated.

The Company adopted Topic 606 using a modified retrospective approach and applied the transition practical expedients allowed by the standard. Additionally, the Company applied the practical expedient related to the remaining performance obligations, because all of its performance obligations are satisfied at a point in time, are part of a contract that has an original expected duration of one year or less, or are considered to be a series of performance obligations where variable consideration is allocated entirely to a wholly unsatisfied distinct day of service that forms part of the series, such that the Company does not need to estimate variable consideration to recognize revenue.

Subsequent to the adoption of Topic 606, the Company recognizes revenue when or as control of the promised services are transferred to its customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services. The following is a description of the Company's revenue from contracts with customers which is in the scope of Topic 606.

Property and Asset Management Services

The Company is engaged under agreements with its joint venture partnerships, which are generally perpetual in nature and cancellable through unanimous partner approval, absent an event of default. Under these agreements, the Company is to provide asset management, property management, and leasing services for the joint ventures' shopping centers. The fees are market-based, generally calculated as a percentage of either revenues earned or the estimated values of the properties managed or the proceeds received, and are recognized over the monthly or quarterly periods as services are rendered. Property management and asset management services represent a series of distinct daily services. Accordingly, the Company satisfies its performance obligation as service is rendered each day and the variability associated with that compensation is resolved each day. Amounts due from the partnerships for such services are paid during the month following the monthly or quarterly service periods.

Several of the Company’s partnership agreements provide for incentive payments, generally referred to as “promotes” or “earnouts,” to Regency for appreciation in property values in Regency's capacity as manager. The terms of these promotes are based on appreciation in real estate value over designated time intervals. The Company evaluates its expected promote payout at each reporting period, which generally does not result in revenue recognition until the measurement period has completed, when the amount can be reasonably determined and the amount is not probable of significant reversal. The Company did not recognize any promote revenue during the nine months ended September 30, 2018 or 2017.

Leasing Services

Leasing service fees are based on a percentage of the total rent due under the lease. The leasing service is considered performed upon successful execution of an acceptable tenant lease for the joint ventures’ shopping centers, at which time revenue is recognized. Payment of the first half of the fee is generally due upon lease execution and the second half is generally due upon tenant opening or rent payments commencing.

Transaction Services

The Company also receives transaction fees, as contractually agreed upon with each joint venture, which include acquisition fees, disposition fees, and financing service fees. Control of these services is generally transferred at the time the related transaction closes, which is the point in time when the Company recognizes the related fee revenue. Any unpaid amounts related to transaction-based fees are included in Accounts receivable.

All income from contracts with the Company's real estate partnerships is included within Management, transaction and other fees on the Consolidated Statements of Operations, as follows:



		Three months ended September 30,			Nine months ended September 30,
(in thousands)	Timing of satisfaction of performance obligations	2018		2017	2018		2017
Property management services	Over time	$	3,588	3,446	$	11,008	10,452
Asset management services	Over time	1,840		1,762	5,347		5,314
Leasing services	Point in time	969		669	2,726		2,285
Other transaction fees	Point in time	557		170	1,918		1,302
Total management, transaction, and other fees		$	6,954	6,047	$	20,999	19,353

The accounts receivable for management services, which are included within Tenant and other receivables in the accompanying Consolidated Balance Sheets, are $10.1 million and $8.7 million, as of September 30, 2018 and December 31, 2017, respectively.

Real Estate Sales

On January 1, 2018, the Company adopted the new accounting guidance for sales of nonfinancial assets (“Subtopic 610-20”), as discussed further in the section below, Recent Accounting Pronouncements. Upon adoption of the new standard, the Company's accounting policy for real estate sales subject to Subtopic 610-20 has been updated. The Company now derecognizes real estate and recognizes a gain or loss on sales of real estate when a contract exists and control of the property has transferred to the buyer. Control of the property, including controlling financial interest, is generally considered to transfer upon closing through transfer of the legal title and possession of the property. Any retained non-controlling interest is measured at fair value. This change in accounting policy resulted in the recognition, through opening retained earnings on January 1, 2018, of $30.9 million of previously deferred gains from property sales to the Company's Investments in real estate partnerships.

Goodwill

Goodwill represents the excess of the purchase price consideration for the Equity One merger over the fair value of the assets acquired and liabilities assumed, which amount reflects expected synergies from combining Regency's and Equity One's operations and the deferred tax liability at one of the acquired taxable REIT subsidiaries. The Company accounts for goodwill in accordance with Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 350, Intangibles - Goodwill and Other, and allocates its goodwill to its reporting units, which have been determined to be at the individual property level. The Company performs an impairment evaluation of its goodwill at least annually, in November of each year, or more frequently as triggers occur.

The goodwill impairment evaluation may be completed through a qualitative or quantitative approach. Under a qualitative approach, the impairment review for goodwill consists of an assessment of whether it is more-likely-than-not that the reporting unit’s fair value is less than its carrying value, including goodwill. If a qualitative approach indicates it is more likely-than-not that the estimated carrying value of a reporting unit (including goodwill) exceeds its fair value, or if the Company chooses to bypass the qualitative approach for any reporting unit, the Company will perform the quantitative approach described below.

The quantitative approach consists of estimating the fair value of each reporting unit using discounted projected future cash flows and comparing those estimated fair values with the carrying values, which include the allocated goodwill. If the estimated fair value is less than the carrying value, the Company would then recognize a goodwill impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value, not to exceed the total amount of goodwill allocated to that reporting unit.

Real Estate Investments

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Real Estate Investments

The following table details the components of Land, building and improvements in the Consolidated Balance Sheets:



(in thousands)	September 30, 2018		December 31, 2017
Land	$	4,215,399	4,235,032
Land improvements	626,787		556,140
Buildings	5,126,219		4,999,378
Building and tenant improvements	885,878		787,880
Total Land, building and improvements	$	10,854,283	10,578,430

Acquisitions

The following table details the shopping centers acquired or land acquired or leased for development:



(in thousands)		Nine months ended September 30, 2018
Date Purchased	Property Name	City/State	Property Type	Ownership	Purchase Price	Debt Assumed, Net of Premiums	Intangible Assets	Intangible Liabilities
1/2/18	Ballard Blocks I	Seattle, WA	Operating	49.9%	$54,500	—	3,668	2,350
1/2/18	Ballard Blocks II	Seattle, WA	Development	49.9%	4,000	—	—	—
1/5/18	The District at Metuchen	Metuchen, NJ	Operating	20%	33,830	—	3,147	1,905
1/10/18	Hewlett Crossing I & II	Hewlett, NY	Operating	100%	30,900	9,700	3,114	1,868
4/3/2018	Rivertowns Square	Dobbs Ferry, NY	Operating	100%	68,933	—	4,993	5,554
5/18/2018	Crossroads Commons II	Boulder, CO	Operating	20%	10,500	—	447	769
9/7/2018	Ridgewood Shopping Center	Raleigh, NC	Operating	20%	45,800	10,233	3,372	2,278
Total property acquisitions					$248,463	19,933	18,741	14,724

(in thousands)		Nine months ended September 30, 2017
Date Purchased	Property Name	City/State	Property Type	Ownership	Purchase Price	Debt Assumed, Net of Premiums	Intangible Assets	Intangible Liabilities
3/6/17	The Field at Commonwealth	Chantilly, VA	Development	100%	$9,500	—	—	—
3/8/17	Pinecrest Place ⁽¹⁾	Miami, FL	Development	100%	—	—	—	—
4/13/17	Mellody Farm ⁽²⁾	Chicago, IL	Development	100%	26,200	—	—	—
6/28/17	Concord outparcel ⁽³⁾	Miami, FL	Operating	100%	350	—	—	—
7/20/17	Aventura Square outparcel ⁽⁴⁾	Miami, FL	Operating	100%	1,750	—	90	9
Total property acquisitions					$37,800	—	90	9
⁽¹⁾ The Company leased 10.67 acres for a ground up development.
⁽²⁾ The Operating Partnership issued 195,732 partnership units valued at $13.1 million as partial consideration for the purchase.
⁽³⁾ The Company purchased a 0.67 acre vacant outparcel adjacent to the Company's existing operating Concord Shopping Plaza.
⁽⁴⁾ The Company purchased a 0.06 acre outparcel improved with a leased building adjacent to the Company's existing operating Aventura Square shopping center.

Equity One Merger

General

On March 1, 2017, Regency completed its merger with Equity One, a NYSE listed shopping center company, whereby Equity One merged with and into Regency, with Regency continuing as the surviving public company. Under the terms of the Merger Agreement, each Equity One stockholder received 0.45 of a newly issued share of Regency common stock for each share of Equity One common stock owned immediately prior to the effective time of the merger resulting in approximately 65.5 million Regency common shares being issued to effect the merger.

The following table provides the components that made up the total purchase price for the Equity One merger:



(in thousands, except stock price)	Purchase Price
Shares of common stock issued for merger	65,379
Closing stock price on March 1, 2017	$	68.40
Value of common stock issued for merger	$	4,471,808
Other cash payments	721,297
Total purchase price	$	5,193,105

As part of the merger, Regency acquired 121 properties, including 8 properties held through co-investment partnerships. The consolidated net assets and results of operations of Equity One are included in the consolidated financial statements from the closing date, March 1, 2017.

Final Purchase Price Allocation of Merger

The Equity One merger has been accounted for using the acquisition method of accounting in accordance with ASC 805, Business Combinations, which requires, among other things, that the assets acquired and liabilities assumed be recognized at their acquisition date fair values, and allows a measurement period, not to exceed one year from the acquisition date, to finalize the acquisition date fair values.

The acquired assets and assumed liabilities of an acquired operating property generally include, but are not limited to: land, buildings and improvements, identified tangible and intangible assets and liabilities associated with in-place leases, including tenant improvements, leasing costs, value of above-market and below-market leases, and value of acquired in-place leases. This methodology requires estimating an “as-if vacant” fair value of the physical property, which includes land, building, and improvements and also determining the estimated fair value of identifiable intangible assets and liabilities, considering the following categories: (i) value of in-place leases, and (ii) above and below-market value of in-place leases, and deferred taxes related to the book tax difference created through purchase accounting. The excess of the purchase price consideration over the fair value of assets acquired and liabilities assumed results in goodwill in the business combination, which reflects expected synergies from combining Regency's and Equity One's operations and the deferred tax liability at one of the acquired taxable REIT subsidiaries. The goodwill is not deductible for tax purposes.

The fair value of the acquired operating properties is based on a valuation prepared by Regency with assistance of a third party valuation specialist. The third party used stabilized Net Operating Income (“NOI”) and market specific capitalization and discount rates as the primary inputs in determining the fair value of the real estate assets. Management reviewed the inputs used by the third party specialist as well as the allocation of the purchase price to ensure reasonableness and that the procedures were performed in accordance with management's policy. Management and the third party valuation specialist have prepared their fair value estimates for each of the operating properties acquired, and completed the purchase price allocation during the measurement period.

The following table summarizes the final purchase price allocation based on the Company's valuation, including estimates and assumptions of the acquisition date fair value of the tangible and intangible assets acquired and liabilities assumed:



(in thousands)	Final Purchase Price Allocation
Land	$	2,865,053
Building and improvements	2,619,163
Properties in development	68,744
Properties held for sale	19,600
Investments in unconsolidated real estate partnerships	99,666
Real estate assets	5,672,226
Cash, accounts receivable and other assets	112,909
Intangible assets	458,877
Goodwill	332,384
Total assets acquired	6,576,396
Notes payable	757,399
Accounts payable, accrued expenses, and other liabilities	122,217
Lease intangible liabilities	503,675
Total liabilities assumed	1,383,291
Total purchase price	$	5,193,105

The following table details the weighted average amortization and net accretion periods, in years, of the major classes of intangible assets and intangible liabilities arising from the Equity One merger:



(in years)		Weighted Average Amortization / Accretion Period
Assets:
In-place leases		10.8
Above-market leases		7.8
Below-market ground leases		55.3
Liabilities:
Below-market leases		24.9

Pro forma Information

The following unaudited pro forma financial data includes the incremental revenues, operating expenses, depreciation and amortization, and costs of the Equity One acquisition as if it had occurred on January 1, 2016:



	Three months ended September 30,		Nine months ended September 30,
(in thousands, except per share data)	2017		2017
Total revenues	$	262,708	$	788,345
Income from operations⁽¹⁾	63,537		190,112
Net income attributable to common stockholders ⁽¹⁾	59,621		171,795
Income per common share - basic	0.35		1.01
Income per common share - diluted	0.35		1.01
⁽¹⁾The pro forma earnings for the three and nine months ended September 30, 2017, were adjusted to exclude $1.2 million and $98.5 million of merger costs, respectively, as if they had occurred in 2016.

The pro forma financial data is not necessarily indicative of what the actual results of operations would have been assuming the transaction had been completed as set forth above, nor does it purport to represent the results of operations for future periods.

Property Dispositions

9 Months Ended

Sep. 30, 2018

Discontinued Operations and Disposal Groups [Abstract]

Property Dispositions

Dispositions

The following table provides a summary of consolidated shopping centers and land parcels disposed of during the periods set forth below:



	Three months ended September 30,					Nine months ended September 30,
(in thousands, except number sold data)	2018			2017		2018			2017
Net proceeds from sale of real estate investments	$	108,634		167		$	151,142		15,397
Gain on sale of real estate, net of tax	$	3,228		131		$	4,448		4,913
Provision for impairment of real estate sold	$	855		—		$	29,443		—
Number of operating properties sold	3			—		7			1
Number of land parcels sold	3			—		6			7
Percent interest sold	100		%	—	%	100		%	100	%

At September 30, 2018, the Company also had three properties classified as Properties held for sale on the Consolidated Balance Sheets, which have sold or are expected to sell subsequent to September 30, 2018.

Other Assets Other Assets (Notes)

9 Months Ended

Sep. 30, 2018

Other Assets [Abstract]

Other Assets Disclosure [Text Block]

Other Assets

The following table represents the components of Other assets in the accompanying Consolidated Balance Sheets:



(in thousands)	September 30, 2018		December 31, 2017
Goodwill	$	318,710	331,884
Investments	44,014		41,636
Prepaid and other	24,093		30,332
Derivative assets	26,802		14,515
Furniture, fixtures, and equipment, net	6,715		6,123
Deferred financing costs, net	7,392		2,637
Total other assets	$	427,726	427,127

The following table presents the goodwill balances and activity during the year to date periods ended:



(in thousands)	September 30, 2018			December 31, 2017
Beginning of year balance	$	331,884		—
Goodwill resulting from Equity One merger	500			331,884
Goodwill allocated to Gain on sale of real estate	(2,525		)	—
Goodwill allocated to Provision for impairment	(9,220		)	—
Goodwill allocated to properties held for sale	(1,929		)	—
End of period balance	$	318,710		331,884

During the nine months ended September 30, 2018, the Company recognized a $29.4 million provision for impairment, net of tax, on five operating properties that sold during the year, including $9.2 million of goodwill. As the Company identifies properties ("reporting units") that no longer meet its investment criteria, it will evaluate the property for potential sale. A decision to sell a reporting unit results in the need to evaluate its goodwill for recoverability and may result in impairment. If events occur that trigger an impairment evaluation at multiple reporting units, a goodwill impairment may or may not be significant.

Notes Payable and Unsecured Credit Facilities

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Notes Payable and Unsecured Credit Facilities

The Company’s outstanding debt consisted of the following:



(in thousands)	Weighted Average Contractual Rate	Weighted Average Effective Rate	September 30, 2018			December 31, 2017
Notes payable:
Fixed rate mortgage loans	4.8%	4.3%	$	406,072		520,193
Variable rate mortgage loans	3.3%	3.6%	127,796		⁽¹⁾	125,866
Fixed rate unsecured public and private debt	4.0%	4.4%	2,474,724			2,325,656
Total notes payable			3,008,592			2,971,715
Unsecured credit facilities:
Line of Credit (the "Line") ⁽²⁾	2.9%	3.1%	145,000			60,000
Term loans	2.4%	2.5%	563,616			563,262
Total unsecured credit facilities			708,616			623,262
Total debt outstanding			$	3,717,208		3,594,977

⁽¹⁾ Includes five mortgages whose interest rates vary on LIBOR based formulas. Three of these variable rate loans have interest rate swaps in place to fix the interest rates at a range of 2.8% to 4.1%.
⁽²⁾ Weighted average effective and contractual rate for the Line is calculated based on a fully drawn Line balance.

Significant financing activity during 2018 includes:

•

On March 9, 2018, the Company received proceeds from issuing $300.0 million of 4.125% senior unsecured public notes, which priced at 99.837% and mature in March 2028. $60.0 million of the proceeds were used to repay our Line and $163.2 million was used to early redeem, on April 2, 2018, the $150.0 million 6% senior unsecured public notes originally due June 2020, including accrued and unpaid interest through the redemption date and a make-whole amount. The remainder of the proceeds were used to repay 2018 mortgage maturities and for general corporate purposes.

•

On March 26, 2018, the Company amended and restated its unsecured revolving credit facility (the “Line”). The amendment and restatement increases the size of the Line to $1.25 billion from $1.0 billion and extends the maturity date to March 23, 2022, with options to extend the maturity for two additional six-month periods. Borrowings will bear interest at an annual rate of LIBOR plus 87.5 basis points, subject to the Company’s credit ratings, compared to a rate of 92.5 basis points under its previous facility. An annual facility fee of 15 basis points, subject to the Company’s credit ratings, applies to the Line.

As of September 30, 2018, scheduled principal payments and maturities on notes payable and unsecured credit facilities were as follows:



(in thousands)	September 30, 2018
Scheduled Principal Payments and Maturities by Year:	Scheduled Principal Payments		Mortgage Loan Maturities	Unsecured Maturities ⁽¹⁾		Total
2018	$	2,196	—	—		2,196
2019	9,519		13,216	—		22,735
2020	11,287		78,580	300,000		389,867
2021	11,600		77,060	250,000		338,660
2022	11,799		5,848	710,000		727,647
Beyond 5 Years	37,056		269,217	1,950,000		2,256,273
Unamortized debt premium/(discount) and issuance costs	—		6,490	(26,660	)	(20,170	)
Total	$	83,457	450,411	3,183,340		3,717,208

⁽¹⁾ Includes unsecured public and private debt and unsecured credit facilities.

The Company has $13.2 million of mortgage loans maturing through 2019, which it currently intends to repay if wholly owned, or refinance if held within a consolidated real estate investment partnership. The Company has sufficient capacity on its Line to repay this maturing debt, all of which is in the form of non-recourse mortgage loans.

The Company was in compliance as of September 30, 2018 with the financial and other covenants under its unsecured public and private placement debt and unsecured credit facilities.

Derivatives

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

The Company may use derivative financial instruments, including interest rate swaps, caps, options, floors, and other interest rate derivative contracts, to hedge all or a portion of the interest rate risk associated with its borrowings. The principal objective of such arrangements is to minimize the risks and/or costs associated with the Company’s operating and financial structure as well as to hedge specific anticipated transactions. The Company does not intend to utilize derivatives for speculative or other purposes other than interest rate risk management. The use of derivative financial instruments carries certain risks, including the risk that the counterparties to these contractual arrangements are not able to perform under the agreements. To mitigate this risk, the Company only enters into derivative financial instruments with counterparties with high credit ratings and with major financial institutions with which the Company and its affiliates may also have other financial relationships. The Company does not anticipate that any of the counterparties will fail to meet their obligations.

The Company’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount.

The following table summarizes the terms and fair values of the Company's derivative financial instruments, as well as their classification on the Consolidated Balance Sheets:



						Fair Value
(in thousands)						Assets (Liabilities)⁽¹⁾
Effective Date	Maturity Date	Notional Amount		Counterparty Pays Variable Rate of	Regency Pays Fixed Rate of	September 30, 2018		December 31, 2017
4/3/17	12/2/20	$	300,000	1 Month LIBOR with Floor	1.824%	$	6,410	1,804
8/1/16	1/5/22	265,000		1 Month LIBOR with Floor	1.053%	15,286		10,744
4/7/16	4/1/23	20,000		1 Month LIBOR	1.303%	1,310		801
12/1/16	11/1/23	33,000		1 Month LIBOR	1.490%	2,151		1,166
6/2/17	6/2/27	37,500		1 Month LIBOR with Floor	2.366%	1,645		(177	)
						$	26,802	14,338

⁽¹⁾ Derivatives in an asset position are included within Other assets in the accompanying Consolidated Balance Sheets, while those in a liability position are included within Accounts payable and other liabilities.

These derivative financial instruments are all interest rate swaps, which are designated and qualify as cash flow hedges. The Company does not use derivatives for trading or speculative purposes and, as of September 30, 2018, does not have any derivatives that are not designated as hedges. The Company has master netting agreements; however, the Company does not have multiple derivatives subject to a single master netting agreement with the same counterparties. Therefore, none are offset in the accompanying Consolidated Balance Sheets.

The changes in the fair value of derivatives designated and qualifying as cash flow hedges is recorded in accumulated other comprehensive income (loss) ("AOCI") and subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings.

The following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements:



Location and Amount of Gain (Loss) Recognized in OCI on Derivative					Location and Amount of Gain (Loss) Reclassified from AOCI into Income						Total Interest Expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded
	Three months ended September 30,					Three months ended September 30,						Three months ended September 30,
(in thousands)	2018		2017			2018			2017			2018		2017
Interest rate swaps	$	2,717	(39	)	Interest expense	$	(1,148	)	(2,329	)	Interest expense, net	$	36,618	34,679

Location and Amount of Gain (Loss) Recognized in OCI on Derivative					Location and Amount of Gain (Loss) Reclassified from AOCI into Income						Total Interest Expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded
	Nine months ended September 30,					Nine months ended September 30,						Nine months ended September 30,
(in thousands)	2018		2017			2018			2017			2018		2017
Interest rate swaps	$	16,511	(3,911	)	Interest expense	$	(4,701	)	(8,054	)	Interest expense, net	$	111,477	97,285

As of September 30, 2018, the Company expects approximately $600,000 of net deferred losses on derivative instruments in AOCI, including the Company's share from its Investments in real estate partnerships, to be reclassified into earnings during the next 12 months. Included in the reclass is $7.9 million which is related to previously settled swaps on the Company's ten year fixed rate unsecured loans.

Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

(a) Disclosure of Fair Value of Financial Instruments

All financial instruments of the Company are reflected in the accompanying Consolidated Balance Sheets at amounts which, in management's estimation, reasonably approximate their fair values, except for the following:



	September 30, 2018			December 31, 2017
(in thousands)	Carrying Amount		Fair Value	Carrying Amount		Fair Value
Financial assets:
Notes receivable	$	—	—	$	15,803	15,660
Financial liabilities:
Notes payable	$	3,008,592	2,952,604	$	2,971,715	3,058,044
Unsecured credit facilities	$	708,616	710,000	$	623,262	625,000

The above fair values represent management's estimate of the amounts that would be received from selling those assets or that would be paid to transfer those liabilities in an orderly transaction between market participants as of September 30, 2018 and December 31, 2017, respectively. These fair value measurements maximize the use of observable inputs. However, in situations where there is little, if any, market activity for the asset or liability at the measurement date, the fair value measurement reflects the Company's own judgments about the assumptions that market participants would use in pricing the asset or liability.

The Company develops its judgments based on the best information available at the measurement date, including expected cash flows, appropriate risk-adjusted discount rates, and available observable and unobservable inputs. Service providers involved in fair value measurements are evaluated for competency and qualifications on an ongoing basis. As considerable judgment is often necessary to estimate the fair value of these financial instruments, the fair values presented above are not necessarily indicative of amounts that will be realized upon disposition of the financial instruments.

(b) Fair Value Measurements

The following financial instruments are measured at fair value on a recurring basis:

Securities

The Company has investments in marketable securities that are included within other assets on the accompanying Consolidated Balance Sheets. The fair value of the securities was determined using quoted prices in active markets, which are considered Level 1 inputs of the fair value hierarchy. Changes in the value of securities are recorded within Net investment (income) loss in the accompanying Consolidated Statements of Operations.

Available-for-Sale Debt Securities

Available-for-sale debt securities consist of investments in certificates of deposit and corporate bonds, and are recorded at fair value using matrix pricing methods to estimate fair value, which are considered Level 2 inputs of the fair value hierarchy. Unrealized gains or losses on these debt securities are recognized through other comprehensive income.

Interest Rate Derivatives

The fair value of the Company's interest rate derivatives is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty's nonperformance risk in the fair value measurements.

Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by the Company and its counterparties. The Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its interest rate swaps. As a result, the Company determined that its interest rate swaps valuation in its entirety is classified in Level 2 of the fair value hierarchy.

The following tables present the placement in the fair value hierarchy of assets and liabilities that are measured at fair value on a recurring basis:



	Fair Value Measurements as of September 30, 2018
(in thousands)			Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs	Significant Unobservable Inputs
Assets:	Balance		(Level 1)	(Level 2)	(Level 3)
Securities	$	36,027	36,027	—	—
Available-for-sale debt securities	7,987		—	7,987	—
Interest rate derivatives	26,802		—	26,802	—
Total	$	70,816	36,027	34,789	—



	Fair Value Measurements as of December 31, 2017
(in thousands)				Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs		Significant Unobservable Inputs
Assets:	Balance			(Level 1)	(Level 2)		(Level 3)
Securities	$	31,662		31,662	—		—
Available-for-sale debt securities	9,974			—	9,974		—
Interest rate derivatives	14,515			—	14,515		—
Total	$	56,151		31,662	24,489		—

Liabilities:
Interest rate derivatives	$	(177	)	—	(177	)	—

There were no assets measured at fair value on a nonrecurring basis as of September 30, 2018 or December 31, 2017.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Equity and Capital

9 Months Ended

Sep. 30, 2018

Equity and Capital [Abstract]

Equity and Capital

Common Stock of the Parent Company

At the Market ("ATM") Program

Under the Parent Company's ATM equity offering program, the Parent Company may sell up to $500 million of common stock at prices determined by the market at the time of sale. There were no shares issued under the ATM equity program during the nine months ended September 30, 2018 or 2017. As of September 30, 2018, all $500 million of common stock remained available for issuance under this ATM equity program.

Share Repurchase Program

On February 7, 2018, the Company's Board authorized a common share repurchase program under which the Company may repurchase, from time to time, up to $250 million worth of shares of its outstanding common stock through open market purchases and/or in privately negotiated transactions. Any shares purchased will be retired. The program is scheduled to expire on February 6, 2020. The timing and actual number of shares repurchased under the program depend upon marketplace conditions and other factors. The program remains subject to the discretion of the Board. As of September 30, 2018, the Company had repurchased 2,145,209 shares for $125.0 million at an average price of $58.24 per share.

Subsequent Event - Transfer of Listing

On October 25, 2018, the Company's Board approved the transfer of the Company's common stock from listing on the New York Stock Exchange ("NYSE") to The NASDAQ Global Select Market ("NASDAQ"). The Company expects the last day of trading on the NYSE to be November 12, 2018. The Company's common stock has been approved for listing on NASDAQ, is expected to commence trading on November 13, 2018, and will continue to trade under the stock symbol "REG".

Common Units of the Operating Partnership

Common units of the operating partnership are issued or redeemed and retired for each of the shares of Parent Company common stock issued or repurchased and retired, as described above.

Accumulated Other Comprehensive Loss ("AOCI")

The following tables present changes in the balances of each component of AOCI:



	Controlling Interests							Noncontrolling Interests					Total
(in thousands)	Cash Flow Hedges			Unrealized gain (loss) on Available-For-Sale Debt Securities		AOCI		Cash Flow Hedges		Unrealized gain (loss) on Available-For-Sale Debt Securities	AOCI		AOCI
Balance as of December 31, 2016	$	(18,327	)	(19	)	(18,346	)	(301	)	—	(301	)	(18,647	)
Other comprehensive income before reclassifications	(3,768		)	51		(3,717	)	(143	)	—	(143	)	(3,860	)
Amounts reclassified from AOCI ⁽¹⁾	7,922			—		7,922		132		—	132		8,054
Current period other comprehensive income, net	4,154			51		4,205		(11	)	—	(11	)	4,194
Balance as of September 30, 2017	$	(14,173	)	32		(14,141	)	(312	)	—	(312	)	(14,453	)

⁽¹⁾ Amounts reclassified from AOCI into income are presented within Interest expense, net in the Consolidated Statement of Operations.

	Controlling Interests							Noncontrolling Interests					Total
(in thousands)	Cash Flow Hedges			Unrealized gain (loss) on Available-For-Sale Debt Securities		AOCI		Cash Flow Hedges		Unrealized gain (loss) on Available-For-Sale Debt Securities	AOCI		AOCI
Balance as of December 31, 2017	$	(6,262	)	(27	)	(6,289	)	(112	)	—	(112	)	(6,401	)
Opening adjustment due to change in accounting policy ⁽²⁾	12			—		12		2		—	2		14
Adjusted balance as of January 1, 2018	(6,250		)	(27	)	(6,277	)	(110	)	—	(110	)	(6,387	)
Other comprehensive income before reclassifications	15,731			(51	)	15,680		780		—	780		16,460
Amounts reclassified from AOCI ⁽¹⁾	4,663			—		4,663		38		—	38		4,701
Current period other comprehensive income, net	20,394			(51	)	20,343		818		—	818		21,161
Balance as of September 30, 2018	$	14,144		(78	)	14,066		708		—	708		14,774

⁽¹⁾ Amounts recelassified from AOCI into income are presented within Interest expense, net in the Consolidated Statement of Operations.
⁽²⁾ Upon adoption of ASU 2017-12, the Company recognized the immaterial adjustment to opening retained earnings and AOCI for previously recognized hedge ineffectiveness from off-market hedges, as further discussed in note 1.

Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation During nine months ended September 30, 2018, the Company granted 259,356 shares of restricted stock with a weighted-average grant-date fair value of $63.50 per share. The Company records stock-based compensation expense within general and administrative expenses in the accompanying Consolidated Statements of Operations.

Non-Qualified Deferred Compensation Plan

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Non-Qualified Deferred Compensation Plan

Non-Qualified Deferred Compensation Plan ("NQDCP")

The Company maintains a NQDCP which allows select employees and directors to defer part or all of their cash bonus, director fees, and vested restricted stock awards. All contributions into the participants' accounts are fully vested upon contribution to the NQDCP and are deposited in a Rabbi trust.

The following table reflects the balances of the assets and deferred compensation liabilities of the Rabbi trust and related participant account obligations in the accompanying Consolidated Balance Sheets, excluding Regency stock:



(in thousands)	September 30, 2018		December 31, 2017
Assets:
Equity securities ⁽¹⁾	$	33,907	31,662
Liabilities:
Accounts payable and other liabilities	$	33,716	31,383
⁽¹⁾ Included within Other assets in the accompanying Consolidated Balance Sheets.

Earnings per Share and Unit

9 Months Ended

Sep. 30, 2018

Earnings per Share and Unit [Abstract]

Earnings per Share and Unit

Parent Company Earnings per Share

The following summarizes the calculation of basic and diluted earnings per share:



	Three months ended September 30,			Nine months ended September 30,
(in thousands, except per share data)	2018		2017	2018		2017
Numerator:
Income from operations attributable to common stockholders - basic	$	69,722	59,666	$	170,222	74,810
Income from operations attributable to common stockholders - diluted	$	69,722	59,666	$	170,222	74,810
Denominator:
Weighted average common shares outstanding for basic EPS	169,438		170,105	169,847		155,881
Weighted average common shares outstanding for diluted EPS ⁽¹⁾	169,839		170,466	170,166		156,190

Income per common share – basic	$	0.41	0.35	$	1.00	0.48
Income per common share – diluted	$	0.41	0.35	$	1.00	0.48
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and shares issuable under the forward equity offering, that were fully settled on December 14, 2017, using the treasury stock method.

Income allocated to noncontrolling interests of the Operating Partnership has been excluded from the numerator and exchangeable Operating Partnership units have been omitted from the denominator for the purpose of computing diluted earnings per share since the effect of including these amounts in the numerator and denominator would be anti-dilutive. Weighted average exchangeable Operating Partnership units outstanding for both the three and nine months ended September 30, 2018 were 349,902, and were 349,902 and 276,503, respectively, during the same periods in 2017.

Operating Partnership Earnings per Unit

The following summarizes the calculation of basic and diluted earnings per unit:



	Three months ended September 30,			Nine months ended September 30,
(in thousands, except per share data)	2018		2017	2018		2017
Numerator:
Income from operations attributable to common unit holders - basic	$	69,869	59,798	$	170,580	75,027
Income from operations attributable to common unit holders - diluted	$	69,869	59,798	$	170,580	75,027
Denominator:
Weighted average common units outstanding for basic EPU	169,788		170,455	170,197		156,158
Weighted average common units outstanding for diluted EPU ⁽¹⁾	170,189		170,816	170,516		156,467

Income per common unit – basic	$	0.41	0.35	$	1.00	0.48
Income per common unit – diluted	$	0.41	0.35	$	1.00	0.48
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and shares issuable under the forward equity offering, that were fully settled on December 14, 2017, using the treasury stock method.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation The Company is involved in litigation on a number of matters and is subject to certain claims, which arise in the normal course of business, none of which, in the opinion of management, is expected to have a material adverse effect on the Company's consolidated financial position, results of operations, or liquidity. Legal fees are expensed as incurred. Environmental The Company is also subject to numerous environmental laws and regulations as they apply to real estate pertaining to chemicals used by the dry cleaning industry, the existence of asbestos in older shopping centers, and underground petroleum storage tanks. The Company believes that the ultimate disposition of currently known environmental matters will not have a material effect on its financial position, liquidity, or operations. The Company can give no assurance that existing environmental studies with respect to the shopping centers have revealed all potential environmental contaminants or liabilities, that any previous owner, occupant or tenant did not create any material environmental condition not known to it, that the current environmental condition of the shopping centers will not be affected by tenants and occupants, by the condition of nearby properties, or by unrelated third parties, or that changes in applicable environmental laws and regulations or their interpretation will not result in additional environmental liability to the Company. Letters of Credit The Company has the right to issue letters of credit under the Line up to an amount not to exceed $50.0 million, which reduces the credit availability under the Line. These letters of credit are primarily issued as collateral on behalf of its captive insurance program and to facilitate the construction of development projects. As of September 30, 2018 and December 31, 2017, the Company had $9.4 million in letters of credit outstanding. Purchase Commitments The Company enters into purchase and sale agreements to buy or sell real estate assets in the normal course of business, which generally provide limited recourse if either party ends the contract. At September 30, 2018, the Company has a contractual commitment to purchase up to a 100% ownership interest in an operating property valued at $205 million by November 2019, at the option of the seller. The Company currently expects the seller to require the Company to purchase a 30% interest in such property by November 2019 for approximately $61.5 million.

Organization and Principles of Consolidation (Policies)

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Consolidation, Variable Interest Entity, Policy

Real Estate Partnerships


•	Those partnerships for which the Partners only have protective rights are considered VIEs under ASC 810, Consolidation. Regency is the primary beneficiary of these VIEs as Regency has power over these partnerships and they operate primarily for the benefit of Regency. As such, Regency consolidates these entities and reports the limited partners’ interest as noncontrolling interests.


•	Those partnerships for which the partners are involved in the day to day decisions and do not have any other aspects that would cause them to be considered VIEs, are evaluated for consolidation using the voting interest model.


◦	Those partnerships in which Regency has a controlling financial interest are consolidated; and the limited partners’ ownership interest and share of net income is recorded as noncontrolling interest.

◦


◦	The net difference in the carrying amount of investments in real estate partnerships and the underlying equity in net assets is accreted to income and recorded in equity in income of investments in real estate partnerships in the accompanying Consolidated Statements of Operations over the expected useful lives of the properties and other intangible assets, which range from 10 to 40 years.

The major classes of assets, liabilities, and non-controlling equity interests held by the Company's consolidated VIEs, exclusive of the Operating Partnership as a whole, are as follows:



(in thousands)	September 30, 2018		December 31, 2017
Assets
Net real estate investments	$	163,283	172,736
Cash and cash equivalents	4,635		4,993
Liabilities
Notes payable	18,403		16,551
Equity
Limited partners’ interests in consolidated partnerships	17,263		17,572

Revenue Recognition, Services, Management Fees [Policy Text Block]

Revenues and Tenant and Other Receivables

Property and Asset Management Services

Leasing Services

Transaction Services

All income from contracts with the Company's real estate partnerships is included within Management, transaction and other fees on the Consolidated Statements of Operations, as follows:



		Three months ended September 30,			Nine months ended September 30,
(in thousands)	Timing of satisfaction of performance obligations	2018		2017	2018		2017
Property management services	Over time	$	3,588	3,446	$	11,008	10,452
Asset management services	Over time	1,840		1,762	5,347		5,314
Leasing services	Point in time	969		669	2,726		2,285
Other transaction fees	Point in time	557		170	1,918		1,302
Total management, transaction, and other fees		$	6,954	6,047	$	20,999	19,353

Real Estate Sales

Goodwill and Intangible Assets, Goodwill, Policy

Goodwill

New Accounting Pronouncements and Changes in Accounting Principles

Recent Accounting Pronouncements

The following table provides a brief description of recent accounting pronouncements and expected impact on our financial statements:



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
Recently adopted:
Accounting Standards Update ("ASU") 2017-12, August 2017, Targeted Improvements to Accounting for Hedging Activities	This ASU provides updated guidance to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. The adoption method requires the Company to recognize the cumulative effect of initially applying the ASU as an adjustment to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the update.	January 2018	The Company adopted this ASU using a modified retrospective transition method, which resulted in an immaterial adjustment to opening retained earnings and accumulated other comprehensive income for previously recognized hedge ineffectiveness from off-market hedges.

ASU 2016-01, January 2016, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This ASU amends the guidance to classify equity securities with readily-determinable fair values into different categories and requires equity securities to be measured at fair value with changes in the fair value recognized through net income. Equity investments accounted for under the equity method are not included in the scope of this amendment.	January 2018	The Company's adoption of this standard did not have a significant impact on its results of operations, financial condition or cash flows as the company has an insignificant amount of equity securities within the scope of this standard. The adoption resulted in reduced disclosure requirements around methodology and significant assumptions used in fair value measurements.

ASU 2016-15, August 2016, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments	This ASU makes eight targeted changes to how cash receipts and cash payments are presented and classified in the statement of cash flows.	January 2018	The adoption of this ASU did not result in a change to the Company's Consolidated Statements of Cash Flows.

ASU 2016-18, November 2016, Statement of Cash Flows (Topic 230): Restricted Cash	This ASU requires entities to show the changes in the total of cash, cash equivalents, restricted cash, and restricted cash equivalents in the statement of cash flows. The amendments in this ASU are applied using a retrospective transition method to each period presented.	January 2018	The adoption of this ASU resulted in a change to the classification and presentation of changes in restricted cash on its cash flow statement, which was not material. There was no change to the Company's financial condition or results of operations as a result of adopting this ASU. Upon adoption, and for the nine months ended September 30, 2017, net cash provided by operating activities increased by $1.6 million and net cash used in investing activities decreased by $1.0 million, with a corresponding increase in cash and cash equivalents and restricted cash within the Consolidated Statements of Cash Flows.



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
Not yet adopted:

Leases (Topic 842) and related updates: ASU 2016-02, February 2016, Leases (Topic 842) ASU 2018-10, July 2018: Codification Improvements to Topic 842, Leases ASU 2018-11, July 2018, Leases (Topic 842): Targeted Improvements	Topic 842 amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets. It also makes targeted changes to lessor accounting. The provisions of these ASUs are effective as of January 1, 2019, with early adoption permitted. Topic 842 provides a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief or an additional transition method, allowing for initial application at the date of adoption and a cumulative-effect adjustment to opening retained earnings.	January 2019	The Company continues to evaluate the impact this standard will have on its financial statements and related disclosures. Based on adoption and implementation efforts to date, management has identified expected changes from the new standard from its perspective as both a lessee and a lessor, as noted below:

	Lessee Accounting: The new standard establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparable period presented in the financial statements as its date of initial application. The new standard provides a number of optional practical expedients in transition. The Company expects to elect the “package of practical expedients”, which allows the Company not to reassess under the new standard prior conclusions about lease identification, lease classification, and initial direct costs. The new standard will also provide significant new disclosures about the Company’s leasing activities.		The Company has ground lease agreements in which the Company is the lessee for land beneath all or a portion of the buildings at certain consolidated shopping centers. The Company also has office leases for its headquarters and field offices. Based on current estimates, which include interest rate assumptions subject to change, the Company anticipates recognizing operating lease liabilities for its ground and office leases, with a corresponding ROU asset, of less than 5% of total assets. For these existing operating leases, the Company will continue to recognize a single lease expense for its existing ground and office operating leases, currently included in Operating and maintenance expenses and General and administrative expenses, respectively, in the Consolidated Statements of Operations. Future ground leases entered into or acquired subsequent to the adoption date may be classified as operating or finance leases, based on specific classification criteria. Finance leases would result in a slightly accelerated impact to earnings, using the effective interest method, and different classification of the expense.



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2018-15, August 2018, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract	The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The ASU provides further clarification of the appropriate presentation of capitalized costs, the period over which to recognize the expense, the presentation within the Statements of Operations and Statements of Cash Flows, and the disclosure requirements. Early adoption of the standard is permitted.	January 2020	The Company is currently evaluating the accounting standard, but does not expect the adoption to have a material impact on its financial position, results of operations, or cash flows.

ASU 2016-13, June 2016, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This ASU replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This ASU also applies to how the Company determines its allowance for doubtful accounts on tenant receivables.	January 2020	The Company is evaluating the alternative methods of adoption and the impact it will have on its financial statements and related disclosures.

ASU 2018-13, August 2018, Fair Value Measurements (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement	This ASU modifies the disclosure requirements for fair value measurements within the scope of Topic 820, Fair Value Measurement, including the removal and modification of certain existing disclosures, and the addition of new disclosures.	January 2020	The Company is currently evaluating the impact of adopting this new accounting standard, which is expected to only impact fair value measurement disclosures and therefore should have no impact on the Company's financial position, results of operations, or cash flows.

Organization and Principles of Consolidation Recent Accounting Pronouncements (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Changes and Error Corrections [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

Recent Accounting Pronouncements

The following table provides a brief description of recent accounting pronouncements and expected impact on our financial statements:



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
Recently adopted:
Accounting Standards Update ("ASU") 2017-12, August 2017, Targeted Improvements to Accounting for Hedging Activities	This ASU provides updated guidance to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. The adoption method requires the Company to recognize the cumulative effect of initially applying the ASU as an adjustment to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the update.	January 2018	The Company adopted this ASU using a modified retrospective transition method, which resulted in an immaterial adjustment to opening retained earnings and accumulated other comprehensive income for previously recognized hedge ineffectiveness from off-market hedges.

ASU 2016-01, January 2016, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This ASU amends the guidance to classify equity securities with readily-determinable fair values into different categories and requires equity securities to be measured at fair value with changes in the fair value recognized through net income. Equity investments accounted for under the equity method are not included in the scope of this amendment.	January 2018	The Company's adoption of this standard did not have a significant impact on its results of operations, financial condition or cash flows as the company has an insignificant amount of equity securities within the scope of this standard. The adoption resulted in reduced disclosure requirements around methodology and significant assumptions used in fair value measurements.

ASU 2016-15, August 2016, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments	This ASU makes eight targeted changes to how cash receipts and cash payments are presented and classified in the statement of cash flows.	January 2018	The adoption of this ASU did not result in a change to the Company's Consolidated Statements of Cash Flows.

ASU 2016-18, November 2016, Statement of Cash Flows (Topic 230): Restricted Cash	This ASU requires entities to show the changes in the total of cash, cash equivalents, restricted cash, and restricted cash equivalents in the statement of cash flows. The amendments in this ASU are applied using a retrospective transition method to each period presented.	January 2018	The adoption of this ASU resulted in a change to the classification and presentation of changes in restricted cash on its cash flow statement, which was not material. There was no change to the Company's financial condition or results of operations as a result of adopting this ASU. Upon adoption, and for the nine months ended September 30, 2017, net cash provided by operating activities increased by $1.6 million and net cash used in investing activities decreased by $1.0 million, with a corresponding increase in cash and cash equivalents and restricted cash within the Consolidated Statements of Cash Flows.



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
Not yet adopted:

Leases (Topic 842) and related updates: ASU 2016-02, February 2016, Leases (Topic 842) ASU 2018-10, July 2018: Codification Improvements to Topic 842, Leases ASU 2018-11, July 2018, Leases (Topic 842): Targeted Improvements	Topic 842 amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets. It also makes targeted changes to lessor accounting. The provisions of these ASUs are effective as of January 1, 2019, with early adoption permitted. Topic 842 provides a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief or an additional transition method, allowing for initial application at the date of adoption and a cumulative-effect adjustment to opening retained earnings.	January 2019	The Company continues to evaluate the impact this standard will have on its financial statements and related disclosures. Based on adoption and implementation efforts to date, management has identified expected changes from the new standard from its perspective as both a lessee and a lessor, as noted below:

	Lessee Accounting: The new standard establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparable period presented in the financial statements as its date of initial application. The new standard provides a number of optional practical expedients in transition. The Company expects to elect the “package of practical expedients”, which allows the Company not to reassess under the new standard prior conclusions about lease identification, lease classification, and initial direct costs. The new standard will also provide significant new disclosures about the Company’s leasing activities.		The Company has ground lease agreements in which the Company is the lessee for land beneath all or a portion of the buildings at certain consolidated shopping centers. The Company also has office leases for its headquarters and field offices. Based on current estimates, which include interest rate assumptions subject to change, the Company anticipates recognizing operating lease liabilities for its ground and office leases, with a corresponding ROU asset, of less than 5% of total assets. For these existing operating leases, the Company will continue to recognize a single lease expense for its existing ground and office operating leases, currently included in Operating and maintenance expenses and General and administrative expenses, respectively, in the Consolidated Statements of Operations. Future ground leases entered into or acquired subsequent to the adoption date may be classified as operating or finance leases, based on specific classification criteria. Finance leases would result in a slightly accelerated impact to earnings, using the effective interest method, and different classification of the expense.



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2018-15, August 2018, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract	The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The ASU provides further clarification of the appropriate presentation of capitalized costs, the period over which to recognize the expense, the presentation within the Statements of Operations and Statements of Cash Flows, and the disclosure requirements. Early adoption of the standard is permitted.	January 2020	The Company is currently evaluating the accounting standard, but does not expect the adoption to have a material impact on its financial position, results of operations, or cash flows.

ASU 2016-13, June 2016, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This ASU replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This ASU also applies to how the Company determines its allowance for doubtful accounts on tenant receivables.	January 2020	The Company is evaluating the alternative methods of adoption and the impact it will have on its financial statements and related disclosures.

ASU 2018-13, August 2018, Fair Value Measurements (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement	This ASU modifies the disclosure requirements for fair value measurements within the scope of Topic 820, Fair Value Measurement, including the removal and modification of certain existing disclosures, and the addition of new disclosures.	January 2020	The Company is currently evaluating the impact of adopting this new accounting standard, which is expected to only impact fair value measurement disclosures and therefore should have no impact on the Company's financial position, results of operations, or cash flows.

Real Estate Investments (Tables)

9 Months Ended

Sep. 30, 2018

Business Acquisition [Line Items]

Property, Plant and Equipment [Table Text Block]

The following table details the components of Land, building and improvements in the Consolidated Balance Sheets:



(in thousands)	September 30, 2018		December 31, 2017
Land	$	4,215,399	4,235,032
Land improvements	626,787		556,140
Buildings	5,126,219		4,999,378
Building and tenant improvements	885,878		787,880
Total Land, building and improvements	$	10,854,283	10,578,430

Schedule of business acquisitions

The following table details the shopping centers acquired or land acquired or leased for development:



(in thousands)		Nine months ended September 30, 2018
Date Purchased	Property Name	City/State	Property Type	Ownership	Purchase Price	Debt Assumed, Net of Premiums	Intangible Assets	Intangible Liabilities
1/2/18	Ballard Blocks I	Seattle, WA	Operating	49.9%	$54,500	—	3,668	2,350
1/2/18	Ballard Blocks II	Seattle, WA	Development	49.9%	4,000	—	—	—
1/5/18	The District at Metuchen	Metuchen, NJ	Operating	20%	33,830	—	3,147	1,905
1/10/18	Hewlett Crossing I & II	Hewlett, NY	Operating	100%	30,900	9,700	3,114	1,868
4/3/2018	Rivertowns Square	Dobbs Ferry, NY	Operating	100%	68,933	—	4,993	5,554
5/18/2018	Crossroads Commons II	Boulder, CO	Operating	20%	10,500	—	447	769
9/7/2018	Ridgewood Shopping Center	Raleigh, NC	Operating	20%	45,800	10,233	3,372	2,278
Total property acquisitions					$248,463	19,933	18,741	14,724

(in thousands)		Nine months ended September 30, 2017
Date Purchased	Property Name	City/State	Property Type	Ownership	Purchase Price	Debt Assumed, Net of Premiums	Intangible Assets	Intangible Liabilities
3/6/17	The Field at Commonwealth	Chantilly, VA	Development	100%	$9,500	—	—	—
3/8/17	Pinecrest Place ⁽¹⁾	Miami, FL	Development	100%	—	—	—	—
4/13/17	Mellody Farm ⁽²⁾	Chicago, IL	Development	100%	26,200	—	—	—
6/28/17	Concord outparcel ⁽³⁾	Miami, FL	Operating	100%	350	—	—	—
7/20/17	Aventura Square outparcel ⁽⁴⁾	Miami, FL	Operating	100%	1,750	—	90	9
Total property acquisitions					$37,800	—	90	9
⁽¹⁾ The Company leased 10.67 acres for a ground up development.
⁽²⁾ The Operating Partnership issued 195,732 partnership units valued at $13.1 million as partial consideration for the purchase.
⁽³⁾ The Company purchased a 0.67 acre vacant outparcel adjacent to the Company's existing operating Concord Shopping Plaza.
⁽⁴⁾ The Company purchased a 0.06 acre outparcel improved with a leased building adjacent to the Company's existing operating Aventura Square shopping center.

Equity One Inc. [Member]

Business Acquisition [Line Items]

Schedule of business acquisitions



(in thousands)	Final Purchase Price Allocation
Land	$	2,865,053
Building and improvements	2,619,163
Properties in development	68,744
Properties held for sale	19,600
Investments in unconsolidated real estate partnerships	99,666
Real estate assets	5,672,226
Cash, accounts receivable and other assets	112,909
Intangible assets	458,877
Goodwill	332,384
Total assets acquired	6,576,396
Notes payable	757,399
Accounts payable, accrued expenses, and other liabilities	122,217
Lease intangible liabilities	503,675
Total liabilities assumed	1,383,291
Total purchase price	$	5,193,105

The following table provides the components that made up the total purchase price for the Equity One merger:



(in thousands, except stock price)	Purchase Price
Shares of common stock issued for merger	65,379
Closing stock price on March 1, 2017	$	68.40
Value of common stock issued for merger	$	4,471,808
Other cash payments	721,297
Total purchase price	$	5,193,105

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination



(in years)		Weighted Average Amortization / Accretion Period
Assets:
In-place leases		10.8
Above-market leases		7.8
Below-market ground leases		55.3
Liabilities:
Below-market leases		24.9

Business Acquisition, Pro Forma Information

Pro forma Information



	Three months ended September 30,		Nine months ended September 30,
(in thousands, except per share data)	2017		2017
Total revenues	$	262,708	$	788,345
Income from operations⁽¹⁾	63,537		190,112
Net income attributable to common stockholders ⁽¹⁾	59,621		171,795
Income per common share - basic	0.35		1.01
Income per common share - diluted	0.35		1.01
⁽¹⁾The pro forma earnings for the three and nine months ended September 30, 2017, were adjusted to exclude $1.2 million and $98.5 million of merger costs, respectively, as if they had occurred in 2016.

Property Dispositions (Tables)

9 Months Ended

Sep. 30, 2018

Discontinued Operations and Disposal Groups [Abstract]

Schedule of properties disposed of

The following table provides a summary of consolidated shopping centers and land parcels disposed of during the periods set forth below:



	Three months ended September 30,					Nine months ended September 30,
(in thousands, except number sold data)	2018			2017		2018			2017
Net proceeds from sale of real estate investments	$	108,634		167		$	151,142		15,397
Gain on sale of real estate, net of tax	$	3,228		131		$	4,448		4,913
Provision for impairment of real estate sold	$	855		—		$	29,443		—
Number of operating properties sold	3			—		7			1
Number of land parcels sold	3			—		6			7
Percent interest sold	100		%	—	%	100		%	100	%

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721659-107760

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721665-107760

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Other Assets Other Assets (Tables)

9 Months Ended

Sep. 30, 2018

Other Assets [Abstract]

Schedule of Other Assets [Table Text Block]

The following table represents the components of Other assets in the accompanying Consolidated Balance Sheets:



(in thousands)	September 30, 2018		December 31, 2017
Goodwill	$	318,710	331,884
Investments	44,014		41,636
Prepaid and other	24,093		30,332
Derivative assets	26,802		14,515
Furniture, fixtures, and equipment, net	6,715		6,123
Deferred financing costs, net	7,392		2,637
Total other assets	$	427,726	427,127

Schedule of Goodwill [Table Text Block]

The following table presents the goodwill balances and activity during the year to date periods ended:



(in thousands)	September 30, 2018			December 31, 2017
Beginning of year balance	$	331,884		—
Goodwill resulting from Equity One merger	500			331,884
Goodwill allocated to Gain on sale of real estate	(2,525		)	—
Goodwill allocated to Provision for impairment	(9,220		)	—
Goodwill allocated to properties held for sale	(1,929		)	—
End of period balance	$	318,710		331,884

Notes Payable and Unsecured Credit Facilities (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Debt

The Company’s outstanding debt consisted of the following:



(in thousands)	Weighted Average Contractual Rate	Weighted Average Effective Rate	September 30, 2018			December 31, 2017
Notes payable:
Fixed rate mortgage loans	4.8%	4.3%	$	406,072		520,193
Variable rate mortgage loans	3.3%	3.6%	127,796		⁽¹⁾	125,866
Fixed rate unsecured public and private debt	4.0%	4.4%	2,474,724			2,325,656
Total notes payable			3,008,592			2,971,715
Unsecured credit facilities:
Line of Credit (the "Line") ⁽²⁾	2.9%	3.1%	145,000			60,000
Term loans	2.4%	2.5%	563,616			563,262
Total unsecured credit facilities			708,616			623,262
Total debt outstanding			$	3,717,208		3,594,977

⁽¹⁾ Includes five mortgages whose interest rates vary on LIBOR based formulas. Three of these variable rate loans have interest rate swaps in place to fix the interest rates at a range of 2.8% to 4.1%.
⁽²⁾ Weighted average effective and contractual rate for the Line is calculated based on a fully drawn Line balance.

Schedule of maturities of long-term debt

As of September 30, 2018, scheduled principal payments and maturities on notes payable and unsecured credit facilities were as follows:



(in thousands)	September 30, 2018
Scheduled Principal Payments and Maturities by Year:	Scheduled Principal Payments		Mortgage Loan Maturities	Unsecured Maturities ⁽¹⁾		Total
2018	$	2,196	—	—		2,196
2019	9,519		13,216	—		22,735
2020	11,287		78,580	300,000		389,867
2021	11,600		77,060	250,000		338,660
2022	11,799		5,848	710,000		727,647
Beyond 5 Years	37,056		269,217	1,950,000		2,256,273
Unamortized debt premium/(discount) and issuance costs	—		6,490	(26,660	)	(20,170	)
Total	$	83,457	450,411	3,183,340		3,717,208

⁽¹⁾ Includes unsecured public and private debt and unsecured credit facilities.

Derivatives (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of derivative instruments

The following table summarizes the terms and fair values of the Company's derivative financial instruments, as well as their classification on the Consolidated Balance Sheets:



						Fair Value
(in thousands)						Assets (Liabilities)⁽¹⁾
Effective Date	Maturity Date	Notional Amount		Counterparty Pays Variable Rate of	Regency Pays Fixed Rate of	September 30, 2018		December 31, 2017
4/3/17	12/2/20	$	300,000	1 Month LIBOR with Floor	1.824%	$	6,410	1,804
8/1/16	1/5/22	265,000		1 Month LIBOR with Floor	1.053%	15,286		10,744
4/7/16	4/1/23	20,000		1 Month LIBOR	1.303%	1,310		801
12/1/16	11/1/23	33,000		1 Month LIBOR	1.490%	2,151		1,166
6/2/17	6/2/27	37,500		1 Month LIBOR with Floor	2.366%	1,645		(177	)
						$	26,802	14,338

⁽¹⁾ Derivatives in an asset position are included within Other assets in the accompanying Consolidated Balance Sheets, while those in a liability position are included within Accounts payable and other liabilities.

Derivative Instruments, Gain (Loss)

The following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements:



Location and Amount of Gain (Loss) Recognized in OCI on Derivative					Location and Amount of Gain (Loss) Reclassified from AOCI into Income						Total Interest Expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded
	Three months ended September 30,					Three months ended September 30,						Three months ended September 30,
(in thousands)	2018		2017			2018			2017			2018		2017
Interest rate swaps	$	2,717	(39	)	Interest expense	$	(1,148	)	(2,329	)	Interest expense, net	$	36,618	34,679

Location and Amount of Gain (Loss) Recognized in OCI on Derivative					Location and Amount of Gain (Loss) Reclassified from AOCI into Income						Total Interest Expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded
	Nine months ended September 30,					Nine months ended September 30,						Nine months ended September 30,
(in thousands)	2018		2017			2018			2017			2018		2017
Interest rate swaps	$	16,511	(3,911	)	Interest expense	$	(4,701	)	(8,054	)	Interest expense, net	$	111,477	97,285

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Summary of balance sheet fair values



	September 30, 2018			December 31, 2017
(in thousands)	Carrying Amount		Fair Value	Carrying Amount		Fair Value
Financial assets:
Notes receivable	$	—	—	$	15,803	15,660
Financial liabilities:
Notes payable	$	3,008,592	2,952,604	$	2,971,715	3,058,044
Unsecured credit facilities	$	708,616	710,000	$	623,262	625,000

Summary of assets measured on recurring basis

The following tables present the placement in the fair value hierarchy of assets and liabilities that are measured at fair value on a recurring basis:



	Fair Value Measurements as of September 30, 2018
(in thousands)			Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs	Significant Unobservable Inputs
Assets:	Balance		(Level 1)	(Level 2)	(Level 3)
Securities	$	36,027	36,027	—	—
Available-for-sale debt securities	7,987		—	7,987	—
Interest rate derivatives	26,802		—	26,802	—
Total	$	70,816	36,027	34,789	—



	Fair Value Measurements as of December 31, 2017
(in thousands)				Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs		Significant Unobservable Inputs
Assets:	Balance			(Level 1)	(Level 2)		(Level 3)
Securities	$	31,662		31,662	—		—
Available-for-sale debt securities	9,974			—	9,974		—
Interest rate derivatives	14,515			—	14,515		—
Total	$	56,151		31,662	24,489		—

Liabilities:
Interest rate derivatives	$	(177	)	—	(177	)	—

Fair Value Measurements, Nonrecurring [Table Text Block]



	Fair Value Measurements as of December 31, 2017
(in thousands)				Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs		Significant Unobservable Inputs
Assets:	Balance			(Level 1)	(Level 2)		(Level 3)
Securities	$	31,662		31,662	—		—
Available-for-sale debt securities	9,974			—	9,974		—
Interest rate derivatives	14,515			—	14,515		—
Total	$	56,151		31,662	24,489		—

Liabilities:
Interest rate derivatives	$	(177	)	—	(177	)	—

Equity and Capital (Tables)

9 Months Ended

Sep. 30, 2018

Equity and Capital [Abstract]

Summary of accumulated other comprehensive loss

The following tables present changes in the balances of each component of AOCI:



	Controlling Interests							Noncontrolling Interests					Total
(in thousands)	Cash Flow Hedges			Unrealized gain (loss) on Available-For-Sale Debt Securities		AOCI		Cash Flow Hedges		Unrealized gain (loss) on Available-For-Sale Debt Securities	AOCI		AOCI
Balance as of December 31, 2016	$	(18,327	)	(19	)	(18,346	)	(301	)	—	(301	)	(18,647	)
Other comprehensive income before reclassifications	(3,768		)	51		(3,717	)	(143	)	—	(143	)	(3,860	)
Amounts reclassified from AOCI ⁽¹⁾	7,922			—		7,922		132		—	132		8,054
Current period other comprehensive income, net	4,154			51		4,205		(11	)	—	(11	)	4,194
Balance as of September 30, 2017	$	(14,173	)	32		(14,141	)	(312	)	—	(312	)	(14,453	)

⁽¹⁾ Amounts reclassified from AOCI into income are presented within Interest expense, net in the Consolidated Statement of Operations.

	Controlling Interests							Noncontrolling Interests					Total
(in thousands)	Cash Flow Hedges			Unrealized gain (loss) on Available-For-Sale Debt Securities		AOCI		Cash Flow Hedges		Unrealized gain (loss) on Available-For-Sale Debt Securities	AOCI		AOCI
Balance as of December 31, 2017	$	(6,262	)	(27	)	(6,289	)	(112	)	—	(112	)	(6,401	)
Opening adjustment due to change in accounting policy ⁽²⁾	12			—		12		2		—	2		14
Adjusted balance as of January 1, 2018	(6,250		)	(27	)	(6,277	)	(110	)	—	(110	)	(6,387	)
Other comprehensive income before reclassifications	15,731			(51	)	15,680		780		—	780		16,460
Amounts reclassified from AOCI ⁽¹⁾	4,663			—		4,663		38		—	38		4,701
Current period other comprehensive income, net	20,394			(51	)	20,343		818		—	818		21,161
Balance as of September 30, 2018	$	14,144		(78	)	14,066		708		—	708		14,774

⁽¹⁾ Amounts recelassified from AOCI into income are presented within Interest expense, net in the Consolidated Statement of Operations.
⁽²⁾ Upon adoption of ASU 2017-12, the Company recognized the immaterial adjustment to opening retained earnings and AOCI for previously recognized hedge ineffectiveness from off-market hedges, as further discussed in note 1.

Non-Qualified Deferred Compensation Plan (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Deferred Compensation Arrangement with Individual Disclosure, Postretirement Benefits [Table Text Block]



(in thousands)	September 30, 2018		December 31, 2017
Assets:
Equity securities ⁽¹⁾	$	33,907	31,662
Liabilities:
Accounts payable and other liabilities	$	33,716	31,383
⁽¹⁾ Included within Other assets in the accompanying Consolidated Balance Sheets.

Earnings per Share and Unit (Tables)

9 Months Ended

Sep. 30, 2018

Parent Company [Member]

Schedule of earnings per share

The following summarizes the calculation of basic and diluted earnings per share:



	Three months ended September 30,			Nine months ended September 30,
(in thousands, except per share data)	2018		2017	2018		2017
Numerator:
Income from operations attributable to common stockholders - basic	$	69,722	59,666	$	170,222	74,810
Income from operations attributable to common stockholders - diluted	$	69,722	59,666	$	170,222	74,810
Denominator:
Weighted average common shares outstanding for basic EPS	169,438		170,105	169,847		155,881
Weighted average common shares outstanding for diluted EPS ⁽¹⁾	169,839		170,466	170,166		156,190

Income per common share – basic	$	0.41	0.35	$	1.00	0.48
Income per common share – diluted	$	0.41	0.35	$	1.00	0.48
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and shares issuable under the forward equity offering, that were fully settled on December 14, 2017, using the treasury stock method.

Partnership Interest [Member]

Schedule of earnings per share

The following summarizes the calculation of basic and diluted earnings per unit:



	Three months ended September 30,			Nine months ended September 30,
(in thousands, except per share data)	2018		2017	2018		2017
Numerator:
Income from operations attributable to common unit holders - basic	$	69,869	59,798	$	170,580	75,027
Income from operations attributable to common unit holders - diluted	$	69,869	59,798	$	170,580	75,027
Denominator:
Weighted average common units outstanding for basic EPU	169,788		170,455	170,197		156,158
Weighted average common units outstanding for diluted EPU ⁽¹⁾	170,189		170,816	170,516		156,467

Income per common unit – basic	$	0.41	0.35	$	1.00	0.48
Income per common unit – diluted	$	0.41	0.35	$	1.00	0.48
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and shares issuable under the forward equity offering, that were fully settled on December 14, 2017, using the treasury stock method.

Organization and Principles of Consolidation (Details)	9 Months Ended
Organization and Principles of Consolidation (Details)	Sep. 30, 2018 retail_shopping_center
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Document Period End Date	Sep. 30, 2018
Operations commenced date	Dec. 31, 1993
Wholly Owned Properties [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Real Estate Properties	306
Unconsolidated Properties [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Real Estate Properties	120
Parent Company [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership percentage of outstanding common partnership units	99.80%

Organization and Principles of Consolidation Variable Interest Entities (Details)

9 Months Ended

Sep. 30, 2018

retail_shopping_center

Accounting Policies [Abstract]

Schedule of Variable Interest Entities

The major classes of assets, liabilities, and non-controlling equity interests held by the Company's consolidated VIEs, exclusive of the Operating Partnership as a whole, are as follows:



(in thousands)	September 30, 2018		December 31, 2017
Assets
Net real estate investments	$	163,283	172,736
Cash and cash equivalents	4,635		4,993
Liabilities
Notes payable	18,403		16,551
Equity
Limited partners’ interests in consolidated partnerships	17,263		17,572

Variable Interest Entity [Line Items]

Document Period End Date

Sep. 30, 2018

Minimum [Member]

Variable Interest Entity [Line Items]

Equity Method Investment, Accretion Period

10 years

Maximum [Member]

Variable Interest Entity [Line Items]

Equity Method Investment, Accretion Period

40 years

Partially Owned Properties [Member]

Variable Interest Entity [Line Items]

Number of Real Estate Properties

131

Consolidated Properties [Member]

Variable Interest Entity [Line Items]

Number of Real Estate Properties

Organization and Principles of Consolidation Revenues and Tenant and Other Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Management, transaction, and other fee [Member]
Schedule of management, transaction, and other fees [Line Items]
Accounts Receivable, Net	$ 10,100		$ 10,100
Parent Company [Member]
Schedule of management, transaction, and other fees [Line Items]
Property Management Fee Revenue	6,954	$ 6,047	20,999	$ 19,353
Accounts Receivable, Net	160,709		160,709		$ 170,985
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets					30,903
Parent Company [Member] \| Property management services [Member]
Schedule of management, transaction, and other fees [Line Items]
Property Management Fee Revenue	3,588	3,446	11,008	10,452
Parent Company [Member] \| Asset management services [Member]
Schedule of management, transaction, and other fees [Line Items]
Property Management Fee Revenue	1,840	1,762	5,347	5,314
Parent Company [Member] \| Leasing services [Member]
Schedule of management, transaction, and other fees [Line Items]
Property Management Fee Revenue	969	669	2,726	2,285
Parent Company [Member] \| Other transaction fees [Member]
Schedule of management, transaction, and other fees [Line Items]
Property Management Fee Revenue	557	$ 170	1,918	$ 1,302
Parent Company [Member] \| Management, transaction, and other fee [Member]
Schedule of management, transaction, and other fees [Line Items]
Accounts Receivable, Net					$ 8,700
Accounting Standards Update 2017-05 [Member]
Schedule of management, transaction, and other fees [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 30,900		$ 30,900

Organization and Principles of Consolidation Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounting Standards Update 2017-05 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 30,900
Salaries expense [Member] \| Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	4,900	$ 10,400
Legal expense [Member] \| Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	1,200	$ 1,200
Operating Activities [Member] \| Accounting Standards Update 2016-18 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	1,600
Investing Activities [Member] \| Accounting Standards Update 2016-18 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 1,000

Real Estate Investments Land, buildings, and improvements (Details) - Parent Company [Member] - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Land	$ 4,215,399	$ 4,235,032
Land Improvements	626,787	556,140
Buildings	5,126,219	4,999,378
Building improvements	885,878	787,880
Property, Plant and Equipment, Gross	$ 10,854,283	$ 10,578,430

Real Estate Investments Business Acquisitions (Details) shares in Thousands, $ in Thousands		9 Months Ended
	Mar. 01, 2017 USD ($) property shares	Sep. 30, 2018 USD ($) shares	Sep. 30, 2017 USD ($)
Business Acquisition [Line Items]
Purchase Price		$ 248,463	$ 37,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		$ 19,933	0
Parent Company [Member]
Business Acquisition [Line Items]
Conversion of Stock, Conversion Ratio		0.45
Shares of common stock issued for merger (in shares) \| shares		65,500
Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		$ 18,741	90
Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 14,724	$ 9
Ballard Blocks I [Member]
Business Acquisition [Line Items]
Date Purchased		Jan. 02, 2018
Property Name		Ballard Blocks I
City/State		Seattle, WA
Business Acquisition, Percentage of Voting Interests Acquired		49.90%
Purchase Price		$ 54,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0
Ballard Blocks I [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		3,668
Ballard Blocks I [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 2,350
Ballard Blocks II [Member]
Business Acquisition [Line Items]
Date Purchased		Jan. 02, 2018
Property Name		Ballard Blocks II
City/State		Seattle, WA
Business Acquisition, Percentage of Voting Interests Acquired		49.90%
Purchase Price		$ 4,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0
Ballard Blocks II [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		0
Ballard Blocks II [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 0
Metuchen [Member]
Business Acquisition [Line Items]
Date Purchased		Jan. 05, 2018
Property Name		The District at Metuchen
City/State		Metuchen, NJ
Business Acquisition, Percentage of Voting Interests Acquired		20.00%
Purchase Price		$ 33,830
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0
Metuchen [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		3,147
Metuchen [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 1,905
Hewlett Crossing I & II [Member]
Business Acquisition [Line Items]
Date Purchased		Jan. 10, 2018
Property Name		Hewlett Crossing I & II
City/State		Hewlett, NY
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Purchase Price		$ 30,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		9,700
Hewlett Crossing I & II [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		3,114
Hewlett Crossing I & II [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 1,868
Rivertowns [Member]
Business Acquisition [Line Items]
Date Purchased		Apr. 03, 2018
Property Name		Rivertowns Square
City/State		Dobbs Ferry, NY
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Purchase Price		$ 68,933
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0
Rivertowns [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		4,993
Rivertowns [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 5,554
Crossroad Commons II [Member]
Business Acquisition [Line Items]
Date Purchased		May 18, 2018
Property Name		Crossroads Commons II
City/State		Boulder, CO
Business Acquisition, Percentage of Voting Interests Acquired		20.00%
Purchase Price		$ 10,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0
Crossroad Commons II [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		447
Crossroad Commons II [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 769
Ridgewood [Member]
Business Acquisition [Line Items]
Date Purchased		Sep. 07, 2018
Property Name		Ridgewood Shopping Center
City/State		Raleigh, NC
Business Acquisition, Percentage of Voting Interests Acquired		20.00%
Purchase Price		$ 45,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		10,233
Ridgewood [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets		3,372
Ridgewood [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 2,278
The Field at Commonwealth [Member]
Business Acquisition [Line Items]
Date Purchased			Mar. 06, 2017
Property Name			The Field at Commonwealth
City/State			Chantilly, VA
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Purchase Price			$ 9,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			0
The Field at Commonwealth [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets			0
The Field at Commonwealth [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets			$ 0
Pinecrest Place [Member] [Member]
Business Acquisition [Line Items]
Date Purchased			Mar. 08, 2017
Property Name			Pinecrest Place (1)
City/State			Miami, FL
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Purchase Price			$ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			0
Pinecrest Place [Member] [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets			0
Pinecrest Place [Member] [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets			$ 0
Mellody Farm [Member]
Business Acquisition [Line Items]
Date Purchased			Apr. 13, 2017
Property Name			Mellody Farm (2)
City/State			Chicago, IL
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Purchase Price			$ 26,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			0
Mellody Farm [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets			0
Mellody Farm [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets			$ 0
Klahanie Shopping Center [Member]
Business Acquisition [Line Items]
Date Purchased			Jun. 28, 2017
Property Name			Concord outparcel (3)
City/State			Miami, FL
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Purchase Price			$ 350
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			0
Klahanie Shopping Center [Member] \| Off-Market Favorable Lease [Member]
Business Acquisition [Line Items]
Intangible assets			0
Klahanie Shopping Center [Member] \| Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets			$ 0
Aventura Square [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Equity One Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ 1,383,291
Intangible assets	$ 458,877
Shares of common stock issued for merger (in shares) \| shares	65,379
Number of real estate properties acquired \| property	121
Equity One Inc. [Member] \| Partially Owned Properties [Member]
Business Acquisition [Line Items]
Number of real estate properties acquired \| property	8

Real Estate Investments Total Purchase Price (Details) - Equity One Inc. [Member] $ / shares in Units, shares in Thousands, $ in Thousands	Mar. 01, 2017 USD ($) $ / shares shares
Business Acquisition [Line Items]
Shares of common stock issued for merger (in shares) \| shares	65,379
Closing stock price (in usd per share) \| $ / shares	$ 68.40
Value of common stock issued for merger	$ 4,471,808
Other cash payments	721,297
Total purchase price	$ 5,193,105

Real Estate Investments Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Mar. 01, 2017
Business Acquisition [Line Items]
Total liabilities assumed	$ 19,933	$ 0
Equity One Inc. [Member]
Business Acquisition [Line Items]
Land			$ 2,865,053
Building and improvements			2,619,163
Properties in development			68,744
Properties held for sale			19,600
Investments in unconsolidated real estate partnerships			99,666
Real estate assets			5,672,226
Cash, accounts receivable and other assets			112,909
Intangible assets			458,877
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			332,384
Total assets acquired			6,576,396
Notes payable			757,399
Accounts payable, accrued expenses, and other liabilities			122,217
Lease intangible liabilities			503,675
Total liabilities assumed			1,383,291
Total purchase price			$ 5,193,105

Real Estate Investments Acquired Finite-Lived Intangibles Acquired as Part of a Business Combination (Details) - Equity One Inc. [Member]	Mar. 01, 2017
Leases, Acquired-in-Place [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years 9 months 18 days
Above Market Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 9 months 18 days
Below Market Ground Rent Lease [Member] [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	55 years 3 months 18 days

Real Estate Investments Business Acquisitions, Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Business Acquisition, Pro Forma Information [Line Items]
Business Acquisition, Pro Forma Revenue	$ 262,708	$ 788,345
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax	63,537	190,112
Business Acquisition, Pro Forma Net Income (Loss)	$ 59,621	$ 171,795
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 0.0035	$ 0.0101
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 0.0035	$ 0.0101

Property Dispositions (Details) $ in Thousands	3 Months Ended		9 Months Ended
Property Dispositions (Details) $ in Thousands	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) property	Sep. 30, 2017 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of real estate investments			$ 151,142	$ 15,397
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes			4,448	4,913
Provision for impairment, net of tax			$ 29,443	$ 0
Wholly Owned Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest			100.00%	100.00%
Parent Company [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of real estate investments			$ 151,142	$ 13,323
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	$ 3,228	$ 131	4,448	4,913
Provision for impairment, net of tax	$ 855	$ 0	$ 29,443	$ 0
Operating Segments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Real Estate Properties Sold \| property			7	1
Land [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Real Estate Properties Sold \| property			6	7

Other Assets Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Current Assets [Line Items]
Goodwill	$ 318,710	$ 331,884	$ 0
Investments	44,014	41,636
Other Prepaid Expense, Current	24,093	30,332
Derivative Asset	26,802	14,515
Furniture and Fixtures, Gross	6,715	6,123
Deferred Costs and Other Assets	7,392	2,637
Parent Company [Member]
Other Current Assets [Line Items]
Other Assets	$ 427,726	$ 427,127

Other Assets Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
Other Assets Goodwill (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill	$ 318,710		$ 331,884	$ 0
Goodwill, Other Increase (Decrease)	(2,525)		0
Goodwill, Impairment Loss	(9,220)		0
Goodwill, Written off Related to Sale of Business Unit	1,929		0
Impairment of Real Estate	29,443	$ 0
Equity One Inc. [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	$ 500
Goodwill, Acquired During Period			$ 331,884

Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt	$ 3,717,208	$ 3,594,977
Fixed Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Long-term Debt	406,072	520,193
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Long-term Debt	3,008,592	2,971,715
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total credit facilities	708,616	623,262
Long-term Debt	2,474,724	2,325,656
Line of Credit [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total credit facilities	145,000	60,000
Term Loan [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total credit facilities	563,616	563,262
London Interbank Offered Rate (LIBOR) [Member] \| Variable Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 127,796	$ 125,866
Contractual Rate [Member] \| Fixed Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.80%
Contractual Rate [Member] \| Variable Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.30%
Contractual Rate [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.00%
Contractual Rate [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.90%
Contractual Rate [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.40%
Effective Rate [Member] \| Fixed Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.30%
Effective Rate [Member] \| Variable Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.60%
Effective Rate [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.40%
Effective Rate [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.10%
Effective Rate [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.50%

Notes Payable and Unsecured Credit Facilities Schedule of maturities of long-term debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	$ 2,196
Long-term Debt, Maturities, Repayments of Principal in Year Two	22,735
Long-term Debt, Maturities, Repayments of Principal in Year Three	389,867
Long-term Debt, Maturities, Repayments of Principal in Year Four	338,660
Long-term Debt, Maturities, Repayments of Principal in Year Five	727,647
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,256,273
Debt Instrument, Unamortized Discount (Premium), Net	20,170
Long-term Debt	3,717,208	$ 3,594,977
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	2,474,724	$ 2,325,656
Scheduled Principal Payments [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	2,196
Long-term Debt, Maturities, Repayments of Principal in Year Two	9,519
Long-term Debt, Maturities, Repayments of Principal in Year Three	11,287
Long-term Debt, Maturities, Repayments of Principal in Year Four	11,600
Long-term Debt, Maturities, Repayments of Principal in Year Five	11,799
Long-term Debt, Maturities, Repayments of Principal after Year Five	37,056
Debt Instrument, Unamortized Discount (Premium), Net	0
Long-term Debt	83,457
Mortgage Loan Maturities [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	13,216
Long-term Debt, Maturities, Repayments of Principal in Year Three	78,580
Long-term Debt, Maturities, Repayments of Principal in Year Four	77,060
Long-term Debt, Maturities, Repayments of Principal in Year Five	5,848
Long-term Debt, Maturities, Repayments of Principal after Year Five	269,217
Debt Instrument, Unamortized Discount (Premium), Net	(6,490)
Long-term Debt	450,411
Unsecured Maturities [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	300,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	250,000
Long-term Debt, Maturities, Repayments of Principal in Year Five	710,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	1,950,000
Debt Instrument, Unamortized Discount (Premium), Net	26,660
Long-term Debt	$ 3,183,340

Notes Payable and Unsecured Credit Facilities Narrative (Details) ratio in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)	Apr. 02, 2018 USD ($)	Mar. 09, 2018 USD ($)
Debt Instrument [Line Items]
Repayments of Lines of Credit	$ 60.0
Senior Notes [Member] \| Notes Due March 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 300.0
Debt Instrument, Interest Rate, Stated Percentage			0.00%
Debt Instrument, Discount Percent			0.0
Senior Notes [Member] \| Notes Due June 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 150.0
Debt Instrument, Interest Rate, Stated Percentage		0.00%
Notes Payable to Banks [Member] \| 150M 6% Notes [Member]
Debt Instrument [Line Items]
Repayments of Unsecured Debt	163.2
Accordion Feature [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Increase in Capacity	1,250.0
Mortgage Loan Maturities [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Year Two	$ 13.2

Derivatives (Details) - USD ($)	3 Months Ended		9 Months Ended
Derivatives (Details) - USD ($)	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 2,717,000	$ (39,000)	$ 16,511,000	$ (3,911,000)
Amount reclassified from accumulated other comprehensive loss	(1,148,000)	(2,329,000)	(4,701,000)	(8,054,000)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 600,000
Derivative $300M Term [Member]
Derivative [Line Items]
Derivative, Inception Date			Apr. 03, 2017
Derivative, Maturity Date			Dec. 02, 2020
Derivative, Notional Amount	$ 300,000,000		$ 300,000,000
Derivative, Description of Variable Rate Basis			1 Month LIBOR with Floor
Derivative, Fixed Interest Rate	1.824%		1.824%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (6,410,000)		$ (6,410,000)		$ (1,804,000)
Derivatives 200K @ 1.04770% and 65K @ 1.07000% [Member] [Domain]
Derivative [Line Items]
Derivative, Inception Date			Aug. 01, 2016
Derivative, Maturity Date			Jan. 05, 2022
Derivative, Notional Amount	$ 265,000,000		$ 265,000,000
Derivative, Description of Variable Rate Basis			1 Month LIBOR with Floor
Derivative, Fixed Interest Rate	1.053%		1.053%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (15,286,000)		$ (15,286,000)		(10,744,000)
Derivative @ 1.30250% 20.0M [Member]
Derivative [Line Items]
Derivative, Inception Date			Apr. 07, 2016
Derivative, Maturity Date			Apr. 01, 2023
Derivative, Notional Amount	$ 20,000,000		$ 20,000,000
Derivative, Description of Variable Rate Basis			1 Month LIBOR
Derivative, Fixed Interest Rate	1.3025%		1.3025%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (1,310,000)		$ (1,310,000)		(801,000)
Derivative $33M Swap [Member]
Derivative [Line Items]
Derivative, Inception Date			Dec. 01, 2016
Derivative, Maturity Date			Nov. 01, 2023
Derivative, Notional Amount	$ 33,000,000		$ 33,000,000
Derivative, Description of Variable Rate Basis			1 Month LIBOR
Derivative, Fixed Interest Rate	1.49%		1.49%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (2,151,000)		$ (2,151,000)		(1,166,000)
Derivative @ 2.36600% 37.5K [Member] [Domain]
Derivative [Line Items]
Derivative, Inception Date			Jun. 02, 2017
Derivative, Maturity Date			Jun. 02, 2027
Derivative, Notional Amount	$ 37,500,000		$ 37,500,000
Derivative, Description of Variable Rate Basis			1 Month LIBOR with Floor
Derivative, Fixed Interest Rate	2.366%		2.366%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (1,645,000)		$ (1,645,000)
Interest Rate Cash Flow Hedge Liability at Fair Value					177,000
Swap [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			7,900,000
Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	(26,802,000)		(26,802,000)		(14,515,000)
Interest Rate Cash Flow Hedge Liability at Fair Value					177,000
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	(26,802,000)		(26,802,000)		(14,515,000)
Interest Rate Cash Flow Hedge Liability at Fair Value					177,000
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	26,802,000		26,802,000		$ 14,338,000
Parent Company [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	2,717,000	(39,000)	16,511,000	(3,911,000)
Interest Expense	$ 36,618,000	$ 34,679,000	$ 111,477,000	$ 97,285,000

Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes receivable	$ 0	$ 15,803
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	36,027	31,662
Available-for-sale Securities	7,987	9,974
Interest Rate Derivative Assets, at Fair Value	26,802	14,515
Total	70,816	56,151
Derivative instruments, at fair value		(177)
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	36,027	31,662
Available-for-sale Securities	0	0
Interest Rate Derivative Assets, at Fair Value	0	0
Total	36,027	31,662
Derivative instruments, at fair value		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Payable, Fair Value	2,952,604	3,058,044
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Available-for-sale Securities	7,987	9,974
Interest Rate Derivative Assets, at Fair Value	26,802	14,515
Total	34,789	24,489
Derivative instruments, at fair value		(177)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Receivable, Fair Value	0	15,660
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Available-for-sale Securities	0	0
Interest Rate Derivative Assets, at Fair Value	0	0
Total	0	0
Derivative instruments, at fair value		0
Unsecured Credit Facilities [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured credit facilities, Fair Value	710,000	625,000
Parent Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	3,008,592	2,971,715
Unsecured credit facilities	$ 708,616	$ 623,262

Equity and Capital Equity and Capital - Common Stock (Details)	9 Months Ended
	Sep. 30, 2018 USD ($) shares
Class of Stock [Line Items]
Stock Repurchase Program Expiration Date	Feb. 06, 2020
Maximum [Member]
Class of Stock [Line Items]
Equity Issuances, Common Shares Authorized for Issuance \| shares	500,000,000
Parent Company [Member] \| Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Shares \| shares	2,145,209
Stock Repurchased and Retired During Period, Value	$ (124,989,000)
Parent Company [Member] \| Common Stock [Member] \| Accumulated Other Comprehensive Income (Loss) [Member]
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Value	0
Parent Company [Member] \| Common Stock [Member] \| Average share price [Member]
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Value	$ (58.24)

Equity and Capital - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 12
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	$ 15,731	$ (3,768)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,262)	(18,327)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	4,663	7,922
Current period other comprehensive income, net	20,394	4,154
Ending balance	14,144	(14,173)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(51)	51
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(27)	(19)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Current period other comprehensive income, net	(51)	51
Ending balance	(78)	32
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			12
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	15,680	(3,717)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,289)	(18,346)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	4,663	7,922
Current period other comprehensive income, net	20,343	4,205
Ending balance	14,066	(14,141)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	780	(143)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(112)	(301)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	38	132
Current period other comprehensive income, net	818	(11)
Ending balance	708	(312)
Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Current period other comprehensive income, net	0	0
Ending balance	0	0
AOCI Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	780	(143)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(112)	(301)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	38	132
Current period other comprehensive income, net	818	(11)
Ending balance	708	(312)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 14
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	16,460	(3,860)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,401)	(18,647)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	4,701	8,054
Current period other comprehensive income, net	21,161	4,194
Ending balance	14,774	$ (14,453)
Accounting Standards Update 2017-12 [Member] \| Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,250)
Accounting Standards Update 2017-12 [Member] \| Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(27)
Accounting Standards Update 2017-12 [Member] \| Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,277)
Accounting Standards Update 2017-12 [Member] \| Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(110)
Accounting Standards Update 2017-12 [Member] \| Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	0
Accounting Standards Update 2017-12 [Member] \| AOCI Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(110)
Accounting Standards Update 2017-12 [Member] \| AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	$ (6,387)

Stock-Based Compensation (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted \| shares	259,356
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 63.50

Non-Qualified Deferred Compensation Plan (Details) - Parent Company [Member] - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred Compensation Plan Assets	$ 33,907	$ 31,662
Deferred Compensation Liability, Current and Noncurrent	$ 33,716	$ 31,383

Earnings per Share and Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income per common unit - diluted
Weighted Average Limited Partnership Units Outstanding, Basic		349,902		276,503
Parent Company [Member]
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 69,722	$ 59,666	$ 170,222	$ 74,810
Weighted average common units outstanding for basic EPU (in shares)	169,438,000	170,105,000	169,847,000	155,881,000
Weighted average common units outstanding for diluted EPU (in shares)	169,839,000	170,466,000	170,166,000	156,190,000
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48
Partnership Interest [Member]
Earnings Per Share [Abstract]
Weighted average common units outstanding for basic EPU (in shares)	169,788,000	170,455,000	170,197,000	156,158,000
Weighted average common units outstanding for diluted EPU (in shares)	170,189,000	170,816,000	170,516,000	156,467,000
Income per common unit - basic
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48
Income per common unit - diluted
Continuing operations (in dollars per share)	$ 0.41	$ 0.35	$ 1.00	$ 0.48
Continuing Operations [Member] \| Parent Company [Member]
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 69,722	$ 59,666	$ 170,222	$ 74,810
Net income for common stock unit/holders - diluted	69,722	59,666	170,222	74,810
Continuing Operations [Member] \| Partnership Interest [Member]
Earnings Per Share [Abstract]
Net income attributable to common stockholders	69,869	59,798	170,580	75,027
Net income for common stock unit/holders - diluted	$ 69,869	$ 59,798	$ 170,580	$ 75,027

Commitments and Contingencies, Letters of Credit (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 50,000,000
Letters of Credit Outstanding, Amount	9,400,000	$ 9,400,000
Purchase Commitment, Property Value	205,000,000
Purchase Commitment, Remaining Minimum Amount Committed	$ 62,000,000

Label	Element	Value
Partnership Interest [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 17,879,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	49,381,000
Parent Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17,879,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 49,381,000
Equity One Inc. [Member] \| Acquired Lease Intangible Liabilities [Member]
Weighted Average Accretion Period of Intangible Liabilities	reg_WeightedAverageAccretionPeriodOfIntangibleLiabilities	24 years 10 months 24 days

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Parent Company [Member]
Trading Securities, Change in Unrealized Holding Gain (Loss)	$ (484)	$ (842)	$ (400)	$ (1,705)
Partnership Interest [Member]
Trading Securities, Change in Unrealized Holding Gain (Loss)	$ (484)	$ (842)	$ (400)	$ (1,705)

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Parent Company [Member]
Capitalized interest	$ 5,820	$ 5,778
Partnership Interest [Member]
Capitalized interest	$ 5,820	$ 5,778

Description

Date of adoption

Effect on the financial statements or other significant matters

ASU 2017-05, February 2017, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets (Subtopic 610-20)

ASU 2017-05 clarifies that ASC 610-20 applies to all nonfinancial assets (including real estate) for which the counterparty is not a customer and requires an entity to derecognize a nonfinancial asset in a partial sale transaction when it ceases to have a controlling financial interest in the asset and has transferred control of the asset. Once an entity transfers control of the nonfinancial asset, the entity is required to measure any non-controlling interest it receives or retains at fair value.

Under the current guidance, a partial sale is recognized and carryover basis is used for the retained interest resulting in only partial gain recognition by the entity, however, the new guidance eliminates the use of carryover basis and generally requires the full gain be recognized.

January 2018

Sales of real estate assets are now accounted for under Subtopic 610-20, which provides for revenue recognition based on transfer of control.

For normal arms length property sales to unrelated parties, where Regency has no retained interest in the property, the Company will continue to recognize the full gain or loss upon transfer of control. For property sales in which Regency retains a noncontrolling interest in the property, fair value recognition for the retained noncontrolling interest is now required, which will result in full gain recognition upon loss of control.

The Company applied the modified retrospective adoption method, and on January 1, 2018, recognized through opening retained earnings $30.9 million of previously deferred gains from property sales to entities in which Regency had continuing involvement, resulting in a corresponding increase to the value of the Company's investment in those partnerships.