Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2018	May 04, 2018
Entity Registrant Name	REGENCY CENTERS CORP
Entity Central Index Key	0000910606
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		169,410,491
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	Mar. 31, 2018	Dec. 31, 2017
Real estate investments at cost:
Notes receivable	$ 16,316	$ 15,803
Liabilities:
Notes payable	3,276,888	2,971,715
Unsecured credit facilities	563,380	623,262
Noncontrolling interests:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(6,733,054)
Parent Company [Member]
Real estate investments at cost:
Property, Plant and Equipment, Gross	10,768,379	10,578,430
Properties in development	179,123	314,391
Gross real estate investments at cost	10,947,502	10,892,821
Less: accumulated depreciation	1,394,276	1,339,771
Total Cost Net of Accumulated Depreciation	9,553,226	9,553,050
Properties held for sale	8,742	0
Investments in real estate partnerships	448,257	386,304
Net real estate investments	10,010,225	9,939,354
Cash and cash equivalents	87,904	45,370
Restricted cash	5,732	4,011
Tenant and other receivables, net of allowance for doubtful accounts and straight-line rent reserves of $13,945 and $12,728 at March 31, 2018 and December 31, 2017, respectively	159,587	170,985
Deferred Costs, Leasing, Net	83,638	80,044
Acquired lease intangible assets, less accumulated amortization of $171,114 and $148,280 at March 31, 2018 and December 31, 2017, respectively	455,589	478,826
Other assets	431,181	427,127
Total assets	11,233,856	11,145,717
Liabilities:
Notes payable	3,276,888	2,971,715
Unsecured credit facilities	563,380	623,262
Accounts payable and other liabilities	212,515	234,272
Acquired lease intangible liabilities, less accumulated amortization of $68,123 and $56,550 at March 31, 2018 and December 31, 2017, respectively	527,264	537,401
Tenants’ security, escrow deposits and prepaid rent	48,428	46,013
Total liabilities	4,628,475	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; 169,408,781 and 171,364,908 shares issued at March 31, 2018 and December 31, 2017, respectively	1,694	1,714
Treasury stock at cost, 372,712 and 366,628 shares held at March 31, 2018 and December 31, 2017, respectively	(18,756)	(18,307)
Additional paid in capital	7,746,427	7,873,104
Accumulated other comprehensive income (loss)	4,764	(6,289)
Distributions in excess of net income	(1,169,828)	(1,158,170)
Total stockholders’ equity	6,564,301	6,692,052
Noncontrolling interests:
Exchangeable operating partnership units, aggregate redemption value of $20,637 and $24,206 at March 31, 2018 and December 31, 2017, respectively	10,847	10,907
Limited partners’ interests in consolidated partnerships	30,233	30,095
Stockholders' Equity Attributable to Noncontrolling Interest	41,080	41,002
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(6,605,381)	(6,733,054)
Total liabilities and equity	11,233,856	11,145,717
Partnership Interest [Member]
Real estate investments at cost:
Property, Plant and Equipment, Gross	10,768,379	10,578,430
Properties in development	179,123	314,391
Gross real estate investments at cost	10,947,502	10,892,821
Less: accumulated depreciation	1,394,276	1,339,771
Total Cost Net of Accumulated Depreciation	9,553,226	9,553,050
Properties held for sale	8,742	0
Investments in real estate partnerships	448,257	386,304
Net real estate investments	10,010,225	9,939,354
Cash and cash equivalents	87,904	45,370
Restricted cash	5,732	4,011
Tenant and other receivables, net of allowance for doubtful accounts and straight-line rent reserves of $13,945 and $12,728 at March 31, 2018 and December 31, 2017, respectively	159,587	170,985
Deferred Costs, Leasing, Net	83,638	80,044
Acquired lease intangible assets, less accumulated amortization of $171,114 and $148,280 at March 31, 2018 and December 31, 2017, respectively	455,589	478,826
Other assets	431,181	427,127
Total assets	11,233,856	11,145,717
Liabilities:
Notes payable	3,276,888	2,971,715
Unsecured credit facilities	563,380	623,262
Accounts payable and other liabilities	212,515	234,272
Acquired lease intangible liabilities, less accumulated amortization of $68,123 and $56,550 at March 31, 2018 and December 31, 2017, respectively	527,264	537,401
Tenants’ security, escrow deposits and prepaid rent	48,428	46,013
Total liabilities	4,628,475	4,412,663
Commitments and contingencies	0	0
Stockholders’ equity/Partners' capital:
General partner; 169,408,781 and 171,364,908 units outstanding at March 31, 2018 and December 31, 2017, respectively	6,559,537	6,698,341
Limited partners; 349,902 units outstanding at March 31, 2018 and December 31, 2017	10,847	10,907
Accumulated other comprehensive income (loss)	4,764	(6,289)
Total partners’ capital	6,575,148	6,702,959
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	30,233	30,095
Total noncontrolling interests	30,233	30,095
Total equity	6,605,381	6,733,054
Total liabilities and equity	$ 11,233,856	$ 11,145,717

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Parent Company [Member]
Allowance for doubtful accounts receivable	$ 13,945	$ 12,728
Deferred costs accumulated amortization	96,192	93,291
Accumulated amortization of acquired lease intangible assets	171,114	148,280
Accumulated accretion of acquired lease intangible liabilities	$ 68,123	$ 56,550
Preferred stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred units of Series 6-7, units issued	0	0
Preferred units of Series 6-7, units outstanding	0	0
Preferred stock, liquidation preferences per share	$ 0	$ 0
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	220,000,000	220,000,000
Common stock, shares issued	169,408,781	171,364,908
Exchangeable operating partnership units aggregate redemption value	$ 20,634	$ 24,206
Treasury stock, shares held at cost	372,712	366,628
Partnership Interest [Member]
Allowance for doubtful accounts receivable	$ 13,945	$ 12,728
Deferred costs accumulated amortization	96,192	93,291
Accumulated amortization of acquired lease intangible assets	171,114	148,280
Accumulated accretion of acquired lease intangible liabilities	$ 68,123	$ 56,550
Preferred units of general partner par value per unit	$ 0.01	$ 0.01
Preferred units of Series 6-7, units issued	0	0
Preferred units of Series 6-7, units outstanding	0	0
Preferred stock, liquidation preferences per share	$ 0	$ 0
General partner units, outstanding	169,408,781	171,364,908
Limited partner units, outstanding	349,902	349,902

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Document Fiscal Year Focus	2018
Other expense (income):
Provision for impairment	$ (374)	$ 0
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Net income (loss)	53,465	(20,715)
Parent Company [Member]
Revenues:
Minimum rent	201,392	141,240
Percentage rent	3,873	2,906
Recoveries from tenants and other income	64,270	45,279
Management Fees Revenue	7,158	6,706
Total revenues	276,693	196,131
Operating expenses:
Depreciation and amortization	88,525	60,053
Operating and maintenance	42,516	29,763
General and administrative	17,606	17,673
Real estate taxes	30,425	21,450
Other operating expenses (note 2)	1,632	71,512
Total operating expenses	180,704	200,451
Other expense (income):
Interest expense, net	36,785	27,199
Provision for impairment	16,054	0
Gain (Loss) on Extinguishment of Debt	(162)	0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	32	1,097
Nonoperating Income (Expense)	52,969	26,102
Income (loss) from operations before equity in income of investments in real estate partnerships	43,020	(30,422)
Equity in income of investments in real estate partnerships	10,349	9,342
Income tax (benefit) of taxable REIT subsidiary	0	50
Income (loss) from operations	53,369	(21,130)
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Net income (loss)	53,465	(20,715)
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	111	(19)
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(694)	(671)
Income attributable to noncontrolling interests	(805)	(652)
Net income (loss) attributable to the Company	52,660	(21,367)
Preferred stock dividends and issuance costs	0	(11,856)
Net Income (Loss) Available to Common Stockholders, Basic	$ 52,660	$ (33,223)
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Partnership Interest [Member]
Revenues:
Minimum rent	$ 201,392	$ 141,240
Percentage rent	3,873	2,906
Recoveries from tenants and other income	64,270	45,279
Management Fees Revenue	7,158	6,706
Total revenues	276,693	196,131
Operating expenses:
Depreciation and amortization	88,525	60,053
Operating and maintenance	42,516	29,763
General and administrative	17,606	17,673
Real estate taxes	30,425	21,450
Other operating expenses (note 2)	1,632	71,512
Total operating expenses	180,704	200,451
Other expense (income):
Provision for impairment	16,054	0
Gain (Loss) on Extinguishment of Debt	(162)	0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	32	1,097
Nonoperating Income (Expense)	52,969	26,102
Income (loss) from operations before equity in income of investments in real estate partnerships	43,020	(30,422)
Equity in income of investments in real estate partnerships	10,349	9,342
Income tax (benefit) of taxable REIT subsidiary	0	50
Income (loss) from operations	53,369	(21,130)
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Net income (loss)	53,465	(20,715)
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(694)	(671)
Income attributable to noncontrolling interests	(694)	(671)
Net income (loss) attributable to the Company	52,771	(21,386)
Distributions Paid To Preferred Unit Holders	0	11,856
Net income (loss) attributable to common unit holders	$ 52,771	$ (33,242)
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Parent Company [Member]
Trading Securities, Change in Unrealized Holding Gain (Loss)	$ 384	$ (852)
Partnership Interest [Member]
Trading Securities, Change in Unrealized Holding Gain (Loss)	$ 384	$ (852)

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Document Fiscal Year Focus	2018
Net income	$ (53,465)	$ 20,715
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	9,505	(68)
Other comprehensive income	11,524	2,620
Parent Company [Member]
Net income	(53,465)	20,715
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	9,505	(68)
Reclassification adjustment of derivative instruments included in net income	2,138	2,654
Available-for-sale Securities, Gross Unrealized Gain	(119)	32
Other comprehensive income	11,524	2,618
Comprehensive income (loss)	64,989	(18,097)
Less: comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(805)	(652)
Other comprehensive income attributable to noncontrolling interests	483	65
Comprehensive income attributable to noncontrolling interests	1,288	717
Comprehensive income (loss) attributable to the Company	63,701	(18,814)
Partnership Interest [Member]
Net income	(53,465)	20,715
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	9,505	(68)
Reclassification adjustment of derivative instruments included in net income	2,138	2,654
Available-for-sale Securities, Gross Unrealized Gain	(119)	32
Other comprehensive income	11,524	2,618
Comprehensive income (loss)	64,989	(18,097)
Less: comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(694)	(671)
Other comprehensive income attributable to noncontrolling interests	459	63
Comprehensive income attributable to noncontrolling interests	1,153	734
Comprehensive income (loss) attributable to the Company	$ 63,836	$ (18,831)

Consolidated Statement of Changes in Equity - USD ($) $ in Thousands	Total	Parent Company [Member]	Partnership Interest [Member]	Other Comprehensive Income (Loss) [Member] Parent Company [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]	Noncontrolling Interest [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Limited Partner [Member]	General Partner [Member]
Beginning balance at Dec. 31, 2016	$ 2,624,502	$ 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																							$ 2,589,334	$ 35,168	$ (18,346)	$ (1,967)	$ 2,609,647
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		(21,367)	$ (21,386)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(20,715)	(20,715)	(20,715)		0	0	0	0		0		(21,367)	(19)	671	652																							(21,386)	671	0	(19)	(21,367)
Current period other comprehensive income, net	2,620	2,618	2,618	$ 2,620	0	0	0	0	$ 2,554	2,555	0	2,555	2	63																								2,557		2,555	2	0
Other comprehensive income attributable to noncontrolling interests		65	63												65																								63
Adjustments to Additional Paid in Capital, Share-based Compensation, Other Long-term Incentive Plans, Requisite Service Period Recognition		1			0	0	(411)	412		0	0	1	0	0	0
Restricted stock issued, net of amortization	3,733	3,733			0	2	0	3,731		0	0	3,733	0	0	0																							3,733	0	0	0	3,733
Common stock redeemed for taxes withheld for stock based compensation, net																											$ 18,220	$ 0	$ 1	$ 0	$ 18,219	$ 0	$ 0	$ 18,220	$ 0	$ 0	$ 0
Common stock issued under dividend reinvestment plan		301	301																								301	0	0	0	301	0	0	301	0	0	0
Common stock issued, net of issuance costs																											4,479,686	0	655	0	4,479,031	0	0	4,479,686	0	0	0
Contributions from partners	153	153			0	0	0	0		0	0	0	0	153	153																							0	153	0	0	0
Distributions to partners	(54,317)	(838)			0	0	0	0		0	0	0	0	(838)	(838)																							(53,479)	(838)	0	(79)	53,400
Cash dividends declared: preferred stock/unit	3,241	3,241			0	0	0	0		0	3,241	3,241	0	0	0																							3,241	0	0	0	3,241
Redemption of preferred stock	250,000															$ 250,000	$ 250,000	$ 0	$ 0	$ (8,615)	$ 0	$ 8,615	$ 250,000	$ 0	$ 0	$ 0												250,000	0	0	0	250,000
Preferred stock		(11,856)
Cash dividends declared - common stock/unit		53,479			0	0	0	0		0	53,400	53,400	79	0	79
Ending Balance at Mar. 31, 2017	6,764,502	6,764,503			75,000	1,701	(17,473)	7,768,794		(15,791)	(1,080,882)	6,731,349	(2,063)	35,217	33,154																							6,729,285	35,217	(15,791)	(2,063)	6,747,139
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	(14)	12	30,889	30,901	0	2	2																							30,901	2	12	0	30,889
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	6,763,957	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																							6,733,860	30,097	(6,277)	10,907	6,729,230
Beginning balance at Dec. 31, 2017	6,733,054	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																							6,702,959	30,095	(6,289)	10,907	6,698,341
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		52,660	52,771
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	53,465	53,465	53,465		0	0	0	0		0		52,660	111	694	805																							52,771	694	0	111	52,660
Current period other comprehensive income, net	11,524	11,524	11,524		0	0	0	0	$ 11,041	11,041	0	11,041	23	460																								11,064		11,041	23	0
Other comprehensive income attributable to noncontrolling interests		483	459																																				460
Adjustments to Additional Paid in Capital, Share-based Compensation, Other Long-term Incentive Plans, Requisite Service Period Recognition		(3)			0	0	(449)	446		0	0	(3)	0	0	0
Restricted stock issued, net of amortization	4,121	4,121			0	1	0	4,120		0	0	4,121	0	0	0																							4,121	0	0	0	4,121
Common stock redeemed for taxes withheld for stock based compensation, net																											6,643	0	0	0	6,643	0	0	6,643	0	0	0
Stock Repurchased and Retired During Period, Value																											(124,989)	0	(21)	0	(124,968)	0		(124,989)	0	0	0
Common stock issued under dividend reinvestment plan		358	$ 358																								358	0	0	0	358	0	0	358	0	0	0
Common stock issued, net of issuance costs																											$ 10	$ 0	$ 0	$ 0	$ 10	$ 0	$ 0	$ 10	$ 0	$ 0	$ 0
Distributions to partners	(96,419)	(1,018)			0	0	0	0		0	0	0	0	(1,018)	(1,018)																							(95,401)	(1,018)	0	(194)	(95,207)
Common units redeemed as a result of common stock redeemed by Parent Company, net of issuances	$ 6,275																																					6,275	0	0	0	6,275
Preferred stock		0
Cash dividends declared - common stock/unit		95,401			0	0	0	0		0	95,207	95,207	194	0	194
Ending Balance at Mar. 31, 2018		$ 6,605,381			$ 0	$ 1,694	$ (18,756)	$ 7,746,427		$ 4,764	$ (1,169,828)	$ 6,564,301	$ 10,847	$ 30,233	$ 41,080																							$ 6,575,148	$ 30,233	$ 4,764	$ 10,847	$ 6,559,537

Consolidated Statement of Changes in Partner Capital Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Dividends, Preferred Stock, Cash		$ 3,241
Shareholders' Equity		6,764,502
Net income	$ 53,465	(20,715)
Other comprehensive income (loss)	11,524	2,620
Deferred Compensation Plan	(3)
Partners' Capital Account, Contributions		153
Partners' Capital Account, Distributions	96,419	54,317
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(124,989)
Common unit issued as a result of common stock issued by Parent Company, net of purchases	(6,275)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	4,121	3,733
Stockholders Equity including noncontrolling interest	6,605,381
Common unit redeemed as result of common stock redeemed by parent		4,461,767
Noncontrolling Interest [Member]
Dividends, Preferred Stock, Cash		0
Shareholders' Equity	30,233	35,217
Net income	694	671
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	460	63
Deferred Compensation Plan	0
Partners' Capital Account, Contributions		153
Partners' Capital Account, Distributions	1,018	838
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	0
Common unit issued as a result of common stock issued by Parent Company, net of purchases	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0
Common unit redeemed as result of common stock redeemed by parent		0
Partners Capital Total [Member]
Dividends, Preferred Stock, Cash		3,241
Shareholders' Equity	6,575,148	6,729,285
Net income	52,771	(21,386)
Other comprehensive income (loss)	11,064	2,557
Deferred Compensation Plan	(3)
Partners' Capital Account, Contributions		0
Partners' Capital Account, Distributions	95,401	53,479
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(124,989)
Common unit issued as a result of common stock issued by Parent Company, net of purchases	(6,275)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	4,121	3,733
Common unit redeemed as result of common stock redeemed by parent		4,461,767
AOCI Attributable to Parent [Member]
Dividends, Preferred Stock, Cash		0
Shareholders' Equity	4,764	(15,791)
Net income	0	0
Other comprehensive income (loss)	11,041	2,555
Deferred Compensation Plan	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
Common unit issued as a result of common stock issued by Parent Company, net of purchases	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0
Common unit redeemed as result of common stock redeemed by parent		0
Limited Partner [Member]
Dividends, Preferred Stock, Cash		0
Shareholders' Equity	10,847	(2,063)
Net income	111	(19)
Other comprehensive income (loss)	23	2
Deferred Compensation Plan	0
Partners' Capital Account, Contributions		0
Partners' Capital Account, Distributions	194	79
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	0
Common unit issued as a result of common stock issued by Parent Company, net of purchases	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0
Common unit redeemed as result of common stock redeemed by parent		0
General Partner [Member]
Dividends, Preferred Stock, Cash		3,241
Shareholders' Equity	6,559,537	6,747,139
Net income	52,660	(21,367)
Other comprehensive income (loss)	0	0
Deferred Compensation Plan	(3)
Partners' Capital Account, Contributions		0
Partners' Capital Account, Distributions	95,207	(53,400)
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(124,989)
Common unit issued as a result of common stock issued by Parent Company, net of purchases	(6,275)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	4,121	3,733
Common unit redeemed as result of common stock redeemed by parent		4,461,767
Partnership Interest [Member]
Net income	53,465	(20,715)
Other comprehensive income (loss)	11,524	2,618
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	459	63
AOCI Attributable to Parent [Member]
Other comprehensive income (loss)	$ 11,041	$ 2,554

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ (53,465)	$ 20,715
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for impairment	374	0
Cash flows from investing activities:
Proceeds from sale of real estate investments	3,227	1,749
Cash flows from financing activities:
Repayment of unsecured credit facilities	(60,000)
Partnership Interest [Member]
Cash flows from operating activities:
Net income	(53,465)	20,715
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,525	60,053
Amortization of deferred loan cost and debt premium	2,471	2,459
Amortization of above and below Market Leases	(8,181)	(3,484)
Share-based Compensation	3,397	12,131
Equity in income of investments in real estate partnerships	(10,349)	(9,342)
Gain on sale of real estate, net of tax	(96)	(415)
Provision for impairment	(16,054)	0
Gain (Loss) on Extinguishment of Debt	(162)	0
Distribution of earnings from operations of investments in real estate partnerships	(13,319)	(12,784)
Deferred Income Tax Expense (Benefit)	0	(87)
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	0	0
Deferred compensation expense	40	1,062
Realized and unrealized gain on investments	(30)	(1,064)
Changes in assets and liabilities:
Accounts receivable, net	8,955	8,974
Straight-line rent receivables, net	(4,659)	(3,439)
Deferred leasing costs	(1,189)	(1,355)
Other assets	(476)	(2,657)
Accounts payable and other liabilities	(13,793)	(24,370)
Tenants’ security, escrow deposits and prepaid rent	2,253	2,121
Net cash provided by operating activities	149,868	32,656
Cash flows from investing activities:
Acquisition of operating real estate	(20,071)	0
Payments for Merger Related Costs	0	(648,707)
Real estate development and capital improvements	(51,968)	(63,257)
Proceeds from sale of real estate investments	3,227	1,683
Payments for (Proceeds from) Loans Receivable	462	510
Investments in real estate partnerships	(39,330)	(1,688)
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital	2,328	25,428
Dividends on investment securities	71	55
Acquisition of securities	(7,543)	(3,334)
Proceeds from sale of securities	6,542	3,815
Net cash used in investing activities	(107,206)	(686,515)
Cash flows from financing activities:
Payments Related to Tax Withholding for Share-based Compensation	(6,755)	(18,275)
Payments for Repurchase of Common Stock	(124,989)	0
Proceeds from sale of treasury stock	99	76
Payments for Repurchase of Preferred Units	0	250,000
Distributions to limited partners in consolidated partnerships, net	(1,018)	(786)
Dividends paid to common stockholders	(95,043)	(53,368)
Dividends paid to preferred stockholders	0	(3,241)
Proceeds from Issuance of Unsecured Debt	299,511	646,424
Proceeds from unsecured credit facilities	185,000	740,000
Repayment of unsecured credit facilities	(245,000)	(360,000)
Proceeds from notes payable	1,740	1,577
Repayments of Notes Payable	0	(11,422)
Scheduled principal payments	(2,773)	(1,367)
Payment of loan costs	(9,179)	(8,796)
Net cash provided by financing activities	1,593	680,822
Net increase in cash and cash equivalents and restricted cash	44,255	26,963
Cash and cash equivalents and restricted cash, end of period	93,636	44,842
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $2,179 and $1,061 in 2018 and 2017, respectively)	30,467	7,687
Proceeds from Income Tax Refunds	407	0
Supplemental disclosure of non-cash transactions:
Common stock issued under dividend reinvestment plan	358	301
Stock-based compensation, net of capitalization	837	778
Contributions from limited partners in consolidated partnerships, net	0	100
Common stock issued for dividend reinvestment in trust	205	177
Contribution of stock awards into trust	637	929
Distribution of stock held in trust	317	4,114
Unrealized Gain (Loss) on Securities	(128)	32
Noncash or Part Noncash Acquisition, Debt Assumed	9,700	0
Parent Company [Member]
Cash flows from operating activities:
Net income	(53,465)	20,715
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,525	60,053
Amortization of deferred loan cost and debt premium	2,471	2,459
Amortization of above and below Market Leases	(8,181)	(3,484)
Share-based Compensation	3,397	12,131
Equity in income of investments in real estate partnerships	(10,349)	(9,342)
Gain on sale of real estate, net of tax	(96)	(415)
Provision for impairment	(16,054)	0
Gain (Loss) on Extinguishment of Debt	(162)	0
Distribution of earnings from operations of investments in real estate partnerships	(13,319)	(12,784)
Deferred Income Tax Expense (Benefit)	0	(87)
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	0	0
Deferred compensation expense	40	1,062
Realized and unrealized gain on investments	(30)	(1,064)
Changes in assets and liabilities:
Accounts receivable, net	8,955	8,974
Straight-line rent receivables, net	(4,659)	(3,439)
Deferred leasing costs	(1,189)	(1,355)
Other assets	(476)	(2,657)
Accounts payable and other liabilities	(13,793)	(24,370)
Tenants’ security, escrow deposits and prepaid rent	2,253	2,121
Net cash provided by operating activities	149,868	32,656
Cash flows from investing activities:
Acquisition of operating real estate	(20,071)	0
Payments for Merger Related Costs	0	(648,707)
Real estate development and capital improvements	(51,968)	(63,257)
Proceeds from sale of real estate investments	3,227	1,683
Payments for (Proceeds from) Loans Receivable	462	510
Investments in real estate partnerships	(39,330)	(1,688)
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital	2,328	25,428
Dividends on investment securities	71	55
Acquisition of securities	(7,543)	(3,334)
Proceeds from sale of securities	6,542	3,815
Net cash used in investing activities	(107,206)	(686,515)
Cash flows from financing activities:
Payments Related to Tax Withholding for Share-based Compensation	(6,755)	(18,275)
Payments for Repurchase of Common Stock	(124,989)	0
Proceeds from sale of treasury stock	99	76
Payments for Repurchase of Preferred Units	0	250,000
Distributions to limited partners in consolidated partnerships, net	(1,018)	(786)
Distributions to exchangeable operating partnership unit holders	(194)	(79)
Dividends paid to common stockholders	(94,849)	(53,289)
Dividends paid to preferred stockholders	0	(3,241)
Proceeds from Issuance of Unsecured Debt	299,511	646,424
Proceeds from unsecured credit facilities	185,000	740,000
Repayment of unsecured credit facilities	(245,000)	(360,000)
Proceeds from notes payable	1,740	1,577
Repayments of Notes Payable	0	(11,422)
Scheduled principal payments	(2,773)	(1,367)
Payment of loan costs	(9,179)	(8,796)
Net cash provided by financing activities	1,593	680,822
Net increase in cash and cash equivalents and restricted cash	44,255	26,963
Cash and cash equivalents and restricted cash, end of period	93,636	44,842
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $2,179 and $1,061 in 2018 and 2017, respectively)	30,467	7,687
Proceeds from Income Tax Refunds	407	0
Supplemental disclosure of non-cash transactions:
Common stock issued under dividend reinvestment plan	358	301
Stock-based compensation, net of capitalization	837	778
Contributions from limited partners in consolidated partnerships, net	0	100
Common stock issued for dividend reinvestment in trust	205	177
Contribution of stock awards into trust	637	929
Distribution of stock held in trust	317	4,114
Unrealized Gain (Loss) on Securities	(128)	32
Noncash or Part Noncash Acquisition, Debt Assumed	9,700	0
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

3 Months Ended

Mar. 31, 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 engages in the ownership, management, leasing, acquisition, and development of retail 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 March 31, 2018, the Parent Company, the Operating Partnership, and their controlled subsidiaries on a consolidated basis owned 311 retail shopping centers and held partial interests in an additional 118 retail shopping centers 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 March 31, 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 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 March 31, 2018, Regency had a partial ownership interest in 129 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 in lives 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 VIEs, exclusive of the Operating Partnership as a whole, are as follows:



(in thousands)	March 31, 2018		December 31, 2017
Assets
Net real estate investments	$	185,118	172,736
Cash and cash equivalents	4,733		4,993
Liabilities
Notes payable	18,296		16,551
Equity
Limited partners’ interests in consolidated partnerships	17,658		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 on January 1, 2018, 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 is 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 under the new revenue standard. 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.

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 to the customer at the time the related transaction closes, which is the point in time when the Company recognizes the related fees. 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 for the three months ended March 31:



(in thousands)	Timing of satisfaction of performance obligations	2018		2017
Property management services	Over time	$	3,768	3,418
Asset management services	Over time	1,703		1,789
Leasing services	Point in time	685		829
Other transaction fees	Point in time	1,002		670
Total management, transaction, and other fees		$	7,158	6,706

The accounts receivable for management services, which are included within Tenant and other receivables in the accompanying Consolidated Balance Sheets, are $9.3 million and $8.7 million, as of March 31, 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, and reflects expected synergies from combining Regency's and Equity One's operations. The Company accounts for goodwill in accordance with the Intangibles - Goodwill and Other Topic of the FASB ASC 350, 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 an 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

3 Months Ended

Mar. 31, 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)	March 31, 2018		December 31, 2017
Land	$	4,240,213	4,235,032
Land improvements	596,729		556,140
Buildings	5,088,332		4,999,378
Building and tenant improvements	843,105		787,880
Total Land, building and improvements	$	10,768,379	10,578,430

Acquisitions

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



(in thousands)		Three months ended March 31, 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 in Blocks I	Seattle, WA	Operating	49.9%	$54,500	—	3,668	2,350
1/2/18	Ballard in Blocks II	Seattle, WA	Development	49.9%	4,000	—	—	—
1/5/18	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
Total property acquisitions					$123,230	9,700	9,929	6,123


(in thousands)		Three months ended March 31, 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%	—	—	—	—
Total property acquisitions					$9,500	—	—	—
⁽¹⁾ The Company leased 10.67 acres for a ground up development.

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 make 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 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, which ended during the three months ended March 31, 2018, resulting in an immaterial adjustment to the purchase price allocation.

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 (unaudited)

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 March 31,
(in thousands, except per share data)		2017
Total revenues		265,174
Income from operations	⁽¹⁾	67,397
Net income attributable to common stockholders	⁽¹⁾	54,809
Income per common share - basic		0.32
Income per common share - diluted		0.32
⁽¹⁾The pro forma earnings for the three months ended March 31, 2017, were adjusted to exclude $92.7 million of merger costs.

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.

- Definition

The entire disclosure for certain real estate investment financial statements, real estate investment trust operating support agreements, real estate owned, retail land sales, time share transactions, as well as other real estate related disclosures.

+ References + Details

Property Dispositions

3 Months Ended

Mar. 31, 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:



	Three months ended March 31,
(in thousands)	2018			2017
Net proceeds from sale of real estate investments	$	3,227		$	1,749
Gain on sale of real estate, net of tax	$	96		$	415
Provision for impairment of real estate sold	$	374		$	—
Number of operating properties sold	1			—
Number of land parcels sold	—			2
Percent interest sold	100		%	100		%

- Definition

The entire disclosure 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ Details

Other Assets Other Assets (Notes)

3 Months Ended

Mar. 31, 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)	March 31, 2018		December 31, 2017
Goodwill	$	330,716	331,884
Investments	42,483		41,636
Prepaid and other	20,218		30,332
Derivative assets	22,447		14,515
Furniture, fixtures, and equipment, net	6,891		6,123
Deferred financing costs, net	8,426		2,637
Total other assets	$	431,181	427,127

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



(in thousands)	March 31, 2018			December 31, 2017
Beginning of year balance	$	331,884		—
Goodwill resulting from Equity One merger	500			331,884
Goodwill allocated to properties sold	(253		)	—
Impairment losses associated with properties held and used ⁽¹⁾	(1,415		)	—
End of period balance	$	330,716		331,884
⁽¹⁾ See note 7, Fair value measurements, for additional information about the impairment loss associated with properties held and used.

Notes Payable and Unsecured Credit Facilities

3 Months Ended

Mar. 31, 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	March 31, 2018			December 31, 2017
Notes payable:
Fixed rate mortgage loans	5.1%	4.4%	$	526,048		520,193
Variable rate mortgage loans	3.3%	3.5%	127,631		⁽¹⁾	125,866
Fixed rate unsecured public and private debt	4.1%	4.5%	2,623,209			2,325,656
Total notes payable			3,276,888			2,971,715
Unsecured credit facilities:
Line of Credit (the "Line") ⁽²⁾	2.6%	2.8%	—			60,000
Term loans	2.4%	2.5%	563,380			563,262
Total unsecured credit facilities			563,380			623,262
Total debt outstanding			$	3,840,268		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 4.07%.
⁽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 million of the proceeds were used to repay our Line. Subsequent to quarter-end, $163.2 million was used to early redeem, in April 2018, the senior unsecured public notes originally due June 2020. The remainder of the proceeds are intended to be 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 entire $1.25 billion Line.

Subsequent Event

On April 2, 2018, the Company paid $163.2 million, including accrued and unpaid interest through the redemption date and a make-whole amount, to redeem its outstanding $150.0 million 6% Senior Unsecured Notes originally due June 15, 2020. As noted above, the Company used proceeds from its March 9, 2018 offering to fund the redemption.

As of March 31, 2018, scheduled principal payments and maturities on notes payable and unsecured credit facilities were as follows:



(in thousands)	March 31, 2018
Scheduled Principal Payments and Maturities by Year:	Scheduled Principal Payments		Mortgage Loan Maturities	Unsecured Maturities ⁽¹⁾			Total
2018	$	8,001	112,226	—			120,227
2019	9,519		23,525	—			33,044
2020	11,287		78,580	450,000		⁽²⁾	539,867
2021	11,600		66,751	250,000			328,351
2022	11,799		5,848	565,000			582,647
Beyond 5 Years	45,938		260,336	1,950,000			2,256,274
Unamortized debt premium/(discount) and issuance costs	—		8,269	(28,411	)		(20,142	)
Total	$	98,144	555,535	3,186,589			3,840,268

⁽¹⁾ Includes unsecured public debt and unsecured credit facilities.
⁽²⁾ On April 2, 2018, the Company redeemed its outstanding $150.0 million 6.0% senior unsecured public notes, due June 15, 2020, for a redemption price of $163.2 million, including accrued and unpaid interest through the redemption date and a make-whole amount.

The Company has $135.8 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 March 31, 2018 with the financial and other covenants under its unsecured public and private placement debt and unsecured credit facilities.

Derivatives

3 Months Ended

Mar. 31, 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		Bank Pays Variable Rate of	Regency Pays Fixed Rate of	March 31, 2018		December 31, 2017
4/3/17	12/2/20	$	300,000	1 Month LIBOR with Floor	1.824%	$	4,690	1,804
8/1/16	1/5/22	265,000		1 Month LIBOR with Floor	1.053%	13,969		10,744
4/7/16	4/1/23	20,000		1 Month LIBOR	1.303%	1,130		801
12/1/16	11/1/23	33,000		1 Month LIBOR	1.490%	1,779		1,166
6/2/17	6/2/27	37,500		1 Month LIBOR with Floor	2.366%	879		(177	)
						$	22,447	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 March 31, 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 effective portion of 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 Accumulated OCI 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 March 31,					Three months ended March 31,					Three months ended March 31,
(in thousands)	2018		2017			2018		2017			2018		2017
Interest rate swaps	$	9,505	(68	)	Interest expense	$	2,138	(2,654	)	Interest expense, net	$	36,785	27,199

As of March 31, 2018, the Company expects $4.4 million of net deferred losses on derivative instruments in accumulated other comprehensive income, 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 $8.4 million which is related to previously settled swaps on the Company's ten year fixed rate unsecured loans.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Fair Value Measurements

3 Months Ended

Mar. 31, 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:



	March 31, 2018			December 31, 2017
(in thousands)	Carrying Amount		Fair Value	Carrying Amount		Fair Value
Financial assets:
Notes receivable	$	16,316	16,345	$	15,803	15,660
Financial liabilities:
Notes payable	$	3,276,888	3,291,803	$	2,971,715	3,058,044
Unsecured credit facilities	$	563,380	565,000	$	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 March 31, 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 March 31, 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	$	33,631	33,631	—	—
Available-for-sale debt securities	8,852		—	8,852	—
Interest rate derivatives	22,447		—	22,447	—
Total	$	64,930	33,631	31,299	—



	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	)	—

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

Fair Value Measurements as of March 31, 2018

(in thousands)

Quoted Prices in Active Markets for Identical Assets

Significant Other Observable Inputs

Significant Unobservable Inputs

Total Gains

Assets:

Balance

(Level 1)

(Level 2)

(Level 3)

(Losses)

Long-lived assets held and used

Operating property

27,936

—

27,936

—

(15,680

)

During the three months ended March 31, 2018, the Company recognized a $15.7 million impairment on an operating property, including $1.4 million for goodwill. The impairment of the real estate, which is classified as held and used as of March 31, 2018, was determined based on the expected selling price as compared to the Company's carrying value of its investment.

There were no assets measured at fair value on a nonrecurring basis as of 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

3 Months Ended

Mar. 31, 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. As of March 31, 2018, $500 million of common stock remained available for issuance under this ATM equity program.

There were no shares issued under the ATM equity program during the three months ended March 31, 2018 or 2017.

Share Repurchase Program

On February 7, 2018, the Company's Board authorized a common share repurchase program under which the Company may purchase, from time to time, $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 purchased under the program depend upon marketplace conditions and other factors. The program remains subject to the discretion of the board. Through March 31, 2018, the Company had repurchased 2,145,209 shares for $125.0 million at an average price of $58.24 per share.

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 Interest							Noncontrolling Interest					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	(88		)	32		(56	)	21		—	21		(35	)
Amounts reclassified from accumulated other comprehensive income ⁽¹⁾	2,610			—		2,610		44		—	44		2,654
Current period other comprehensive income, net	2,522			32		2,554		65		—	65		2,619
Balance as of March 31, 2017	$	(15,805	)	13		(15,792	)	(236	)	—	(236	)	(16,028	)

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

	Controlling Interest							Noncontrolling Interest					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⁾	(14		)	—		(14	)	—		—	—		(14	)
Adjusted balance as of December 31, 2017	(6,276		)	(27	)	(6,303	)	(112	)	—	(112	)	(6,415	)
Other comprehensive income before reclassifications	9,003			(119	)	8,884		502		—	502		9,386
Amounts reclassified from accumulated other comprehensive income ⁽¹⁾	2,157			—		2,157		(19	)	—	(19	)	2,138
Current period other comprehensive income, net	11,160			(119	)	11,041		483		—	483		11,524
Balance as of March 31, 2018	$	4,884		(146	)	4,738		371		—	371		5,109

⁽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 accumulated other comprehensive income for previously recognized hedge ineffectiveness from off-market hedges, as further discussed in note 1.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Stock-Based Compensation	3 Months Ended
Stock-Based Compensation	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation During three months ended March 31, 2018, the Company granted 241,356 shares of restricted stock with a weighted-average grant-date fair value of $64.06 per share. The Company records stock-based compensation expense within general and administrative expenses in the accompanying Consolidated Statements of Operations.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

Non-Qualified Deferred Compensation Plan

3 Months Ended

Mar. 31, 2018

Compensation and Retirement Disclosure [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)	March 31, 2018		December 31, 2017
Assets:
Equity securities ⁽¹⁾	$	32,609	31,662
Liabilities:
Accounts payable and other liabilities	$	32,354	31,383
⁽¹⁾ Included within Other assets in the accompanying Consolidated Balance Sheets.

Earnings per Share and Unit

3 Months Ended

Mar. 31, 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 March 31,
(in thousands, except per share data)	2018		2017
Numerator:
Income (loss) from operations attributable to common stockholders - basic	$	52,660	(33,223	)
Income (loss) from operations attributable to common stockholders - diluted	$	52,660	(33,223	)
Denominator:
Weighted average common shares outstanding for basic EPS	170,704		126,649
Weighted average common shares outstanding for diluted EPS ⁽¹⁾	170,959		126,649

Income (loss) per common share – basic	$	0.31	(0.26	)
Income (loss) per common share – diluted	$	0.31	(0.26	)
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and shares issuable under the forward equity offering 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 have no impact. Weighted average exchangeable Operating Partnership units outstanding for the three months ended March 31, 2018 and 2017 were 349,902 and 154,170, respectively.

Operating Partnership Earnings per Unit

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



	Three months ended March 31,
(in thousands, except per share data)	2018		2017
Numerator:
Income (loss) from operations attributable to common unit holders - basic	$	52,771	(33,242	)
Income (loss) from operations attributable to common unit holders - diluted	$	52,771	(33,242	)
Denominator:
Weighted average common units outstanding for basic EPU	171,054		126,803
Weighted average common units outstanding for diluted EPU ⁽¹⁾	171,309		126,803

Income (loss) per common unit – basic	$	0.31	(0.26	)
Income (loss) per common unit – diluted	$	0.31	(0.26	)
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and the forward equity offering using the treasury stock method.

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 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 March 31, 2018 and December 31, 2017, the Company had $9.4 million and $9.4 million in letters of credit outstanding, respectively.

Organization and Principles of Consolidation (Policies)

3 Months Ended

Mar. 31, 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 major classes of assets, liabilities, and non-controlling equity interests held by the Company's VIEs, exclusive of the Operating Partnership as a whole, are as follows:



(in thousands)	March 31, 2018		December 31, 2017
Assets
Net real estate investments	$	185,118	172,736
Cash and cash equivalents	4,733		4,993
Liabilities
Notes payable	18,296		16,551
Equity
Limited partners’ interests in consolidated partnerships	17,658		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



(in thousands)	Timing of satisfaction of performance obligations	2018		2017
Property management services	Over time	$	3,768	3,418
Asset management services	Over time	1,703		1,789
Leasing services	Point in time	685		829
Other transaction fees	Point in time	1,002		670
Total management, transaction, and other fees		$	7,158	6,706

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:
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 transition guidance provides companies with the option of early adopting the new standard using a modified retrospective transition method in any interim period after issuance of the update, or alternatively requires adoption for fiscal years beginning after December 15, 2018. This adoption method will require 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 on January 1, 2018, 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 material impact on its results of operations, financial condition or cash flows as the company has an immaterial 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. Early adoption is permitted on a retrospective basis.	January 2018	The adoption of this ASU did not result in a change to the Company's cash flow statement.



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
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 should be 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 three months ended March 31, 2017, net cash provided by operating activities decreased by $67,000 and net cash used in investing activities decreased by $3.4 million, with a corresponding increase in cash and cash equivalents, and restricted cash within the Consolidated Statements of Cash Flows.

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. The standard allows for either "full retrospective" adoption, meaning the standard is applied to all of the periods presented, or "modified retrospective" adoption, meaning the standard is applied only to the most recent period presented in the financial statements.	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 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.



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


ASU 2016-02, February 2016, Leases (Topic 842)	This ASU 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, including a change to the treatment of internal leasing costs and legal costs, which can no longer be capitalized. Early adoption of this standard is permitted to coincide with adoption of ASU 2014-09. The standard requires 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.	January 2019	The Company is evaluating the impact this standard will have on its financial statements and related disclosures. Upon adoption, the Company will recognize lease obligations for its ground and office leases with a corresponding right of use asset. The Company will continue to recognize a single lease expense for its existing operating leases, currently included in Operating and maintenance expenses and General and administrative expenses, respectively, in the Consolidated Statements of Operations. Ground leases entered or acquired subsequent to the adoption date will likely be considered finance leases, which will result in a slightly accelerated impact to earnings reflected in amortization expense and interest expense. Capitalization of internal leasing costs and legal costs will no longer be permitted upon the adoption of this standard, which will result in an increase in Total operating expenses in the Consolidated Statements of Operations in the period of adoption and prospectively. Historic capitalization of internal leasing costs was $1.3 million and $10.4 million during the three months ended March 31, 2018 and the year ended December 31, 2017, respectively. Historic capitalization of legal costs was $0.4 million and $1.2 million during the three months ended March 31, 2018 and the year ended December 31, 2017, respectively, including our pro rata share recognized through Equity in income of investments in real estate partnerships. The Company will continue its evaluation of the accounting standard, additional impacts of adoption, and changes in presentation and disclosure requirements.

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.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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+ Details

Organization and Principles of Consolidation Recent Accounting Pronouncements (Tables)

3 Months Ended

Mar. 31, 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:
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 transition guidance provides companies with the option of early adopting the new standard using a modified retrospective transition method in any interim period after issuance of the update, or alternatively requires adoption for fiscal years beginning after December 15, 2018. This adoption method will require 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 on January 1, 2018, 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 material impact on its results of operations, financial condition or cash flows as the company has an immaterial 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. Early adoption is permitted on a retrospective basis.	January 2018	The adoption of this ASU did not result in a change to the Company's cash flow statement.



Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
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 should be 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 three months ended March 31, 2017, net cash provided by operating activities decreased by $67,000 and net cash used in investing activities decreased by $3.4 million, with a corresponding increase in cash and cash equivalents, and restricted cash within the Consolidated Statements of Cash Flows.

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. The standard allows for either "full retrospective" adoption, meaning the standard is applied to all of the periods presented, or "modified retrospective" adoption, meaning the standard is applied only to the most recent period presented in the financial statements.	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 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.



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


ASU 2016-02, February 2016, Leases (Topic 842)	This ASU 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, including a change to the treatment of internal leasing costs and legal costs, which can no longer be capitalized. Early adoption of this standard is permitted to coincide with adoption of ASU 2014-09. The standard requires 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.	January 2019	The Company is evaluating the impact this standard will have on its financial statements and related disclosures. Upon adoption, the Company will recognize lease obligations for its ground and office leases with a corresponding right of use asset. The Company will continue to recognize a single lease expense for its existing operating leases, currently included in Operating and maintenance expenses and General and administrative expenses, respectively, in the Consolidated Statements of Operations. Ground leases entered or acquired subsequent to the adoption date will likely be considered finance leases, which will result in a slightly accelerated impact to earnings reflected in amortization expense and interest expense. Capitalization of internal leasing costs and legal costs will no longer be permitted upon the adoption of this standard, which will result in an increase in Total operating expenses in the Consolidated Statements of Operations in the period of adoption and prospectively. Historic capitalization of internal leasing costs was $1.3 million and $10.4 million during the three months ended March 31, 2018 and the year ended December 31, 2017, respectively. Historic capitalization of legal costs was $0.4 million and $1.2 million during the three months ended March 31, 2018 and the year ended December 31, 2017, respectively, including our pro rata share recognized through Equity in income of investments in real estate partnerships. The Company will continue its evaluation of the accounting standard, additional impacts of adoption, and changes in presentation and disclosure requirements.

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.

- Definition

Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=66092750

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6523989

+ Details

Real Estate Investments (Tables)

3 Months Ended

Mar. 31, 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)	March 31, 2018		December 31, 2017
Land	$	4,240,213	4,235,032
Land improvements	596,729		556,140
Buildings	5,088,332		4,999,378
Building and tenant improvements	843,105		787,880
Total Land, building and improvements	$	10,768,379	10,578,430

Schedule of business acquisitions

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



(in thousands)		Three months ended March 31, 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 in Blocks I	Seattle, WA	Operating	49.9%	$54,500	—	3,668	2,350
1/2/18	Ballard in Blocks II	Seattle, WA	Development	49.9%	4,000	—	—	—
1/5/18	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
Total property acquisitions					$123,230	9,700	9,929	6,123


(in thousands)		Three months ended March 31, 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%	—	—	—	—
Total property acquisitions					$9,500	—	—	—
⁽¹⁾ The Company leased 10.67 acres for a ground up development.

Equity One Inc. [Member]

Business Acquisition [Line Items]

Schedule of business acquisitions

The following table provides the components that make 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



(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

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 (unaudited)



		Three months ended March 31,
(in thousands, except per share data)		2017
Total revenues		265,174
Income from operations	⁽¹⁾	67,397
Net income attributable to common stockholders	⁽¹⁾	54,809
Income per common share - basic		0.32
Income per common share - diluted		0.32
⁽¹⁾The pro forma earnings for the three months ended March 31, 2017, were adjusted to exclude $92.7 million of merger costs.

Property Dispositions (Tables)

3 Months Ended

Mar. 31, 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:



	Three months ended March 31,
(in thousands)	2018			2017
Net proceeds from sale of real estate investments	$	3,227		$	1,749
Gain on sale of real estate, net of tax	$	96		$	415
Provision for impairment of real estate sold	$	374		$	—
Number of operating properties sold	1			—
Number of land parcels sold	—			2
Percent interest sold	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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ Details

Other Assets Other Assets (Tables)

3 Months Ended

Mar. 31, 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)	March 31, 2018		December 31, 2017
Goodwill	$	330,716	331,884
Investments	42,483		41,636
Prepaid and other	20,218		30,332
Derivative assets	22,447		14,515
Furniture, fixtures, and equipment, net	6,891		6,123
Deferred financing costs, net	8,426		2,637
Total other assets	$	431,181	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)	March 31, 2018			December 31, 2017
Beginning of year balance	$	331,884		—
Goodwill resulting from Equity One merger	500			331,884
Goodwill allocated to properties sold	(253		)	—
Impairment losses associated with properties held and used ⁽¹⁾	(1,415		)	—
End of period balance	$	330,716		331,884
⁽¹⁾ See note 7, Fair value measurements, for additional information about the impairment loss associated with properties held and used.

Notes Payable and Unsecured Credit Facilities (Tables)

3 Months Ended

Mar. 31, 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	March 31, 2018			December 31, 2017
Notes payable:
Fixed rate mortgage loans	5.1%	4.4%	$	526,048		520,193
Variable rate mortgage loans	3.3%	3.5%	127,631		⁽¹⁾	125,866
Fixed rate unsecured public and private debt	4.1%	4.5%	2,623,209			2,325,656
Total notes payable			3,276,888			2,971,715
Unsecured credit facilities:
Line of Credit (the "Line") ⁽²⁾	2.6%	2.8%	—			60,000
Term loans	2.4%	2.5%	563,380			563,262
Total unsecured credit facilities			563,380			623,262
Total debt outstanding			$	3,840,268		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 4.07%.
⁽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 March 31, 2018, scheduled principal payments and maturities on notes payable and unsecured credit facilities were as follows:



(in thousands)	March 31, 2018
Scheduled Principal Payments and Maturities by Year:	Scheduled Principal Payments		Mortgage Loan Maturities	Unsecured Maturities ⁽¹⁾			Total
2018	$	8,001	112,226	—			120,227
2019	9,519		23,525	—			33,044
2020	11,287		78,580	450,000		⁽²⁾	539,867
2021	11,600		66,751	250,000			328,351
2022	11,799		5,848	565,000			582,647
Beyond 5 Years	45,938		260,336	1,950,000			2,256,274
Unamortized debt premium/(discount) and issuance costs	—		8,269	(28,411	)		(20,142	)
Total	$	98,144	555,535	3,186,589			3,840,268

⁽¹⁾ Includes unsecured public debt and unsecured credit facilities.
⁽²⁾ On April 2, 2018, the Company redeemed its outstanding $150.0 million 6.0% senior unsecured public notes, due June 15, 2020, for a redemption price of $163.2 million, including accrued and unpaid interest through the redemption date and a make-whole amount.

Derivatives (Tables)

3 Months Ended

Mar. 31, 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		Bank Pays Variable Rate of	Regency Pays Fixed Rate of	March 31, 2018		December 31, 2017
4/3/17	12/2/20	$	300,000	1 Month LIBOR with Floor	1.824%	$	4,690	1,804
8/1/16	1/5/22	265,000		1 Month LIBOR with Floor	1.053%	13,969		10,744
4/7/16	4/1/23	20,000		1 Month LIBOR	1.303%	1,130		801
12/1/16	11/1/23	33,000		1 Month LIBOR	1.490%	1,779		1,166
6/2/17	6/2/27	37,500		1 Month LIBOR with Floor	2.366%	879		(177	)
						$	22,447	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 Accumulated OCI 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 March 31,					Three months ended March 31,					Three months ended March 31,
(in thousands)	2018		2017			2018		2017			2018		2017
Interest rate swaps	$	9,505	(68	)	Interest expense	$	2,138	(2,654	)	Interest expense, net	$	36,785	27,199

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Summary of balance sheet fair values



	March 31, 2018			December 31, 2017
(in thousands)	Carrying Amount		Fair Value	Carrying Amount		Fair Value
Financial assets:
Notes receivable	$	16,316	16,345	$	15,803	15,660
Financial liabilities:
Notes payable	$	3,276,888	3,291,803	$	2,971,715	3,058,044
Unsecured credit facilities	$	563,380	565,000	$	623,262	625,000

Fair Value, Interest rate ranges

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 March 31, 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	$	33,631	33,631	—	—
Available-for-sale debt securities	8,852		—	8,852	—
Interest rate derivatives	22,447		—	22,447	—
Total	$	64,930	33,631	31,299	—



	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]

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

Fair Value Measurements as of March 31, 2018

(in thousands)

Quoted Prices in Active Markets for Identical Assets

Significant Other Observable Inputs

Significant Unobservable Inputs

Total Gains

Assets:

Balance

(Level 1)

(Level 2)

(Level 3)

(Losses)

Long-lived assets held and used

Operating property

27,936

—

27,936

—

(15,680

)

Equity and Capital (Tables)

3 Months Ended

Mar. 31, 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 Interest							Noncontrolling Interest					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	(88		)	32		(56	)	21		—	21		(35	)
Amounts reclassified from accumulated other comprehensive income ⁽¹⁾	2,610			—		2,610		44		—	44		2,654
Current period other comprehensive income, net	2,522			32		2,554		65		—	65		2,619
Balance as of March 31, 2017	$	(15,805	)	13		(15,792	)	(236	)	—	(236	)	(16,028	)

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

	Controlling Interest							Noncontrolling Interest					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⁾	(14		)	—		(14	)	—		—	—		(14	)
Adjusted balance as of December 31, 2017	(6,276		)	(27	)	(6,303	)	(112	)	—	(112	)	(6,415	)
Other comprehensive income before reclassifications	9,003			(119	)	8,884		502		—	502		9,386
Amounts reclassified from accumulated other comprehensive income ⁽¹⁾	2,157			—		2,157		(19	)	—	(19	)	2,138
Current period other comprehensive income, net	11,160			(119	)	11,041		483		—	483		11,524
Balance as of March 31, 2018	$	4,884		(146	)	4,738		371		—	371		5,109

⁽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 accumulated other comprehensive income for previously recognized hedge ineffectiveness from off-market hedges, as further discussed in note 1.

Schedule of amounts reclassified out of accumulated other comprehensive loss

Non-Qualified Deferred Compensation Plan (Tables)

3 Months Ended

Mar. 31, 2018

Compensation and Retirement Disclosure [Abstract]

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



(in thousands)	March 31, 2018		December 31, 2017
Assets:
Equity securities ⁽¹⁾	$	32,609	31,662
Liabilities:
Accounts payable and other liabilities	$	32,354	31,383
⁽¹⁾ Included within Other assets in the accompanying Consolidated Balance Sheets.

Earnings per Share and Unit (Tables)

3 Months Ended

Mar. 31, 2018

Parent Company [Member]

Schedule of earnings per share

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



	Three months ended March 31,
(in thousands, except per share data)	2018		2017
Numerator:
Income (loss) from operations attributable to common stockholders - basic	$	52,660	(33,223	)
Income (loss) from operations attributable to common stockholders - diluted	$	52,660	(33,223	)
Denominator:
Weighted average common shares outstanding for basic EPS	170,704		126,649
Weighted average common shares outstanding for diluted EPS ⁽¹⁾	170,959		126,649

Income (loss) per common share – basic	$	0.31	(0.26	)
Income (loss) per common share – diluted	$	0.31	(0.26	)
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and shares issuable under the forward equity offering 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 March 31,
(in thousands, except per share data)	2018		2017
Numerator:
Income (loss) from operations attributable to common unit holders - basic	$	52,771	(33,242	)
Income (loss) from operations attributable to common unit holders - diluted	$	52,771	(33,242	)
Denominator:
Weighted average common units outstanding for basic EPU	171,054		126,803
Weighted average common units outstanding for diluted EPU ⁽¹⁾	171,309		126,803

Income (loss) per common unit – basic	$	0.31	(0.26	)
Income (loss) per common unit – diluted	$	0.31	(0.26	)
⁽¹⁾ Includes the dilutive impact of unvested restricted stock and the forward equity offering using the treasury stock method.

Organization and Principles of Consolidation (Details)	3 Months Ended
Organization and Principles of Consolidation (Details)	Mar. 31, 2018 retail_shopping_center
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Document Period End Date	Mar. 31, 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	311
Unconsolidated Properties [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Real Estate Properties	118
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)
$ in Thousands

3 Months Ended

Mar. 31, 2018

USD ($)

retail_shopping_center

Dec. 31, 2017

USD ($)

Accounting Policies [Abstract]

Schedule of Variable Interest Entities

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



(in thousands)	March 31, 2018		December 31, 2017
Assets
Net real estate investments	$	185,118	172,736
Cash and cash equivalents	4,733		4,993
Liabilities
Notes payable	18,296		16,551
Equity
Limited partners’ interests in consolidated partnerships	17,658		17,572

Variable Interest Entity [Line Items]

Document Period End Date

Mar. 31, 2018

Variable Interest Entity, Consolidated, Carrying Amount, Liabilities

$ 18,296

$ 16,551

Noncontrolling Interest in Variable Interest Entity

$ 17,658

17,572

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

Real Estate [Member]

Variable Interest Entity [Line Items]

Variable Interest Entity, Consolidated, Carrying Amount, Assets

$ 185,118

172,736

Cash and Cash Equivalents [Member]

Variable Interest Entity [Line Items]

Variable Interest Entity, Consolidated, Carrying Amount, Assets

$ 4,733

$ 4,993

Partially Owned Properties [Member]

Variable Interest Entity [Line Items]

Number of Real Estate Properties | retail_shopping_center

129

Consolidated Properties [Member]

Variable Interest Entity [Line Items]

Number of Real Estate Properties | retail_shopping_center

Organization and Principles of Consolidation Revenues and Tenant and Other Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
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			$ 30,903
Parent Company [Member]
Schedule of management, transaction, and other fees [Line Items]
Accounts Receivable, Net	$ 159,587		170,985
Management Fees Revenue	7,158	$ 6,706
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			30,903
Parent Company [Member] \| Other transaction fees [Member]
Schedule of management, transaction, and other fees [Line Items]
Management Fees Revenue	1,002	670
Parent Company [Member] \| Management, transaction, and other fee [Member]
Schedule of management, transaction, and other fees [Line Items]
Accounts Receivable, Net	9,300		$ 8,700
Parent Company [Member] \| Property management services [Member]
Schedule of management, transaction, and other fees [Line Items]
Management Fees Revenue	3,768	3,418
Parent Company [Member] \| Asset management services [Member]
Schedule of management, transaction, and other fees [Line Items]
Management Fees Revenue	1,703	1,789
Parent Company [Member] \| Leasing services [Member]
Schedule of management, transaction, and other fees [Line Items]
Management Fees Revenue	685	$ 829
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

Organization and Principles of Consolidation Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
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		$ 30,903
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	1,300	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	$ 400	$ 1,200

- Definition

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

+ References + Details

Real Estate Investments Land, buildings, and improvements (Details) - Parent Company [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Land	$ 4,240,213	$ 4,235,032
Land Improvements	596,729	556,140
Buildings	5,088,332	4,999,378
Building improvements	843,105	787,880
Property, Plant and Equipment, Gross	$ 10,768,379	$ 10,578,430

Real Estate Investments Business Acquisitions (Details) shares in Thousands, $ in Thousands		3 Months Ended
	Mar. 01, 2017 USD ($) property shares	Mar. 31, 2018 USD ($) shares	Mar. 31, 2017 USD ($)
Business Acquisition [Line Items]
Purchase Price		$ 123,230	$ 9,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		$ 9,700	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		$ 9,929	0
Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Intangible assets		$ 6,123	$ 0
Ballard Blocks I [Member]
Business Acquisition [Line Items]
Date Purchased		Jan. 02, 2018
Property Name		Ballard in 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 in 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		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
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
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	Mar. 31, 2018	Mar. 31, 2017	Mar. 01, 2017
Business Acquisition [Line Items]
Total liabilities assumed	$ 9,700	$ 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) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares
Business Acquisition, Pro Forma Information [Line Items]
Business Acquisition, Pro Forma Revenue	$ 265,174
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax	67,397
Business Acquisition, Pro Forma Net Income (Loss)	$ 54,809
Business Acquisition, Pro Forma Earnings Per Share, Basic \| $ / shares	$ 0.0032
Business Acquisition, Pro Forma Earnings Per Share, Diluted \| $ / shares	$ 0.0032

Property Dispositions (Details) $ in Thousands	3 Months Ended
Property Dispositions (Details) $ in Thousands	Mar. 31, 2018 USD ($) property	Mar. 31, 2017 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of real estate investments	$ 3,227	$ 1,749
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Provision for impairment	$ 374	$ 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	$ 3,227	$ 1,683
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Provision for impairment	$ (16,054)	$ 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	1	0
Land [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Real Estate Properties Sold \| property	0	2

Other Assets Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Current Assets [Line Items]
Goodwill	$ 330,716	$ 331,884	$ 0
Investments	42,483	41,636
Other Prepaid Expense, Current	20,218	30,332
Derivative Asset	22,447	14,515
Furniture and Fixtures, Gross	6,891	6,123
Deferred Costs and Other Assets	8,426	2,637
Parent Company [Member]
Other Current Assets [Line Items]
Other Assets	$ 431,181	$ 427,127

Other Assets Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Other Assets Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill	$ 330,716	$ 331,884	$ 0
Goodwill, Other Increase (Decrease)	(253)	0
Goodwill, Impairment Loss	(1,415)	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	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt	$ 3,840,268	$ 3,594,977
Fixed Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Long-term Debt	526,048	520,193
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Long-term Debt	3,276,888	2,971,715
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total credit facilities	563,380	623,262
Long-term Debt	2,623,209	2,325,656
Line of Credit [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total credit facilities	0	60,000
Term Loan [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total credit facilities	563,380	563,262
London Interbank Offered Rate (LIBOR) [Member] \| Variable Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 127,631	$ 125,866
Contractual Rate [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.64%
Contractual Rate [Member] \| Fixed Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	5.10%
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	4.10%
Contractual Rate [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.40%
Effective Rate [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.81%
Effective Rate [Member] \| Fixed Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.43%
Effective Rate [Member] \| Variable Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.50%
Effective Rate [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.50%
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	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	$ 120,227
Long-term Debt, Maturities, Repayments of Principal in Year Two	33,044
Long-term Debt, Maturities, Repayments of Principal in Year Three	539,867
Long-term Debt, Maturities, Repayments of Principal in Year Four	328,351
Long-term Debt, Maturities, Repayments of Principal in Year Five	582,647
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,256,274
Debt Instrument, Unamortized Discount (Premium), Net	20,142
Long-term Debt	3,840,268	$ 3,594,977
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	2,623,209	$ 2,325,656
Scheduled Principal Payments [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	8,001
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	45,938
Debt Instrument, Unamortized Discount (Premium), Net	0
Long-term Debt	98,144
Mortgage Loan Maturities [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	112,226
Long-term Debt, Maturities, Repayments of Principal in Year Two	23,525
Long-term Debt, Maturities, Repayments of Principal in Year Three	78,580
Long-term Debt, Maturities, Repayments of Principal in Year Four	66,751
Long-term Debt, Maturities, Repayments of Principal in Year Five	5,848
Long-term Debt, Maturities, Repayments of Principal after Year Five	260,336
Debt Instrument, Unamortized Discount (Premium), Net	(8,269)
Long-term Debt	555,535
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	450,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	250,000
Long-term Debt, Maturities, Repayments of Principal in Year Five	565,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	1,950,000
Debt Instrument, Unamortized Discount (Premium), Net	28,411
Long-term Debt	$ 3,186,589

Notes Payable and Unsecured Credit Facilities Narrative (Details) ratio in Millions, $ in Millions	3 Months Ended
	Mar. 31, 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
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	$ 135.8

Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 9,505	$ (68)
Amount reclassified from accumulated other comprehensive loss	2,138	(2,654)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 4,400
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
Derivative, Description of Variable Rate Basis	1 Month LIBOR with Floor
Derivative, Fixed Interest Rate	2.366%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (879)
Interest Rate Cash Flow Hedge Liability at Fair Value			$ 177
Derivative $33M Swap [Member]
Derivative [Line Items]
Derivative, Inception Date	Dec. 01, 2016
Derivative, Maturity Date	Nov. 01, 2023
Derivative, Notional Amount	$ 33,000
Derivative, Description of Variable Rate Basis	1 Month LIBOR
Derivative, Fixed Interest Rate	1.49%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (1,779)		(1,166)
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
Derivative, Description of Variable Rate Basis	1 Month LIBOR with Floor
Derivative, Fixed Interest Rate	1.053%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (13,969)		(10,744)
Derivative $300M Term [Member]
Derivative [Line Items]
Derivative, Inception Date	Apr. 03, 2017
Derivative, Maturity Date	Dec. 02, 2020
Derivative, Notional Amount	$ 300,000
Derivative, Fixed Interest Rate	1.824%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (4,690)		(1,804)
Swap [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 8,400
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
Derivative, Description of Variable Rate Basis	1 Month LIBOR
Derivative, Fixed Interest Rate	1.3025%
Interest Rate Cash Flow Hedge Asset at Fair Value	$ (1,130)		(801)
Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	(22,447)		(14,515)
Interest Rate Cash Flow Hedge Liability at Fair Value			177
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	(22,447)		(14,515)
Interest Rate Cash Flow Hedge Liability at Fair Value			177
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	22,447		$ 14,338
Parent Company [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	9,505	(68)
Interest Expense	$ 36,785	$ 27,199

Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes receivable	$ 16,316		$ 15,803
Notes payable	3,276,888		2,971,715
Unsecured credit facilities	563,380		623,262
Provision for impairment	374	$ 0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	33,631		31,662
Available-for-sale Securities	8,852		9,974
Interest Rate Derivative Assets, at Fair Value	22,447		14,515
Total	64,930		56,151
Derivative instruments, at fair value			(177)
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	27,936
Provision for impairment	15,680
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	33,631		31,662
Available-for-sale Securities	0		0
Interest Rate Derivative Assets, at Fair Value	0		0
Total	33,631		31,662
Derivative instruments, at fair value			0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Payable, Fair Value	3,291,803		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]
Trading Securities	0		0
Available-for-sale Securities	8,852		9,974
Interest Rate Derivative Assets, at Fair Value	22,447		14,515
Total	31,299		24,489
Derivative instruments, at fair value			(177)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	27,936
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Receivable, Fair Value	16,345		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]
Trading Securities	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
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	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	$ 565,000		$ 625,000

Equity and Capital Equity and Capital - Common Stock (Details)	3 Months Ended
	Mar. 31, 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	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 30,903
Accumulated Other Comprehensive Income Loss [Roll Forward]
Current period other comprehensive income, net	$ 11,524	$ 2,620
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			(14)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	9,003	(88)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,262)	(18,327)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	2,157	2,610
Current period other comprehensive income, net	11,160	2,522
Ending balance	4,884	(15,805)
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	(119)	32
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	(119)	32
Ending balance	(146)	13
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			(14)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	8,884	(56)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,289)	(18,346)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	2,157	2,610
Current period other comprehensive income, net	11,041	2,554
Ending balance	4,738	(15,792)
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			0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	502	21
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(112)	(301)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(19)	44
Current period other comprehensive income, net	483	65
Ending balance	371	(236)
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			0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	502	21
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(112)	(301)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(19)	44
Current period other comprehensive income, net	483	65
Ending balance	371	(236)
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	9,386	(35)
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,401)	(18,647)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	2,138	2,654
Current period other comprehensive income, net	11,524	2,619
Ending balance	5,109	(16,028)
Partnership Interest [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	(6,289)
Current period other comprehensive income, net	11,524	$ 2,618
Ending balance	4,764
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	(6,276)
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	(6,303)
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	(112)
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	(112)
Accounting Standards Update 2017-12 [Member] \| AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Beginning balance	$ (6,415)

Stock-Based Compensation (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted \| shares	241,356
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 64.06

Non-Qualified Deferred Compensation Plan (Details) - Parent Company [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred Compensation Plan Assets	$ 32,609	$ 31,662
Deferred Compensation Liability, Current and Noncurrent	$ 32,354	$ 31,383

Earnings per Share and Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income per common unit - diluted
Weighted Average Limited Partnership Units Outstanding, Basic	349,902	154,170
Parent Company [Member]
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 52,660	$ (33,223)
Weighted average common units outstanding for basic EPU (in shares)	170,704,000	126,649,000
Weighted average common units outstanding for diluted EPU (in shares)	170,959,000	126,649,000
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Partnership Interest [Member]
Earnings Per Share [Abstract]
Weighted average common units outstanding for basic EPU (in shares)	171,054,000	126,803,000
Weighted average common units outstanding for diluted EPU (in shares)	171,309,000	126,803,000
Income per common unit - basic
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Income per common unit - diluted
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Continuing Operations [Member] \| Parent Company [Member]
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 52,660	$ (33,223)
Net income for common stock unit/holders - diluted	52,660	(33,223)
Continuing Operations [Member] \| Partnership Interest [Member]
Earnings Per Share [Abstract]
Net income attributable to common stockholders	52,771	(33,242)
Net income for common stock unit/holders - diluted	$ 52,771	$ (33,242)

Label	Element	Value
Parent Company [Member]
Cash and cash equivalents and restricted cash, beginning of period	reg_Cashandcashequivalentsandrestrictedcashbeginningofperiod	$ 17,879,000
Cash and cash equivalents and restricted cash, beginning of period	reg_Cashandcashequivalentsandrestrictedcashbeginningofperiod	49,381,000
Partnership Interest [Member]
Cash and cash equivalents and restricted cash, beginning of period	reg_Cashandcashequivalentsandrestrictedcashbeginningofperiod	$ 17,879,000
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 Statement of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Common stock/unit per share	$ 0.555	$ 0.510

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Parent Company [Member]
Capitalized interest	$ 2,179	$ 1,061
Partnership Interest [Member]
Capitalized interest	$ 2,179	$ 1,061

Commitments and Contingencies, Letters of Credit (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 50,000,000
Letters of Credit Outstanding, Amount	$ 9,400,000	$ 9,400,000

Description

Date of adoption

Effect on the financial statements or other significant matters

Revenue from Contracts with Customers (Topic 606) and related updates:

ASU 2014-09, May 2014, Revenue from Contracts with Customers (Topic 606)

ASU 2016-08, March 2016, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations

ASU 2016-10, April 2016, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing

ASU 2016-12, May 2016, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients

ASU 2016-19, December 2016, Technical Corrections and Improvements

ASU 2016-20, December 2016, Technical Corrections and Improvements to Topic 606 Revenue from Contracts With Customers

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers ("Topic 606"). The objective of Topic 606 is to establish a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. It supersedes most of the existing revenue guidance, including industry-specific guidance. The core principal of this new standard is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying Topic 606, companies will perform a five-step analysis of transactions to determine when and how revenue is recognized.

Topic 606 applies to all contracts with customers except those that are within the scope of other topics in the FASB's accounting standards codification. As a result, Topic 606 does not apply to revenue from lease contracts until the adoption of the new leases standard, Topic 842, in January 2019.

The standard allows for either "full retrospective" adoption, meaning the standard is applied to all of the periods presented, or "modified retrospective" adoption, meaning the standard is applied only to the most recent period presented in the financial statements.

January 2018

The Company utilized the modified retrospective method of adoption, applying the standard to only 2018, and not restating prior periods presented in future financial statements.

The majority of the Company's revenue originates from lease contracts and will be subject to Topic 842 to be adopted in January 2019.

Beyond revenue from lease contracts, the Company's primary revenue stream, subject to Topic 606 is Management, transaction, and other fees from the Company's real estate partnerships, primarily in the form of property management services, asset management services, and leasing services. The Company evaluated all partnership service relationships and did not identify any changes in the timing or amount of revenue recognition from these revenue streams.

The adoption of Topic 606 resulted in additional disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.