Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	Dec. 31, 2012	Feb. 21, 2013	Jun. 30, 2012
Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Entity Registrant Name	REGENCY CENTERS CORP
Entity Central Index Key	0000910606
Entity well-known seasoned filer	Yes
Entity voluntary filer	No
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock Shares Outstanding		90,395,745
Public Float			$ 4,187,374,700
Partnership Interest [Member]
Entity Information [Line Items]
Entity Registrant Name	REGENCY CENTERS LP
Entity Central Index Key	0001066247
Entity Filer Category	Accelerated Filer

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Real estate investments at cost (notes 2 and 3):
Properties in development	$ 192,067	$ 224,077
Investments in real estate partnerships (note 4)	442,927	386,882
Restricted cash	6,500	6,000
Accounts receivable, net of allowance for doubtful accounts of $3,915 and $3,442 at December 31, 2012 and 2011, respectively	26,601	37,733
Acquired lease intangible assets, less accumulated amortization of $19,148 and $15,588 at December 31, 2012 and 2011, respectively (note 6)	42,459	27,054
Liabilities:
Acquired lease intangible liabilities, less accumulated accretion of $6,636 and $4,750 at December 31, 2012 and 2011, respectively (note 6)	20,325	12,662
Parent Company [Member]
Real estate investments at cost (notes 2 and 3):
Land	1,215,659	1,273,606
Buildings and improvements	2,502,186	2,604,229
Properties in development	192,067	224,077
Gross real estate investments at cost	3,909,912	4,101,912
Less: accumulated depreciation	782,749	791,619
Total Cost Net of Accumulated Depreciation	3,127,163	3,310,293
Investments in real estate partnerships (note 4)	442,927	386,882
Net real estate investments	3,570,090	3,697,175
Cash and cash equivalents	22,349	11,402
Restricted cash	6,472	6,050
Accounts receivable, net of allowance for doubtful accounts of $3,915 and $3,442 at December 31, 2012 and 2011, respectively	26,601	37,733
Straight-line rent receivable, net of reserve of $870 and $2,075 at December 31, 2012 and 2011, respectively	49,990	48,132
Notes receivable (note 5)	23,751	35,784
Deferred costs, less accumulated amortization of $69,224 and $71,265 at December 31, 2012 and 2011, respectively	69,506	70,204
Acquired lease intangible assets, less accumulated amortization of $19,148 and $15,588 at December 31, 2012 and 2011, respectively (note 6)	42,459	27,054
Trading securities held in trust, at fair value (note 13)	23,429	21,713
Other assets (note 9)	18,811	31,824
Total assets	3,853,458	3,987,071
Liabilities:
Notes payable (note 8)	1,771,891	1,942,440
Unsecured Debt	170,000	40,000
Accounts payable and other liabilities (note 9 and 13)	127,185	101,899
Acquired lease intangible liabilities, less accumulated accretion of $6,636 and $4,750 at December 31, 2012 and 2011, respectively (note 6)	20,325	12,662
Tenants’ security and escrow deposits and prepaid rent	18,146	20,416
Total liabilities	2,107,547	2,117,417
Stockholders’ equity (notes 11 and 12):
Preferred stock, $0.01 par value per share, 30,000,000 shares authorized; 13,000,000 and 11,000,000 Series 3-7 shares issued and outstanding at December 31, 2012 and 2011, respectively, with liquidation preferences of $25 per share	325,000	275,000
Common stock $0.01 par value per share,150,000,000 shares authorized; 90,394,486 and 89,921,858 shares issued at December 31, 2012 and 2011, respectively	904	899
Treasury stock at cost, 335,347 and 338,714 shares held at December 31, 2012 and 2011, respectively	(14,924)	(15,197)
Additional paid in capital	2,312,310	2,281,817
Accumulated other comprehensive loss	(57,715)	(71,429)
Distributions in excess of net income	(834,810)	(662,735)
Total stockholders’ equity	1,730,765	1,808,355
Noncontrolling interests (note 11):
Series D preferred units, aggregate redemption value of $50,000 at December 31, 2011	0	49,158
Exchangeable operating partnership units, aggregate redemption value of $8,348 and $6,665 at December 31, 2012 and 2011, respectively	(1,153)	(963)
Limited partners’ interests in consolidated partnerships	16,299	13,104
Total noncontrolling interests	15,146	61,299
Total equity	1,745,911	1,869,654
Total liabilities and equity	3,853,458	3,987,071
Partnership Interest [Member]
Real estate investments at cost (notes 2 and 3):
Land	1,215,659	1,273,606
Buildings and improvements	2,502,186	2,604,229
Properties in development	192,067	224,077
Gross real estate investments at cost	3,909,912	4,101,912
Less: accumulated depreciation	782,749	791,619
Total Cost Net of Accumulated Depreciation	3,127,163	3,310,293
Investments in real estate partnerships (note 4)	442,927	386,882
Net real estate investments	3,570,090	3,697,175
Cash and cash equivalents	22,349	11,402
Restricted cash	6,472	6,050
Accounts receivable, net of allowance for doubtful accounts of $3,915 and $3,442 at December 31, 2012 and 2011, respectively	26,601	37,733
Straight-line rent receivable, net of reserve of $870 and $2,075 at December 31, 2012 and 2011, respectively	49,990	48,132
Notes receivable (note 5)	23,751	35,784
Deferred costs, less accumulated amortization of $69,224 and $71,265 at December 31, 2012 and 2011, respectively	69,506	70,204
Acquired lease intangible assets, less accumulated amortization of $19,148 and $15,588 at December 31, 2012 and 2011, respectively (note 6)	42,459	27,054
Trading securities held in trust, at fair value (note 13)	23,429	21,713
Other assets (note 9)	18,811	31,824
Total assets	3,853,458	3,987,071
Liabilities:
Notes payable (note 8)	1,771,891	1,942,440
Unsecured Debt	170,000	40,000
Accounts payable and other liabilities (note 9 and 13)	127,185	101,899
Acquired lease intangible liabilities, less accumulated accretion of $6,636 and $4,750 at December 31, 2012 and 2011, respectively (note 6)	20,325	12,662
Tenants’ security and escrow deposits and prepaid rent	18,146	20,416
Total liabilities	2,107,547	2,117,417
Stockholders’ equity (notes 11 and 12):
Series D preferred units, par value $100: 500,000 units issued and outstanding at December 31, 2011	0	49,158
Preferred units of general partner, $0.01 par value per unit, 13,000,000 and 11,000,000 units issued and outstanding at December 31, 2012 and 2011, respectively, liquidation preference of $25 per unit	325,000	275,000
General partner; 90,394,486 and 89,921,858 units outstanding at December 31, 2012 and 2011, respectively	1,463,480	1,604,784
Limited partners; 177,164 units outstanding at December 31, 2012 and 2011	(1,153)	(963)
Accumulated other comprehensive loss	(57,715)	(71,429)
Total partners' capital	1,729,612	1,856,550
Noncontrolling interests (note 11):
Limited partners’ interests in consolidated partnerships	16,299	13,104
Total noncontrolling interests	16,299	13,104
Total equity	1,745,911	1,869,654
Total liabilities and equity	$ 3,853,458	$ 3,987,071

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts receivable	$ 3,915,000	$ 3,442,000
Series D preferred units, par value		50,000,000
General partner units, outstanding	90,394,486	89,921,858
Limited partner units, outstanding	177,164	177,164
Parent Company [Member]
Allowance for doubtful accounts receivable	3,915,000	3,442,000
Straight-line rent receivable allowance	870,000	2,075,000
Deferred costs accumulated amortization	69,224,000	71,265,000
Accumulated amortization of acquired lease intangible assets	19,148,000	15,588,000
Accumulated accretion of acquired lease intangible liabilities	6,636,000	4,750,000
Preferred stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred units of Series 3-5, units issued	13,000,000	11,000,000
Preferred units of Series 3-5, units outstanding	13,000,000	11,000,000
Preferred stock, liquidation preferences per share	$ 25	$ 25
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	90,394,486	89,921,858
Preferred units, aggregate redemption value	0	50,000
Exchangeable operating partnership units aggregate redemption value	8,348,000	6,665,000
Treasury stock, shares held at cost	335,347	338,714
Partnership Interest [Member]
Allowance for doubtful accounts receivable	3,915,000	3,442,000
Straight-line rent receivable allowance	870,000	2,075,000
Deferred costs accumulated amortization	69,224,000	71,265,000
Accumulated amortization of acquired lease intangible assets	19,148,000	15,588,000
Accumulated accretion of acquired lease intangible liabilities	6,636,000	4,750,000
Series D preferred units, par value	$ 0	$ 100
Series D units issued	0	500,000
Series D preferred units outstanding	0	500,000
Preferred units of general partner par value per unit	$ 0.01	$ 0.01
Preferred units of Series 3-5, units issued	13,000,000	11,000,000
Preferred units of Series 3-5, units outstanding	13,000,000	11,000,000
Preferred stock, liquidation preferences per share	$ 25	$ 25
General partner units, outstanding	90,394,486	89,913,234
Limited partner units, outstanding	177,164	177,164

Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other expense (income) [Abstract]
Provision for impairment	$ 74,800	$ 15,900	$ 23,900
Equity in income (loss) of investments in real estate partnerships (note 4)	23,807	9,643	(12,884)
Income Tax Expense (Benefit), Continuing Operations	(13,224)	(2,994)	1,333
Parent Company [Member]
Revenues:
Minimum rent	359,350	350,223	332,159
Percentage rent	3,327	2,996	2,540
Recoveries from tenants and other income	107,732	105,899	104,092
Management, transaction, and other fees	26,511	33,980	29,400
Total revenues	496,920	493,098	468,191
Operating expenses:
Depreciation and amortization	126,808	128,963	118,398
Operating and maintenance	69,900	71,707	67,514
General and administrative	61,700	56,117	61,505
Real estate taxes	55,604	54,622	52,386
Other expenses	7,246	6,719	6,297
Total operating expenses	321,258	318,128	306,100
Other expense (income) [Abstract]
Interest Expense	112,129	123,645	125,287
Provision for impairment	74,816	12,424	19,886
Early extinguishment of debt	852	0	4,243
Net investment (income) loss from deferred compensation plan, including unrealized (gains) losses of $(888), $567, and $(1,342) in 2012, 2011, and 2010, respectively (note 13)	(2,057)	206	(1,982)
Total other expense (income)	185,740	136,275	147,434
(Loss) income before equity in income (loss) of investments in real estate partnerships	(10,078)	38,695	14,657
Equity in income (loss) of investments in real estate partnerships (note 4)	23,807	9,643	(12,884)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	13,729	48,338	1,773
Income Tax Expense (Benefit), Continuing Operations	(13,224)	(2,994)	1,333
Income from continuing operations before tax	505	45,344	3,106
Discontinued operations, net (note 3):
Operating income	1,691	2,098	1,325
Gain on sale of operating properties, net	21,855	5,942	7,577
Income from discontinued operations	23,546	8,040	8,902
Income before gain on sale of real estate	24,051	53,384	12,008
Gain on sale of real estate	(2,158)	(2,404)	(993)
Net income	26,209	55,788	13,001
Noncontrolling interests:
Preferred units	629	(3,725)	(3,725)
Exchangeable operating partnership units	(106)	(103)	(84)
Limited partners’ interests in consolidated partnerships	(865)	(590)	(376)
Income attributable to noncontrolling interests	(342)	(4,418)	(4,185)
Net income attributable to the Company	25,867	51,370	8,816
Preferred stock dividends	(32,531)	(19,675)	(19,675)
Net (loss) income attributable to common stockholders	(6,664)	31,695	(10,859)
(Loss) income per common share - basic (note 14):
Continuing operations (in dollars per share)	$ (0.34)	$ 0.26	$ (0.25)
Discontinued operations (in dollars per share)	$ 0.26	$ 0.09	$ 0.11
Net income attributable to common stockholders (in dollars per share)	$ (0.08)	$ 0.35	$ (0.14)
(Loss) income per common share - diluted (note 14):
Continuing operations (in dollars per share)	$ (0.34)	$ 0.26	$ (0.25)
Discontinued operations (in dollars per share)	$ 0.26	$ 0.09	$ 0.11
Net income (loss) attributable to common stockholders (in dollars per share)	$ (0.08)	$ 0.35	$ (0.14)
Partnership Interest [Member]
Revenues:
Minimum rent	359,350	350,223	332,159
Percentage rent	3,327	2,996	2,540
Recoveries from tenants and other income	107,732	105,899	104,092
Management, transaction, and other fees	26,511	33,980	29,400
Total revenues	496,920	493,098	468,191
Operating expenses:
Depreciation and amortization	126,808	128,963	118,398
Operating and maintenance	69,900	71,707	67,514
General and administrative	61,700	56,117	61,505
Real estate taxes	55,604	54,622	52,386
Other expenses	7,246	6,719	6,297
Total operating expenses	321,258	318,128	306,100
Other expense (income) [Abstract]
Interest Expense	112,129	123,645	125,287
Provision for impairment	74,816	12,424	19,886
Early extinguishment of debt	852	0	4,243
Net investment (income) loss from deferred compensation plan, including unrealized (gains) losses of $(888), $567, and $(1,342) in 2012, 2011, and 2010, respectively (note 13)	(2,057)	206	(1,982)
Total other expense (income)	185,740	136,275	147,434
(Loss) income before equity in income (loss) of investments in real estate partnerships	(10,078)	38,695	14,657
Equity in income (loss) of investments in real estate partnerships (note 4)	23,807	9,643	(12,884)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	13,729	48,338	1,773
Income Tax Expense (Benefit), Continuing Operations	(13,224)	(2,994)	1,333
Income from continuing operations before tax	505	45,344	3,106
Discontinued operations, net (note 3):
Operating income	1,691	2,098	1,325
Gain on sale of operating properties, net	21,855	5,942	7,577
Income from discontinued operations	23,546	8,040	8,902
Income before gain on sale of real estate	24,051	53,384	12,008
Gain on sale of real estate	(2,158)	(2,404)	(993)
Net income	26,209	55,788	13,001
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(865)	(590)	(376)
Income attributable to noncontrolling interests	(865)	(590)	(376)
Net income attributable to the Company	25,344	55,198	12,625
Preferred unit distributions	(31,902)	(23,400)	(23,400)
Net (loss) income attributable to common unit holders	$ (6,558)	$ 31,798	$ (10,775)
(Loss) income per common share - basic (note 14):
Continuing operations (in dollars per share)	(0.34)	0.26	(0.25)
Discontinued operations (in dollars per share)	0.26	0.09	0.11
Net income attributable to common unit holders (in dollars per share)	(0.08)	0.35	(0.14)
(Loss) income per common share - diluted (note 14):
Continuing operations (in dollars per share)	(0.34)	0.26	(0.25)
Discontinued operations (in dollars per share)	0.26	0.09	0.11
Net Income (Loss), Per Outstanding Limited Partnership Unit, Diluted	(0.08)	0.35	(0.14)

Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other comprehensive income (loss):
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 4,245	$ 18	$ (36,556)
Partnership Interest [Member]
Net income	26,209	55,788	13,001
Other comprehensive income (loss):
Unrealized loss on derivative instruments	0	0	(61,625)
Amortization of loss on settlement of derivative instruments recognized in net income	9,466	9,467	5,575
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	4,220	11	28,363
Less: reclassification adjustment for change in fair value of derivative instruments included in net income	25	7	(3,294)
Other comprehensive income (loss)	13,711	9,485	(30,981)
Comprehensive income (loss)	39,920	65,273	(17,980)
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	865	590	376
Other comprehensive (loss) income attributable to noncontrolling interests	(31)	9	0
Comprehensive income attributable to noncontrolling interests	834	599	376
Comprehensive income (loss) attributable to the Company	39,086	64,674	(18,356)
Parent Company [Member]
Net income	26,209	55,788	13,001
Other comprehensive income (loss):
Unrealized loss on derivative instruments	0	0	(61,625)
Amortization of loss on settlement of derivative instruments recognized in net income	9,466	9,467	5,575
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	4,220	11	28,363
Less: reclassification adjustment for change in fair value of derivative instruments included in net income	25	7	(3,294)
Other comprehensive income (loss)	13,711	9,485	(30,981)
Comprehensive income (loss)	39,920	65,273	(17,980)
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	342	4,418	4,185
Other comprehensive (loss) income attributable to noncontrolling interests	(3)	29	(69)
Comprehensive income attributable to noncontrolling interests	339	4,447	4,116
Comprehensive income (loss) attributable to the Company	$ 39,581	$ 60,826	$ (22,096)

Consolidated Statement of Changes in Equity (USD $) In Thousands, unless otherwise specified	Parent Company [Member]	Partnership Interest [Member]	Preferred Stock Parent Company [Member]	Common Stock Parent Company [Member]	Treasury Stock Parent Company [Member]	Additional Paid In Capital Parent Company [Member]	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Parent Company [Member]	Accumulated Other Comprehensive Loss Partnership Interest [Member]	Distributions in Excess of Net Income Parent Company [Member]	Total Stockholders’ Equity Parent Company [Member]	Noncontrolling Interests Preferred Units Parent Company [Member]	Noncontrolling Interest Exchangeable Operating Partnership Units Parent Company [Member]	Noncontrolling Interests in Limited Partners' Interest in Consolidated Partnerships Parent Company [Member]	Noncontrolling Interests in Limited Partners' Interest in Consolidated Partnerships Partnership Interest [Member]	Total Noncontrolling Interests Parent Company [Member]	Preferred Units Partnership Interest [Member]	General Partner Preferred and Common Units Partnership Interest [Member]	Limited Partners Partnership Interest [Member]	Total Partners’ Capital Partnership Interest [Member]	Preferred Units Parent Company [Member]	Preferred Units Partnership Interest [Member]	Preferred Units Total Noncontrolling Interests Parent Company [Member]	Preferred Units Total Partners’ Capital Partnership Interest [Member]	Preferred Stock Parent Company [Member]	Preferred Stock Partnership Interest [Member]	Preferred Stock Additional Paid In Capital Parent Company [Member]	Preferred Stock General Partner Preferred and Common Units Partnership Interest [Member]	Preferred Stock Total Partners’ Capital Partnership Interest [Member]	Common Stock Parent Company [Member]	Common Stock Additional Paid In Capital Parent Company [Member]	Common Stock Accumulated Other Comprehensive Loss Parent Company [Member]	Common Stock Distributions in Excess of Net Income Parent Company [Member]	Common Stock Total Stockholders’ Equity Parent Company [Member]	Common Stock Noncontrolling Interests in Limited Partners' Interest in Consolidated Partnerships Parent Company [Member]	Common Stock Total Noncontrolling Interests Parent Company [Member]	Preferred Partner Noncontrolling Interests Preferred Units Parent Company [Member]
Beginning balance at Dec. 31, 2009	$ (1,930,607)	$ (1,930,607)	$ (275,000)	$ (815)	$ 16,509	$ (2,024,883)		$ 49,973	$ 49,973	$ 371,836	$ (1,862,380)	$ (49,158)	$ (7,321)	$ (11,748)	$ (11,748)	$ (68,227)	$ (49,158)	$ (1,912,353)	$ (7,321)	$ (1,918,859)
Stock Issued During Period, Value, Other				3	0								(7,630)																	0	7,627	0	0	7,630	0	(7,630)
Other comprehensive income (loss):
Net income	13,001	13,001	0	0	0	0		0	0	8,816	8,816	3,725	84	376	376	4,185	3,725	8,816	84	12,625
Net current-period other comprehensive income	(30,981)	(30,981)	0	0	0	0		(30,912)	(30,912)	0	(30,912)	0	(69)	0	0	(69)	0	0	(69)	(30,981)
Deferred compensation plan, net	273	(273)	0	0	(334)	607		0	0	0	273	0	0	0	0	0	0	(273)	0	(273)
Restricted stock issued, net of amortization	7,236		0	0	0	7,236		0		0	7,236	0	0	0		0
Stock Redeemed or Called During Period, Value				0	0								0																	(1,374)	(1,374)	0	0	(1,374)	0	0
Common stock issued for dividend reinvestment plan				1	0								0																	1,848	1,847	0	0	1,848	0	0
Contributions from partners	161	161	0	0	0	0		0	0	0	0	0	0	161	161	161	0	0	0	0
Distributions to partners	1,456	(152,423)	0	0	0	0		0	0	0	0	0	0	1,456	(1,456)	1,456	0	(150,499)	(468)	(150,967)
Preferred unit distributions		(23,400)							0						0		(3,725)	(19,675)	0	(23,400)
Restricted stock issued by Parent Company, net of amortization		7,236							0						0		0	7,236	0	7,236
Common units issued as a result of common stock issued by Parent Company, net of repurchases		474							0						0			474	0	474
Common units exchanged for common stock of Parent Company		0							0						0			7,630	(7,630)	0
Cash dividends declared:
Preferred stock/unit	23,400		0			0		0		19,675	19,675	3,725	0	0		3,725
Common stock/unit	150,967			0	0	0		0		150,499	150,499		468	0		468
Ending Balance at Dec. 31, 2010	(1,744,402)	(1,744,402)	(275,000)	(819)	16,175	(2,039,612)		80,885	80,885	533,194	(1,685,177)	(49,158)	762	(10,829)	(10,829)	(59,225)	(49,158)	(1,766,062)	762	(1,733,573)
Other comprehensive income (loss):
Net income	55,788	55,788	0	0	0	0		0	0	51,370	51,370	3,725	103	590	590	4,418	3,725	51,370	103	55,198
Net current-period other comprehensive income	9,485	9,485	0	0	0	0		9,456	9,456	0	9,456	0	20	9	9	29	0	0	20	9,476
Deferred compensation plan, net	(17,843)	(17,843)	0	0	(978)	(16,865)		0	0	0	(17,843)	0	0	0	0	0	0	(17,843)	0	(17,843)
Restricted stock issued, net of amortization	10,659		0	0	0	10,659		0		0	10,659	0	0	0		0
Stock Redeemed or Called During Period, Value				0	0								0																	(1,689)	(1,689)	0	0	(1,689)	0	0
Common stock issued for dividend reinvestment plan				0	0								0																	1,081	1,081	0	0	1,081	0	0
Common stock issued for stock offerings, net of issuance costs				80	0								0																	215,369	215,289	0	0	215,369	0	0
Contributions from partners	2,787	2,787	0	0	0	0		0	0	0	0	0	0	2,787	2,787	2,787	0	0	0	0
Distributions to partners	1,111	(162,671)	0	0	0	0		0	0	0	0	0	0	1,111	(1,111)	1,111	0	(161,236)	(324)	(161,560)
Preferred unit distributions		(23,400)							0						0		(3,725)	(19,675)	0	(23,400)
Restricted stock issued by Parent Company, net of amortization		10,659							0						0		0	10,659	0	10,659
Common units issued as a result of common stock issued by Parent Company, net of repurchases		214,761							0						0			214,761	0	214,761
Cash dividends declared:
Preferred stock/unit	23,400		0		0	0		0		19,675	19,675	3,725	0	0		3,725
Common stock/unit	161,560			0	0	0		0		161,236	161,236		324	0		324
Ending Balance at Dec. 31, 2011	(1,869,654)	(1,869,654)	(275,000)	(899)	15,197	(2,281,817)		71,429	71,429	662,735	(1,808,355)	(49,158)	963	(13,104)	(13,104)	(61,299)	(49,158)	(1,879,784)	963	(1,856,550)
Other comprehensive income (loss):
Net income	26,209	26,209	0	0	0	0		0	0	25,867	25,867	(629)	106	865	865	342	(629)	25,867	106	25,344
Net current-period other comprehensive income	13,711	13,711	0	0	0	0	13,714	13,714	13,714	0	13,714	0	28	(31)	(31)	(3)	0	0	28	13,742
Deferred compensation plan, net	(12)	12	0	0	(273)	261		0	0	0	(12)	0	0	0	0	0	0	12	0	12
Restricted stock issued, net of amortization	11,526		0	0	0	11,526		0		0	11,526	0	0	0		0
Stock Redeemed or Called During Period, Value				0	0								0																	(1,474)	(1,474)	0	0	(1,474)	0	0
Common stock issued for dividend reinvestment plan				0	0								0																	988	988	0	0	988	0	0
Common stock issued for stock offerings, net of issuance costs		313,900	325,000	5	0						313,900		0					313,900		313,900					313,900		(11,100)			21,542	21,537	0	0	21,542	0	0
Preferred Stock Redemption Premium	275,000		275,000			(9,277)				9,277	275,000						(48,125)				48,125	(48,125)	48,125	(48,125)		(275,000)		(275,000)	(275,000)								48,125
Contributions from partners	3,362	3,362	0	0	0	0		0	0	0	0	0	0	3,362	3,362	3,362	0	0	0	0
Distributions to partners	1,001	(166,736)	0	0	0	0		0	0	0	0	0	0	1,001	(1,001)	1,001	0	(165,411)	(324)	(165,735)
Preferred unit distributions		(23,658)							0						0		(404)	(23,254)	0	(23,658)
Restricted stock issued by Parent Company, net of amortization		11,526							0						0		0	11,526	0	11,526
Common units issued as a result of common stock issued by Parent Company, net of repurchases		21,056							0						0			21,056	0	21,056
Cash dividends declared:
Preferred stock/unit	23,658		0		0	0		0		23,254	23,254	404	0	0		404
Common stock/unit	165,735			0	0	0		0		165,411	165,411		324	0		324
Ending Balance at Dec. 31, 2012	$ (1,745,911)	$ (1,745,911)	$ (325,000)	$ (904)	$ 14,924	$ (2,312,310)		$ 57,715	$ 57,715	$ 834,810	$ (1,730,765)	$ 0	$ 1,153	$ (16,299)	$ (16,299)	$ (15,146)	$ 0	$ (1,788,480)	$ 1,153	$ (1,729,612)

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation, net of capitalization	$ 9,806	$ 9,824	$ 6,615
Equity in (income) loss of investments in real estate partnerships	(23,807)	(9,643)	12,884
Deferred income tax expense (benefit) of taxable REIT subsidiary	13,727	2,422	(860)
Cash flows from financing activities:
Net proceeds from issuance of preferred stock	313,900	0	0
Redemption of preferred stock and partnership units	(323,125)	0	0
Parent Company [Member]
Cash flows from operating activities:
Net income	26,209	55,788	13,001
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	127,839	133,756	123,933
Amortization of deferred loan cost and debt premium	12,759	12,327	8,533
Amortization and (accretion) of above and below market lease intangibles, net	(1,043)	(931)	(1,161)
Stock-based compensation, net of capitalization	9,806	9,824	6,615
Equity in (income) loss of investments in real estate partnerships	(23,807)	(9,643)	12,884
Net gain on sale of properties	(24,013)	(8,346)	(8,648)
Provision for impairment	74,816	15,883	26,615
Early extinguishment of debt	852	0	4,243
Deferred income tax expense (benefit) of taxable REIT subsidiary	13,727	2,422	(860)
Distribution of earnings from operations of investments in real estate partnerships	44,809	43,361	41,054
Settlement of derivative instruments	0	0	(63,435)
(Gain) loss on derivative instruments	(22)	54	(1,419)
Deferred compensation expense (income)	2,069	(2,136)	5,068
Realized and unrealized (gain) loss on trading securities held in trust	(2,095)	184	(2,009)
Changes in assets and liabilities:
Restricted cash	(423)	(651)	(1,778)
Accounts receivable	6,157	(3,108)	2,657
Straight-line rent receivables, net	(6,059)	(4,642)	(6,202)
Deferred leasing costs	(12,642)	(15,013)	(15,563)
Other assets	(1,079)	(3,393)	(3,821)
Accounts payable and other liabilities	10,994	(17,892)	(1,281)
Tenants’ security and escrow deposits and prepaid rent	(1,639)	9,789	33
Net cash provided by operating activities	257,215	217,633	138,459
Cash flows from investing activities:
Acquisition of operating real estate	(156,026)	(70,629)	(24,569)
Real estate development and capital improvements	(164,588)	(82,069)	(65,889)
Proceeds from sale of real estate investments	352,707	86,233	47,333
(Issuance) collection of notes receivable	(552)	(78)	883
Investments in real estate partnerships	(66,663)	(198,688)	(231,847)
Distributions received from investments in real estate partnerships	38,353	188,514	90,092
Dividends on trading securities held in trust	245	225	297
Acquisition of trading securities held in trust	(17,930)	(19,377)	(10,312)
Proceeds from sale of trading securities held in trust	18,077	18,146	9,555
Net cash provided by (used in) investing activities	3,623	(77,723)	(184,457)
Cash flows from financing activities:
Net proceeds from common stock issuance	21,542	215,369	0
Proceeds from sale of treasury stock	338	2,128	1,431
Acquisition of treasury stock	(4)	(14)	0
Dividends paid to common stockholders	(164,423)	(160,154)	(148,649)
Dividends paid to preferred stockholders	(23,254)	(19,675)	(19,675)
Proceeds from notes payable	0	1,940	6,068
Repayment of notes payable	(1,332)	(16,919)	(51,687)
Scheduled principal payments	(7,259)	(5,699)	(5,024)
Payment of loan costs	(4,544)	(6,070)	(4,361)
Payment of premium on tender offer	0	0	(4,000)
Net cash used in financing activities	(249,891)	(145,569)	(32,797)
Net increase (decrease) in cash and cash equivalents	10,947	(5,659)	(78,795)
Cash and cash equivalents at beginning of the period	11,402	17,061	95,856
Cash and cash equivalents at end of the period	22,349	11,402	17,061
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $3,686, $1,480, and $5,099 in 2012, 2011, and 2010, respectively)	115,879	128,649	127,591
Supplemental disclosure of non-cash transactions:
Common stock issued for partnership units exchanged	0	0	7,630
Real estate received through distribution in kind	0	47,512	0
Mortgage loans assumed through distribution in kind	0	28,760	0
Mortgage loans assumed for the acquisition of real estate	30,467	31,292	58,981
Real estate contributed for investments in real estate partnerships	47,500	0	0
Real estate received through foreclosure on notes receivable	12,585	0	990
Change in fair value of derivative instruments	(4,285)	18	28,363
Common stock issued for dividend reinvestment plan	988	1,081	1,847
Stock-based compensation capitalized	1,979	1,104	852
Contributions from limited partners in consolidated partnerships, net	986	2,411	132
Common stock issued for dividend reinvestment in trust	440	631	640
Contribution of stock awards into trust	819	1,132	1,142
Distribution of stock held in trust	1,191	0	51
Partnership Interest [Member]
Cash flows from operating activities:
Net income	26,209	55,788	13,001
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	127,839	133,756	123,933
Amortization of deferred loan cost and debt premium	12,759	12,327	8,533
Amortization and (accretion) of above and below market lease intangibles, net	(1,043)	(931)	(1,161)
Stock-based compensation, net of capitalization	9,806	9,824	6,615
Equity in (income) loss of investments in real estate partnerships	(23,807)	(9,643)	12,884
Net gain on sale of properties	(24,013)	(8,346)	(8,648)
Provision for impairment	74,816	15,883	26,615
Early extinguishment of debt	852	0	4,243
Deferred income tax expense (benefit) of taxable REIT subsidiary	13,727	2,422	(860)
Distribution of earnings from operations of investments in real estate partnerships	44,809	43,361	41,054
Settlement of derivative instruments	0	0	(63,435)
(Gain) loss on derivative instruments	(22)	54	(1,419)
Deferred compensation expense (income)	2,069	(2,136)	5,068
Realized and unrealized (gain) loss on trading securities held in trust	(2,095)	184	(2,009)
Changes in assets and liabilities:
Restricted cash	(423)	(651)	(1,778)
Accounts receivable	6,157	(3,108)	2,657
Straight-line rent receivables, net	(6,059)	(4,642)	(6,202)
Deferred leasing costs	(12,642)	(15,013)	(15,563)
Other assets	(1,079)	(3,393)	(3,821)
Accounts payable and other liabilities	10,994	(17,892)	(1,281)
Tenants’ security and escrow deposits and prepaid rent	(1,639)	9,789	33
Net cash provided by operating activities	257,215	217,633	138,459
Cash flows from investing activities:
Acquisition of operating real estate	(156,026)	(70,629)	(24,569)
Real estate development and capital improvements	(164,588)	(82,069)	(65,889)
Proceeds from sale of real estate investments	352,707	86,233	47,333
(Issuance) collection of notes receivable	(552)	(78)	883
Investments in real estate partnerships	(66,663)	(198,688)	(231,847)
Distributions received from investments in real estate partnerships	38,353	188,514	90,092
Dividends on trading securities held in trust	245	225	297
Acquisition of trading securities held in trust	(17,930)	(19,377)	(10,312)
Proceeds from sale of trading securities held in trust	18,077	18,146	9,555
Net cash provided by (used in) investing activities	3,623	(77,723)	(184,457)
Cash flows from financing activities:
Net proceeds from common units issued as a result of common stock issued by Parent Company	21,542	215,369	0
Proceeds from sale of treasury stock	338	2,128	1,431
Acquisition of treasury stock	(4)	(14)	0
Distributions to limited partners in consolidated partnerships, net	1,375	(735)	(1,427)
Dividends paid to common stockholders	(164,747)	(160,478)	(149,117)
Dividends paid to preferred stockholders	(23,658)	(23,400)	(23,400)
Proceeds from notes payable	0	1,940	6,068
Repayment of notes payable	(1,332)	(16,919)	(51,687)
Scheduled principal payments	(7,259)	(5,699)	(5,024)
Payment of loan costs	(4,544)	(6,070)	(4,361)
Payment of premium on tender offer	0	0	(4,000)
Net cash used in financing activities	(249,891)	(145,569)	(32,797)
Net increase (decrease) in cash and cash equivalents	10,947	(5,659)	(78,795)
Cash and cash equivalents at beginning of the period	11,402	17,061	95,856
Cash and cash equivalents at end of the period	22,349	11,402	17,061
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $3,686, $1,480, and $5,099 in 2012, 2011, and 2010, respectively)	115,879	128,649	127,591
Supplemental disclosure of non-cash transactions:
Common stock issued for partnership units exchanged	0	0	7,630
Real estate received through distribution in kind	0	47,512	0
Mortgage loans assumed through distribution in kind	0	28,760	0
Mortgage loans assumed for the acquisition of real estate	30,467	31,292	58,981
Real estate contributed for investments in real estate partnerships	47,500	0	0
Real estate received through foreclosure on notes receivable	12,585	0	990
Change in fair value of derivative instruments	(4,285)	18	28,363
Common stock issued for dividend reinvestment plan	988	1,081	1,847
Stock-based compensation capitalized	1,979	1,104	852
Contributions from limited partners in consolidated partnerships, net	986	2,411	132
Common stock issued for dividend reinvestment in trust	440	631	640
Contribution of stock awards into trust	819	1,132	1,142
Distribution of stock held in trust	1,191	0	51
Limited Partner [Member] \| Parent Company [Member]
Cash flows from financing activities:
Distributions to limited partners in consolidated partnerships, net	1,375	(735)	(1,427)
Noncontrolling Interest Exchangeable Operating Partnership Units \| Parent Company [Member]
Cash flows from financing activities:
Distributions to limited partners in consolidated partnerships, net	(324)	(324)	(468)
Noncontrolling Interests Preferred Units \| Parent Company [Member]
Cash flows from financing activities:
Distributions to limited partners in consolidated partnerships, net	(404)	(3,725)	(3,725)
Fixed Rate Unsecured Loans [Member] \| Parent Company [Member]
Cash flows from financing activities:
Repayment of fixed rate unsecured notes	(192,377)	(181,691)	(209,879)
Proceeds from issuance of fixed rate unsecured notes, net	0	0	398,599
Fixed Rate Unsecured Loans [Member] \| Partnership Interest [Member]
Cash flows from financing activities:
Repayment of fixed rate unsecured notes	(192,377)	(181,691)	(209,879)
Proceeds from issuance of fixed rate unsecured notes, net	0	0	398,599
Unsecured Credit Facilities [Member] \| Parent Company [Member]
Cash flows from financing activities:
Repayment of fixed rate unsecured notes	(620,000)	(425,000)	(240,000)
Proceeds from issuance of fixed rate unsecured notes, net	750,000	455,000	250,000
Unsecured Credit Facilities [Member] \| Partnership Interest [Member]
Cash flows from financing activities:
Repayment of fixed rate unsecured notes	(620,000)	(425,000)	(240,000)
Proceeds from issuance of fixed rate unsecured notes, net	$ 750,000	$ 455,000	$ 250,000

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Significant Accounting Policies

Organization and Principles of Consolidation

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”). At December 31, 2012, the Parent Company owned approximately 99.8% of the outstanding common Partnership Units of 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 or liabilities other than through its investment in the Operating Partnership. At December 31, 2012, the Parent Company, the Operating Partnership and their controlled subsidiaries on a consolidated basis (the "Company” or “Regency”) directly owned 204 retail shopping centers and held partial interests in an additional 144 retail shopping centers through investments in real estate partnerships (also referred to as joint ventures or co-investment partnerships).

Estimates, Risks, and Uncertainties

The preparation of the consolidated financial statements in conformity with U.S. Generally Accepted Accounting Principles (“GAAP”) requires the Company's management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities, at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The most significant estimates in the Company's financial statements relate to the carrying values of its investments in real estate including its shopping centers, properties in development and its investments in real estate partnerships, and accounts receivable, net. Although the U.S. economy is recovering, economic conditions remain challenging, and therefore, it is possible that the estimates and assumptions that have been utilized in the preparation of the consolidated financial statements could change significantly, if economic conditions were to weaken.

Consolidation

The accompanying consolidated financial statements include the accounts of the Parent Company, the Operating Partnership, its wholly-owned subsidiaries, and consolidated partnerships in which the Company has a controlling interest. Investments in real estate partnerships not controlled by the Company are accounted for under the equity method. All significant inter-company balances and transactions are eliminated in the consolidated financial statements.

Ownership of the Parent Company

The Parent Company has a single class of common stock outstanding and two series of preferred stock outstanding (“Series 6 and 7 Preferred Stock”). The dividends on the Series 6 and 7 Preferred Stock are cumulative and payable in arrears on the last day of each calendar quarter.

Ownership of the Operating Partnership

The Operating Partnership's capital includes general and limited common Partnership Units. At December 31, 2012, the Parent Company owned approximately 99.8% or 90,394,486 of the total 90,571,650 Partnership Units outstanding. Net income and distributions of the Operating Partnership are allocable to the general and limited common Partnership Units in accordance with their ownership percentages.

Investments in Real Estate Partnerships

Investments in real estate partnerships not controlled by the Company are accounted for under the equity method. The accounting policies of the real estate partnerships are similar to the Company's accounting policies. Income or loss from these real estate partnerships, which includes all operating results (including impairment losses) and gains on sales of properties within the joint ventures, is allocated to the Company in accordance with the respective partnership agreements. Such allocations of net income or loss are recorded in equity in income (loss) of investments in real estate partnerships in the accompanying Consolidated Statements of Operations. The net difference in the carrying amount of investments in real estate partnerships and the underlying equity in net assets is either accreted to income and recorded in equity in income (loss) 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, or recognized at liquidation if the joint venture agreement includes a unilateral right to elect to dissolve the real estate partnership and, upon such an election, receive a distribution in-kind, as discussed further below.

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.

The Company evaluates the structure and the substance of its investments in the real estate partnerships to determine if they are variable interest entities. The Company has concluded that these partnership investments are not variable interest entities. Further, the joint venture partners in the real estate partnerships have significant ownership rights, including approval over operating budgets and strategic plans, capital spending, sale or financing, and admission of new partners. Upon formation of the joint ventures, the Company, through the Operating Partnership, also became the managing member, responsible for the day-to-day operations of the real estate partnerships. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 810, the Company evaluated its investment in each real estate partnership and concluded that the other partners have kick-out rights and/or substantive participating rights and, therefore, the Company has concluded that the equity method of accounting is appropriate for these investments and they do not require consolidation. Under the equity method of accounting, investments in real estate partnerships are initially recorded at cost, subsequently increased for additional contributions and allocations of income, and reduced for distributions received and allocations of loss. These investments are included in the consolidated financial statements as investments in real estate partnerships.

Noncontrolling Interests

The Company consolidates all entities in which it has a controlling ownership interest. A controlling ownership interest is typically attributable to the entity with a majority voting interest. Noncontrolling interest is the portion of equity, in a subsidiary or consolidated entity, not attributable, directly or indirectly to the Company. Such noncontrolling interests are reported on the Consolidated Balance Sheets within equity or capital, but separately from stockholders' equity or partners' capital. On the Consolidated Statements of Operations, all of the revenues and expenses from less-than-wholly-owned consolidated subsidiaries are reported in net income (loss), including both the amounts attributable to the Company and noncontrolling interests. The amounts of consolidated net income (loss) attributable to the Company and to the noncontrolling interests are clearly identified on the accompanying Consolidated Statements of Operations.

Noncontrolling Interests of the Parent Company

The consolidated financial statements of the Parent Company include the following ownership interests held by owners other than the preferred and common stockholders of the Parent Company: (i) the limited Partnership Units in the Operating Partnership held by third parties (“Exchangeable operating partnership units”) and (ii) the minority-owned interest held by third parties in consolidated partnerships (“Limited partners' interests in consolidated partnerships”). The Parent Company has included all of these noncontrolling interests in permanent equity, separate from the Parent Company's stockholders' equity, in the accompanying Consolidated Balance Sheets and Consolidated Statements of Equity and Comprehensive Income (Loss). The portion of net income (loss) or comprehensive income (loss) attributable to these noncontrolling interests is included in net income (loss) and comprehensive income (loss) in the accompanying Consolidated Statements of Operations and Consolidated Statements of Comprehensive Income (Loss) of the Parent Company.

In accordance with the FASB ASC Topic 480, securities that are redeemable for cash or other assets at the option of the holder, not solely within the control of the issuer, are classified as redeemable noncontrolling interests outside of permanent equity in the Consolidated Balance Sheets. The Parent Company has evaluated the conditions as specified under the FASB ASC Topic 480 as it relates to exchangeable operating partnership units outstanding and concluded that it has the right to satisfy the redemption requirements of the units by delivering unregistered common stock. Each outstanding exchangeable operating partnership unit is exchangeable for one share of common stock of the Parent Company, and the unit holder cannot require redemption in cash or other assets. Limited partners' interests in consolidated partnerships are not redeemable by the holders. The Parent Company also evaluated its fiduciary duties to itself, its shareholders, and, as the managing general partner of the Operating Partnership, to the Operating Partnership, and concluded its fiduciary duties are not in conflict with each other or the underlying agreements. Therefore, the Parent Company classifies such units and interests as permanent equity in the accompanying Consolidated Balance Sheets and Consolidated Statements of Equity and Comprehensive Income (Loss).

Noncontrolling Interests of the Operating Partnership

The Operating Partnership has determined that Limited partners' interests in consolidated partnerships are noncontrolling interests. The Operating Partnership has included these noncontrolling interests in permanent capital, separate from partners' capital, in the accompanying Consolidated Balance Sheets and Consolidated Statements of Capital and Comprehensive Income (Loss). The portion of net income (loss) or comprehensive income (loss) attributable to these noncontrolling interests is included in net income (loss) and comprehensive income (loss) in the accompanying Consolidated Statements of Operations and Consolidated Statements Comprehensive Income (Loss) of the Operating Partnership.

(b) Revenues

The Company leases space to tenants under agreements with varying terms. Leases are accounted for as operating leases with minimum rent recognized on a straight-line basis over the term of the lease regardless of when payments are due. The Company estimates the collectibility of the accounts receivable related to base rents, straight-line rents, expense reimbursements, and other revenue taking into consideration the Company's historical write-off experience, tenant credit-worthiness, current economic trends, and remaining lease terms.

During the years ended December 31, 2012, 2011, and 2010, the Company recorded provisions for doubtful accounts of $3.0 million, $3.2 million, and $4.0 million, respectively, of which approximately $151,000 and $56,000 is included in discontinued operations for 2011 and 2010, respectively. There were no provisions for doubtful accounts included in discontinued operations in 2012.

The following table represents the components of accounts receivable, net of allowance for doubtful accounts, as of December 31, 2012 and 2011 in the accompanying Consolidated Balance Sheets (in thousands):



		2012		2011
Tenant receivables	$	4,043		4,654
CAM and tax reimbursements		17,891		26,355
Other receivables		8,582		10,166
Less: allowance for doubtful accounts		(3,915	)	(3,442	)
Total	$	26,601		37,733

Substantially all of the lease agreements with anchor tenants contain provisions that provide for additional rents based on tenants' sales volume ("percentage rent"). Percentage rents are recognized when the tenants achieve the specified targets as defined in their lease agreements. Substantially all lease agreements contain provisions for reimbursement of the tenants' share of real estate taxes, insurance and common area maintenance (“CAM”) costs. Recovery of real estate taxes, insurance, and CAM costs are recognized as the respective costs are incurred in accordance with the lease agreements.

As part of the leasing process, the Company may provide the lessee with an allowance for the construction of leasehold improvements. These leasehold improvements are capitalized and recorded as tenant improvements, and depreciated over the shorter of the useful life of the improvements or the remaining lease term. If the allowance represents a payment for a purpose other than funding leasehold improvements, or in the event the Company is not considered the owner of the improvements, the allowance is considered to be a lease incentive and is recognized over the lease term as a reduction of minimum rent. Factors considered during this evaluation include, among other things, who holds legal title to the improvements as well as other controlling rights provided by the lease agreement and provisions for substantiation of such costs (e.g. unilateral control of the tenant space during the build-out process). Determination of the appropriate accounting for the payment of a tenant allowance is made on a lease-by-lease basis, considering the facts and circumstances of the individual tenant lease. When the Company is the owner of the leasehold improvements, recognition of lease revenue commences when the lessee is given possession of the leased space upon completion of tenant improvements. However, when the leasehold improvements are owned by the tenant, the lease inception date is the date the tenant obtains possession of the leased space for purposes of constructing its leasehold improvements.

Profits from sales of real estate are recognized under the full accrual method by the Company when: (i) a sale is consummated; (ii) the buyer's initial and continuing investment is adequate to demonstrate a commitment to pay for the property; (iii) the Company's receivable, if applicable, is not subject to future subordination; (iv) the Company has transferred to the buyer the usual risks and rewards of ownership; and (v) the Company does not have substantial continuing involvement with the property.

The Company sells shopping centers to joint ventures in exchange for cash equal to the fair value of the ownership interest of its partners. The Company accounts for those sales as “partial sales” and recognizes gains on those partial sales in the period the properties were sold to the extent of the percentage interest sold, and in the case of certain real estate partnerships, applies a more restrictive method of recognizing gains, as discussed further below. The gains and operations associated with properties sold to these real estate partnerships are not classified as discontinued operations because the Company continues to partially own and manage these shopping centers.

As of December 31, 2012, six of the Company's joint ventures (“DIK-JV”) give each partner the unilateral right to elect to dissolve the real estate partnership and, upon such an election, receive a distribution in-kind (“DIK”) of the assets of the real estate partnership equal to their respective capital account, which could include properties the Company previously sold to the real estate partnership. The liquidation provisions require that all of the properties owned by the real estate partnership be appraised to determine their respective fair values. As a general rule, if the Company initiates the liquidation process, its partner has the right to choose the first property that it will receive with the Company choosing the next property that it will receive in liquidation. If the Company's partner initiates the liquidation process, the order of the selection process is reversed. The process then continues with an alternating selection of properties by each partner until the balance of each partner's capital account, on a fair value basis, has been distributed. After the final selection, to the extent that the fair value of properties in the DIK-JV are not distributable in a manner that equals the balance of each partner's capital account, a cash payment would be made to the other partner by the partner receiving a property distribution in excess of its capital account. The partners may also elect to liquidate some or all of the properties through sales rather than through the DIK process.

Because the contingency associated with the possibility of receiving a particular property back upon liquidation is not satisfied at the property level, but at the aggregate level, no deferred gain is recognized on property sold by the DIK-JV to a third party or received by the Company upon actual dissolution. Instead, the property received upon dissolution is recorded at the carrying value of the Company's investment in the DIK-JV on the date of dissolution.

The Company is engaged under agreements with its joint venture partners to provide asset management, property management, leasing, investing, and financing services for such 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 as services are rendered, when fees due are determinable, and collectibility is reasonably assured. The Company also receives transaction fees, as contractually agreed upon with a joint venture, which include fees such as acquisition fees, disposition fees, “promotes”, or “earnouts”.

Land, buildings, and improvements are recorded at cost. All specifically identifiable costs related to development activities are capitalized into properties in development on the accompanying Consolidated Balance Sheets. Properties in development are defined as properties that are in the construction or initial lease-up phase and have not reached their initial full occupancy. Once a development property is substantially complete and held available for occupancy, costs are no longer capitalized. The capitalized costs include pre-development costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, and allocated direct employee costs incurred during the period of development. Interest costs are capitalized into each development project based upon applying the Company's weighted average borrowing rate to that portion of the actual development costs expended. The Company discontinues interest cost capitalization when the property is no longer being developed or is available for occupancy upon substantial completion of tenant improvements, but in no event would the Company capitalize interest on the project beyond 12 months after substantial completion of the building shell.

The following table represents the components of properties in development as of December 31, 2012 and 2011 in the accompanying Consolidated Balance Sheets (in thousands):



		2012	2011
Construction in process	$	133,153	50,903
Construction complete and in lease-up		—	76,301
Land held for future development		58,914	96,873
Total	$	192,067	224,077

Construction in process represents developments where the Company has not yet incurred at least 90% of the expected costs to complete and the anchor tenant has not yet been open for at least two calendar years. Construction complete and in lease-up represents developments where the Company has incurred at least 90% of the estimated costs to complete and the anchor tenant has not yet been open for at least two calendar years, but is still completing lease-up and final tenant build out. Land held for future development represents projects not in construction, but identified and available for future development if and when the market demand for a new shopping center exists.

The Company incurs costs prior to land acquisition including contract deposits, as well as legal, engineering, and other external professional fees related to evaluating the feasibility of developing a shopping center. These pre-development costs are included in properties in development in the accompanying Consolidated Balance Sheets. At December 31, 2012 and 2011, the Company had capitalized pre-development costs of $3.5 million and $2.1 million, respectively, of which $2.3 million and $1.0 million, respectively, were refundable deposits. If the Company determines that the development of a particular shopping center is no longer probable, any related pre-development costs previously capitalized are immediately expensed in other expenses in the accompanying Consolidated Statements of Operations. During the years ended December 31, 2012, 2011, and 2010, the Company expensed pre-development costs of approximately $1.5 million, $241,000, and $520,000, respectively, in other expenses in the accompanying Consolidated Statements of Operations.

Maintenance and repairs that do not improve or extend the useful lives of the respective assets are recorded in operating and maintenance expense.

Depreciation is computed using the straight-line method over estimated useful lives of approximately 40 years for buildings and improvements, the shorter of the useful life or the remaining lease term subject to a maximum of 10 years for tenant improvements, and three to seven years for furniture and equipment.

The Company and the real estate partnerships account for business combinations using the acquisition method by recognizing and measuring the identifiable assets acquired, the liabilities assumed, and any noncontrolling interest in the acquiree at their acquisition date fair values. The Company expenses transaction costs associated with business combinations in the period incurred.

The Company's methodology includes estimating an “as-if vacant” fair value of the physical property, which includes land, building, and improvements. In addition, the Company determines the estimated fair value of identifiable intangible assets, considering the following three categories: (i) value of in-place leases, (ii) above and below-market value of in-place leases, and (iii) customer relationship value.

The value of in-place leases is estimated based on the value associated with the costs avoided in originating leases compared to the acquired in-place leases as well as the value associated with lost rental and recovery revenue during the assumed lease-up period. The value of in-place leases is recorded to amortization expense over the remaining initial term of the respective leases.

Above-market and below-market in-place lease values for acquired properties are recorded based on the present value of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management's estimate of fair market lease rates for comparable in-place leases, measured over a period equal to the remaining non-cancelable term of the lease. The value of above-market leases is amortized as a reduction of minimum rent over the remaining terms of the respective leases and the value of below-market leases is accreted to minimum rent over the remaining terms of the respective leases, including below-market renewal options, if applicable. The Company does not assign value to customer relationship intangibles if it has pre-existing business relationships with the major retailers at the acquired property since they do not provide incremental value over the Company's existing relationships.

The Company classifies an operating property or a property in development as held-for-sale upon satisfaction of the following criteria: (i) management commits to a plan to sell a property (or group of properties), (ii) the property is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such properties, (iii) an active program to locate a buyer and other actions required to complete the plan to sell the property have been initiated, (iv) the sale of the property is probable and transfer of the asset is expected to be completed within one year, (v) the property is being actively marketed for sale at a price that is reasonable in relation to its current fair value, and (vi) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

Given the nature of all real estate sales contracts, it is not unusual for such contracts to allow prospective buyers a period of time to evaluate the property prior to formal acceptance of the contract. In addition, certain other matters critical to the final sale, such as financing arrangements, often remain pending even upon contract acceptance. As a result, properties under contract may not close within the expected time period, or may not close at all. Therefore, any properties categorized as held-for-sale represent only those properties that management has determined are probable to close within the requirements set forth above. Operating properties held-for-sale are carried at the lower of cost or fair value less costs to sell. The recording of depreciation and amortization expense is suspended during the held-for-sale period. If circumstances arise that previously were considered unlikely and, as a result, the Company decides not to sell a property previously classified as held-for-sale, the property is reclassified as held and used and is measured individually at the lower of its (i) carrying amount before the property was classified as held-for-sale, adjusted for any depreciation and amortization expense that would have been recognized had the property been continuously classified as held and used or (ii) the fair value at the date of the subsequent decision not to sell. Any required adjustment to the carrying amount of the property reclassified as held and used is included in income from continuing operations in the period of the subsequent decision not to sell and the results of operations previously reported in discontinued operations are reclassified and included in income from continuing operations for all periods presented.

When the Company sells a property or classifies a property as held-for-sale and will not have significant continuing involvement in the operation of the property, the operations of the property are eliminated from ongoing operations and classified in discontinued operations. Its operations, including any mortgage interest and gain on sale, are reported in discontinued operations so that the operations are clearly distinguished. Prior periods are also reclassified to reflect the operations of the property as discontinued operations. When the Company sells an operating property to a joint venture or to a third party, and will continue to manage the property, the operations and gain on sale are included in income from continuing operations.

We evaluate whether there are any indicators, including property operating performance and general market conditions, that the value of the real estate properties (including any related amortizable intangible assets or liabilities) may not be recoverable. Through the evaluation, we compare the current carrying value of the asset to the estimated undiscounted cash flows that are directly associated with the use and ultimate disposition of the asset. Our estimated cash flows are based on several key assumptions, including rental rates, costs of tenant improvements, leasing commissions, anticipated hold period, and assumptions regarding the residual value upon disposition, including the exit capitalization rate. These key assumptions are subjective in nature and could differ materially from actual results. Changes in our disposition strategy or changes in the marketplace may alter the hold period of an asset or asset group which may result in an impairment loss and such loss could be material to the Company's financial condition or operating performance. To the extent that the carrying value of the asset exceeds the estimated undiscounted cash flows, an impairment loss is recognized equal to the excess of carrying value over fair value. If such indicators are not identified, management will not assess the recoverability of a property's carrying value. If a property previously classified as held and used is changed to held-for-sale, the Company estimates fair value, less expected costs to sell, which could cause the Company to determine that the property is impaired.

The fair value of real estate assets is highly subjective and is determined through comparable sales information and other market data if available, or through use of an income approach such as the direct capitalization method or the traditional discounted cash flow approach. Such cash flow projections consider factors such as expected future operating income, trends and prospects, as well as the effects of demand, competition and other factors, and therefore is subject to a significant degree of management judgment and changes in those factors could impact the determination of fair value. In estimating the fair value of undeveloped land, the Company generally uses market data and comparable sales information.

During the years ended December 31, 2012, 2011, and 2010, the Company established a provision for impairment on Consolidated Properties of $74.8 million, $15.9 million, and $23.9 million, respectively, of which $3.5 million and $6.7 million was included in discontinued operations for 2011 and 2010, respectively. There were no impairments included in discontinued operations in 2012. Further, the Company evaluated its property portfolio and did not identify any properties that would meet the above mentioned criteria for held-for-sale as of December 31, 2012 and 2011.

A loss in value of investments in real estate partnerships under the equity method of accounting, other than a temporary decline, must be recognized in the period in which the loss occurs. If management identifies indicators that the value of the Company's investment in real estate partnerships may be impaired, it evaluates the investment by calculating the fair value of the investment by discounting estimated future cash flows over the expected term of the investment. As a result of this evaluation, the Company established no provision for impairment during the year ended December 31, 2012, and established a provision for impairment of $4.6 million on one investment in real estate partnership during the year ended December 31, 2011 and $2.7 million on another investment in real estate partnership during the year ended December 31, 2010 .

The net tax basis of the Company's real estate assets exceeds the book basis by approximately $247.6 million and $95.1 million at December 31, 2012 and 2011, respectively, primarily due to the property impairments recorded for book purposes and the cost basis of the assets acquired and their carryover basis recorded for tax purposes.

(d) Cash and Cash Equivalents

Any instruments which have an original maturity of 90 days or less when purchased are considered cash equivalents. At December 31, 2012 and 2011, $6.5 million and $6.0 million, respectively, of cash was restricted through escrow agreements and certain mortgage loans.

(e) Notes Receivable

The Company records notes receivable at cost on the accompanying Consolidated Balance Sheets and interest income is accrued as earned and netted against interest expense in the accompanying Consolidated Statements of Operations. If a note receivable is past due, meaning the debtor is past due per contractual obligations, the Company ceases to accrue interest. However, in the event the debtor subsequently becomes current, the Company will resume accruing interest and record the interest income accordingly. The Company evaluates the collectibility of both interest and principal for all notes receivable to determine whether impairment exists using the present value of expected cash flows discounted at the note receivable's effective interest rate or, alternatively, at the observable market price of the loan or the fair value of the collateral if the loan is collateral dependent. In the event the Company determines a note receivable or a portion thereof is considered uncollectible, the Company records a provision for impairment. The Company estimates the collectibility of notes receivable taking into consideration the Company's experience in the retail sector, available internal and external credit information, payment history, market and industry trends, and debtor credit-worthiness.

(f) Deferred Costs

Deferred costs include leasing costs and loan costs, net of accumulated amortization. Such costs are amortized over the periods through lease expiration or loan maturity, respectively. If the lease is terminated early, or if the loan is repaid prior to maturity, the remaining leasing costs or loan costs are written off. Deferred leasing costs consist of internal and external commissions associated with leasing the Company's shopping centers. Net deferred leasing costs were $55.5 million and $56.5 million at December 31, 2012 and 2011, respectively. Deferred loan costs consist of initial direct and incremental costs associated with financing activities. Net deferred loan costs were $14.0 million and $13.7 million at December 31, 2012 and 2011, respectively.

(g) Derivative Financial Instruments

The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of its debt funding and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or future payment of known and uncertain cash amounts, the amount of which are determined by interest rates. The Company's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company's known or expected cash payments principally related to the Company's borrowings.

All derivative instruments, whether designated in hedging relationships or not, are recorded on the accompanying Consolidated Balance Sheets at their fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain risks, even though hedge accounting does not apply or the Company elects not to apply hedge accounting.

The Company uses interest rate swaps to mitigate its interest rate risk on a related financial instrument or forecasted transaction, and the Company designates these interest rate swaps as cash flow hedges. 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 gains or losses resulting from changes in fair value of derivatives that qualify as cash flow hedges are recognized in other comprehensive income (“OCI”) while the ineffective portion of the derivative's change in fair value is recognized in the Statements of Operations as a gain or loss on derivative instruments. Upon the settlement of a hedge, gains and losses remaining in OCI are amortized over the underlying term of the hedged transaction.

The Company formally documents all relationships between hedging instruments and hedged items, as well as its risk management objectives and strategies for undertaking various hedge transactions. The Company assesses, both at inception of the hedge and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in the cash flows and/or forecasted cash flows of the hedged items.

In assessing the valuation of the hedges, the Company uses standard market conventions and techniques such as discounted cash flow analysis, option pricing models, and termination costs at each balance sheet date. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.

The settlement of interest rate swap terminations is presented in cash flows provided by operating activities in the accompanying Consolidated Statements of Cash Flows.

(h) Income Taxes

The Parent Company believes it qualifies, and intends to continue to qualify, as a REIT under the Internal Revenue Code (the “Code”). As a REIT, the Parent Company will generally not be subject to federal income tax, provided that distributions to its stockholders are at least equal to REIT taxable income. Regency Realty Group, Inc. (“RRG”), a wholly-owned subsidiary of the Operating Partnership, is a Taxable REIT Subsidiary (“TRS”) as defined in Section 856(l) of the Code. RRG is subject to federal and state income taxes and files separate tax returns. As a pass through entity, the Operating Partnership's taxable income or loss is reported by its partners, of which the Parent Company, as general partner and approximately 99.8% owner, is allocated its pro-rata share of tax attributes.

Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using the enacted tax rates in effect for the year in which these temporary differences are expected to be recovered or settled.

Earnings and profits, which determine the taxability of dividends to stockholders, differs from net income reported for financial reporting purposes primarily because of differences in depreciable lives and cost bases of the shopping centers, as well as other timing differences.

Tax positions are initially recognized in the financial statements when it is more likely than not the position will be sustained upon examination by the tax authorities. Such tax positions shall initially and subsequently be measured as the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the tax authority assuming full knowledge of the position and relevant facts. The Company believes that it has appropriate support for the income tax positions taken and to be taken on its tax returns and that its accruals for tax liabilities are adequate for all open tax years (2009 and forward for federal and state) based on an assessment of many factors including past experience and interpretations of tax laws applied to the facts of each matter.

(i) Earnings per Share and Unit

Basic earnings per share of common stock and unit are computed based upon the weighted average number of common shares and units, respectively, outstanding during the period. Diluted earnings per share and unit reflect the conversion of obligations and the assumed exercises of securities including the effects of shares issuable under the Company's share-based payment arrangements, if dilutive. Dividends paid on the Company's share-based compensation awards are not participating securities as they are forfeitable.

(j) Stock-Based Compensation

The Company grants stock-based compensation to its employees and directors. The Company recognizes stock-based compensation based on the grant-date fair value of the award and the cost of the stock-based compensation is expensed over the vesting period.

When the Parent Company issues common shares as compensation, it receives a like number of common units from the Operating Partnership. The Company is committed to contributing to the Operating Partnership all proceeds from the exercise of stock options or other share-based awards granted under the Parent Company's Long-Term Omnibus Plan (the “Plan”). Accordingly, the Parent Company's ownership in the Operating Partnership will increase based on the amount of proceeds contributed to the Operating Partnership for the common units it receives. As a result of the issuance of common units to the Parent Company for stock-based compensation, the Operating Partnership accounts for stock-based compensation in the same manner as the Parent Company.

(k) Segment Reporting

The Company's business is investing in retail shopping centers through direct ownership or through joint ventures. The Company actively manages its portfolio of retail shopping centers and may from time to time make decisions to sell lower performing properties or developments not meeting its long-term investment objectives. The proceeds from sales are reinvested into higher quality retail shopping centers, through acquisitions or new developments, which management believes will generate sustainable revenue growth and attractive returns. It is management's intent that all retail shopping centers will be owned or developed for investment purposes; however, the Company may decide to sell all or a portion of a development upon completion. The Company's revenues and net income are generated from the operation of its investment portfolio. The Company also earns fees for services provided to manage and lease retail shopping centers owned through joint ventures.

The Company's portfolio is located throughout the United States; however, management does not distinguish or group its operations on a geographical basis for purposes of allocating resources or capital. The Company reviews operating and financial data for each property on an individual basis; therefore, the Company defines an operating segment as its individual properties. The individual properties have been aggregated into one reportable segment based upon their similarities with regard to both the nature and economics of the centers, tenants and operational processes, as well as long-term average financial performance. In addition, no single tenant accounts for 5% or more of revenue and none of the shopping centers are located outside the United States.

(l) Fair Value of Assets and Liabilities

Fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement is determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, the Company uses a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from independent sources (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the Company's own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy). The three levels of inputs used to measure fair value are as follows:


•	Level 1 - Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access.


•	Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly.


•	Level 3 - Unobservable inputs for the asset or liability, which are typically based on the Company's own assumptions, as there is little, if any, related market activity.

The Company also remeasures nonfinancial assets and nonfinancial liabilities, initially measured at fair value in a business combination or other new basis event, at fair value in subsequent periods.

(m) Recent Accounting Pronouncements

Recently Adopted

On January 1, 2012, the Company adopted Financial Accounting Standards Board ("FASB") Accounting Standards Update (“ASU”) No. 2011-04, "Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure requirements in U.S. GAAP and IFRSs" ("ASU 2011-04"). ASU 2011-04 provides new guidance concerning fair value measurements and disclosure. The new guidance is the result of joint efforts by the FASB and the International Accounting Standards Board ("IASB") to develop a single, converged fair value framework on how to measure fair value and the necessary disclosures concerning fair value measurements. The guidance is applied prospectively. The adoption by the Company resulted in expanded disclosures over fair value measurements, included in note 6.

On January 1, 2012, the Company adopted FASB ASU No. 2011-05, "Comprehensive Income (Topic 220): Presentation of Comprehensive Income" ("ASU 2011-05"). ASU 2011-05 revised guidance over the manner in which entities present comprehensive income in the financial statements. This guidance removes the previous presentation options and provides that entities must report comprehensive income in either a continuous statement of comprehensive income or two separate but consecutive statements. This guidance does not change the items that must be reported in other comprehensive income. The adoption by the Company resulted in a new Statement of Comprehensive Income (Loss), presented immediately following the Statements of Operations.

In February 2013, the FASB issued ASU No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income" ("ASU 2013-02"). ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in financial statements. This ASU requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. GAAP to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. This guidance is effective prospectively for reporting periods beginning after December 15, 2012 and early adoption is permitted. The Company has adopted this guidance as of December 31, 2012. The adoption by the Company did not have any impact on our financial results, rather resulted in adding parenthetical cross-references in our Consolidated Statements of Operations to related footnote disclosures.

Recently Issued But Not Yet Adopted

In December 2011, the FASB issued ASU No. 2011-11, "Disclosures about Offsetting Assets and Liabilities" ("ASU 2011-11"). ASU 2011-11 requires disclosures to allow investors to better compare financial statements prepared under U.S. GAAP with financial statements prepared under IFRS. The FASB expects to issue an ASU to clarify that the scope of the new disclosures is intended to be limited to derivative instruments, repurchase and reverse repurchase agreements, and securities lending arrangements. This guidance is effective for annual periods beginning January 1, 2013, and interim periods within those annual periods. Retrospective application is required. The Company does not expect this ASU to have a material effect on the Company's consolidated financial statements, rather will result in additional disclosures.

(n) Reclassifications and other

Certain prior period amounts have been reclassified to conform to current period presentation.

Notes Receivable	12 Months Ended
Notes Receivable	Dec. 31, 2012
Receivables [Abstract]
Notes Receivable	Notes Receivable The Company had notes receivable outstanding of $23.8 million and $35.8 million at December 31, 2012 and 2011, respectively. The loans have fixed interest rates ranging from 6.0% to 9.0% with maturity dates through January 2019 and are secured by real estate held as collateral.

Saving and Retirement Plans	12 Months Ended
Saving and Retirement Plans	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Saving and Retirement Plans	Saving and Retirement Plans 401 (k) Retirement Plan The Company maintains a 401(k) retirement plan covering substantially all employees, which permits participants to defer up to the maximum allowable amount determined by the IRS of their eligible compensation. This deferred compensation, together with Company matching contributions equal to 100% of employee deferrals up to a maximum of $5,000 of their eligible compensation, is fully vested and funded as of December 31, 2012. Costs related to matching portion of the plan were $1.4 million, $1.2 million, and $1.1 million for the years ended December 31, 2012, 2011, and 2010, respectively. Non-Qualified Deferred Compensation Plan The Company maintains a non-qualified deferred compensation plan (“NQDCP”) which allows select employees and directors to defer part or all of their salary, cash bonus, and restricted stock awards. Restricted stock awards that are designated to be deferred into the NQDCP upon vesting are classified as liabilities from the grant date through the vesting date. All contributions into the participants' accounts are fully vested upon contribution to the NQDCP and are deposited in a Rabbi trust. The Company accounts for the NQDCP in accordance with FASB Accounting Standards Codification ASC Topic 710 and the restricted stock awards under Topic 718. The assets in the Rabbi trust remain subject to the claims of creditors of the Company and are not the property of the participant. The NQDCP allows participants to allocate their account balance among various investments, including several mutual funds and the Company's common stock. Effective June 20, 2011, the Company amended its NQDCP such that participant account balances held in the Regency common stock fund, including future deferrals of Regency common stock, must remain allocated to the Regency common stock fund and may only be distributed to the participant in the form of Regency common stock upon termination from the plan. Additionally, participant account balances allocated to various diversified mutual funds are prohibited from being allocated into the Regency common stock fund. The assets of the Rabbi trust, exclusive of the shares of the Company's common stock, are classified as trading securities on the accompanying Consolidated Balance Sheets, and accordingly, realized and unrealized gains and losses are recognized within income from deferred compensation plan in the accompanying Consolidated Statements of Operations. Investments in shares of the Company's common stock are included, at cost, as treasury stock in the accompanying Consolidated Balance Sheets of the Parent Company and as a reduction of general partner capital in the accompanying Consolidated Balance Sheets of the Operating Partnership. The participants' deferred compensation liability, exclusive of the shares of the Company's common stock after the June 20, 2011 amendment, is included within accounts payable and other liabilities in the accompanying Consolidated Balance Sheets and was $22.8 million and $21.1 million at December 31, 2012 and 2011, respectively. Increases or decreases in the deferred compensation liability, exclusive of amounts attributable to participant investments in the shares of the Company's common stock, are recorded as general and administrative expense within the accompanying Consolidated Statements of Operations. Changes in participant account balances related to the Regency common stock fund are recorded directly within stockholders' equity.

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies 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. 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; however, it can give no assurance that existing environmental studies with respect to the shopping centers have revealed all potential environmental 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. The Company has the right to issue letters of credit under the Line up to an amount not to exceed $80.0 million which reduces the credit availability under the Line. These letters of credit are primarily issued as collateral to facilitate the construction of development projects. As of December 31, 2012 and 2011, the Company had $20.8 million and $17.4 million letters of credit outstanding, respectively.

Summary of Significant Accounting Policies - Organization and Principles of Consolidation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Operations Commenced Date	Dec. 31, 1993
General Partners' Capital Account, Units Outstanding	90,394,486	89,921,858
Partners' Capital Account, Units	90,571,650	90,099,022
Number Of Criteria Used To Determine Estimated Fair Value Of Identifiable Intangible Assets	3
Number Of Joint Ventures That Grant Each Partner A Right To Dissolve The Real Estate Partnership	6
Maximum Period Of TIme In Which Company Capitalizes Interest Costs	12 months
Restricted Cash and Cash Equivalents	$ 6,500,000	$ 6,000,000
Tax Basis of Investments, Unrealized Appreciation (Depreciation), Net	247,600,000	95,100,000
Parent Company [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Parent Company, Ownership Percentage of Outstanding Common Partnership Units of Operating Partnership	99.80%	99.80%
Restricted Cash and Cash Equivalents	$ 6,472,000	$ 6,050,000
Wholly Owned Properties [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Real Estate Properties	204
Unconsolidated Properties [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Real Estate Properties	144
Minimum [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Equity Method Investment, Accretion Period	10 years
Maximum [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Equity Method Investment, Accretion Period	40 years
Building and Improvements [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Tenant Improvements [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Furniture and Fixtures [Member] \| Minimum [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property, Plant and Equipment, Useful Life	7 years

Real Estate Investments (Details) (USD $)			12 Months Ended
Real Estate Investments (Details) (USD $)	Dec. 31, 2011 Macquarie CountryWide Regency - DESCO LLC [Member]	Dec. 31, 2010 Macquarie CountryWide Regency - DESCO LLC [Member]	Dec. 31, 2012 Wholly Owned Properties [Member]	Dec. 31, 2011 Wholly Owned Properties [Member]	Dec. 31, 2010 Wholly Owned Properties [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Shops at Erwin Mill [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Shops at Erwin Mill - Operating Component [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Grand Ridge Plaza [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Grand Ridge Plaza - Operating Component [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Balboa Mesa Shopping Center [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Sandy Springs [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Uptown District [Member]	Dec. 31, 2011 Wholly Owned Properties [Member] Ocala Corners [Member]	Dec. 31, 2011 Wholly Owned Properties [Member] Oak Shade Town Center [Member]	Dec. 31, 2011 Wholly Owned Properties [Member] Tech Ridge Center [Member]	Dec. 31, 2011 Unconsolidated Properties [Member] Macquarie CountryWide Regency - DESCO LLC [Member]	May 04, 2011 Unconsolidated Properties [Member] Macquarie CountryWide Regency - DESCO LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition						May 31, 2012		Jun. 21, 2012		Aug. 31, 2012	Dec. 21, 2012	Dec. 27, 2012	Jun. 02, 2011	Aug. 18, 2011	Sep. 26, 2011
Business Acquisition, Name of Acquired Entity						Shops at Erwin Mill		Grand Ridge Plaza		Balboa Mesa Shopping Center	Sandy Springs	Uptown District	Ocala Corners	Oak Shade Town Center	Tech Ridge Center
Business Acquisition Location, City and State						Durham, NC		Issaquah, WA		San Diego, CA	Sandy Springs, GA	San Diego, CA	Tallahassee, FL	Davis, CA	Austin, TX
Business Acquisition, Cost of Acquired Entity, Purchase Price			$ 187,984,000	$ 101,400,000		$ 5,800,000	$ 358,000	$ 20,000,000	$ 11,761,000	$ 59,500,000	$ 35,250,000	$ 81,115,000	$ 11,129,000	$ 34,871,000	$ 55,400,000
Noncash or Part Noncash Acquisition, Debt Assumed			30,467,000	31,292,000			0		12,810,000	0	17,657,000	0	5,937,000	12,456,000	12,899,000
Acquired Finite-lived Intangible Asset, Amount			20,651,000	8,563,000			0		2,346,000	9,711,000	2,761,000	5,833,000	1,724,000	2,320,000	4,519,000
Acquired Finite Lived Intangible Liability Amount			9,661,000	5,152,000			0		144,000	6,977,000	1,386,000	1,154,000	2,558,000	1,658,000	936,000
Accrual for Environmental Loss Contingencies			4,263,000	0			0		0	145,000	60,000	4,058,000	0	0	0
Equity Method Investment, Ownership Percentage	0.00%	16.35%															16.35%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest			100.00%	100.00%	100.00%
Equity Method Investment Sold, Carrying Amount																18,800,000
Disposition Fee, Income Received from Sale of Real Estate																5,000,000
Consulting Fee, Income Recognized for Sale of Real Estate																1,000,000
Acquisition Costs, Period Cost			$ 1,200,000	$ 707,000	$ 448,000

Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012 property	Dec. 31, 2011 property	Dec. 31, 2010 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sale of Real Estate									$ 73,576	$ 66,009	$ 34,918
Number of Real Estate Properties Sold									5	7	3
Revenues included in Discontinued Operations	122,002	119,432	129,243	126,243	123,596	122,419	124,038	123,045
Discontinued Operation, Tax Effect of Discontinued Operation									600	(289)	(166)
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%	100.00%
Segment, Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues included in Discontinued Operations									3,423	15,030	19,374
Operating Expenses									1,750	9,368	11,553
Other Operating Income (Expense), Net									0	3,458	6,729
Discontinued Operation, Tax Effect of Discontinued Operation									$ (18)	$ 106	$ (233)

Investments in Real Estate Partnerships - Balance Sheet Summarized Financial Information (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Investment in real estate, net	$ 3,213,984	$ 3,263,704
Acquired lease intangible assets, net	74,986	85,232
Other assets	145,984	152,839
Total assets	3,434,954	3,501,775
Notes payable	1,816,648	1,874,780
Acquired lease intangible liabilities, net	46,264	49,938
Other liabilities	70,576	67,495
Capital - Regency	518,505	512,421
Capital - Third parties	982,961	997,141
Total liabilities and capital	$ 3,434,954	$ 3,501,775

Investments in Real Estate Partnerships - Investment Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Feb. 09, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 BRE Throne Holdings LLC (BRET) [Member]	Jul. 25, 2012 BRE Throne Holdings LLC (BRET) [Member]	Dec. 31, 2011 BRE Throne Holdings LLC (BRET) [Member]
Schedule of Equity Method Investments [Line Items]
Capital - Regency		$ 518,505	$ 512,421	$ 47,500		$ 0
less: Impairment		(5,880)	(5,880)
less: Ownership percentage or Restricted Gain Method deferral		(38,995)	(41,456)
less: Net book equity in excess of purchase price		(78,203)	(78,203)
Investments in real estate partnerships		$ 442,927	$ 386,882	$ 48,757	$ 47,500
Distribution rate	3.75%		7.45%	10.50%

Investments in Real Estate Partnerships - Schedule of Acquisitions by Real Estate Partnerships (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Calhoun Commons [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Jul. 01, 2011
Business Acquisition, Name of Acquired Entity		Calhoun Commons
Business Acquisition Location, City and State		Minneapolis, MN
Rockridge Center [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Aug. 08, 2011
Business Acquisition, Name of Acquired Entity		Rockridge Center
Business Acquisition Location, City and State		Plymouth, MN
GRI - Regency, LLC [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage	40.00%	40.00%
RegCal, LLC [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage	25.00%	25.00%
Columbia Regency Partners II, LLC [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage	20.00%	20.00%
Corporate Joint Venture [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 150,800	$ 41,520
Mortgage loans assumed for the acquisition of real estate	76,313	22,511
Acquired Finite-lived Intangible Asset, Amount	8,002	4,246
Acquired Finite Lived Intangible Liability Amount	5,062	2,362
Corporate Joint Venture [Member] \| Lake Grove Commons [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jan. 17, 2012
Business Acquisition, Name of Acquired Entity	Lake Grove Commons
Business Acquisition Location, City and State	Lake Grove, NY
Equity Method Investment, Ownership Percentage	40.00%
Business Acquisition, Cost of Acquired Entity, Purchase Price	72,500
Mortgage loans assumed for the acquisition of real estate	31,813
Acquired Finite-lived Intangible Asset, Amount	5,397
Acquired Finite Lived Intangible Liability Amount	4,342
Corporate Joint Venture [Member] \| Applewood Village Shops [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Nov. 28, 2012
Business Acquisition, Name of Acquired Entity	Applewood Village Shops
Business Acquisition Location, City and State	Wheat Ridge, CO
Equity Method Investment, Ownership Percentage	40.00%
Business Acquisition, Cost of Acquired Entity, Purchase Price	3,700
Mortgage loans assumed for the acquisition of real estate	0
Acquired Finite-lived Intangible Asset, Amount	363
Acquired Finite Lived Intangible Liability Amount	34
Corporate Joint Venture [Member] \| Village Plaza [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Dec. 19, 2012
Business Acquisition, Name of Acquired Entity	Village Plaza
Business Acquisition Location, City and State	Chapel Hill, NC
Equity Method Investment, Ownership Percentage	20.00%
Business Acquisition, Cost of Acquired Entity, Purchase Price	19,200
Mortgage loans assumed for the acquisition of real estate	0
Acquired Finite-lived Intangible Asset, Amount	2,242
Acquired Finite Lived Intangible Liability Amount	686
Corporate Joint Venture [Member] \| Shops at Erwin Mill [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Dec. 28, 2012
Business Acquisition, Name of Acquired Entity	Phillips Place
Business Acquisition Location, City and State	Charlotte, NC
Equity Method Investment, Ownership Percentage	50.00%
Business Acquisition, Cost of Acquired Entity, Purchase Price	55,400
Mortgage loans assumed for the acquisition of real estate	44,500
Acquired Finite-lived Intangible Asset, Amount	0
Acquired Finite Lived Intangible Liability Amount	0
Corporate Joint Venture [Member] \| Calhoun Commons [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		25.00%
Business Acquisition, Cost of Acquired Entity, Purchase Price		21,020
Mortgage loans assumed for the acquisition of real estate		6,052
Acquired Finite-lived Intangible Asset, Amount		2,130
Acquired Finite Lived Intangible Liability Amount		303
Corporate Joint Venture [Member] \| Rockridge Center [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		20.00%
Business Acquisition, Cost of Acquired Entity, Purchase Price		20,500
Mortgage loans assumed for the acquisition of real estate		16,459
Acquired Finite-lived Intangible Asset, Amount		2,116
Acquired Finite Lived Intangible Liability Amount		$ 2,059
Corporate Joint Venture [Member] \| GRI - Regency, LLC [Member] \| Lake Grove Commons [Member]
Business Acquisition [Line Items]
Business Acquisition, Description of Acquired Entity	GRIR
Corporate Joint Venture [Member] \| GRI - Regency, LLC [Member] \| Applewood Village Shops [Member]
Business Acquisition [Line Items]
Business Acquisition, Description of Acquired Entity	GRIR
Corporate Joint Venture [Member] \| RegCal, LLC [Member] \| Calhoun Commons [Member]
Business Acquisition [Line Items]
Business Acquisition, Description of Acquired Entity		RegCal
Corporate Joint Venture [Member] \| Columbia Regency Partners II, LLC [Member] \| Village Plaza [Member]
Business Acquisition [Line Items]
Business Acquisition, Description of Acquired Entity	Columbia II
Corporate Joint Venture [Member] \| Columbia Regency Partners II, LLC [Member] \| Rockridge Center [Member]
Business Acquisition [Line Items]
Business Acquisition, Description of Acquired Entity		Columbia II
Corporate Joint Venture [Member] \| Johnny Harris [Member] \| Shops at Erwin Mill [Member]
Business Acquisition [Line Items]
Business Acquisition, Description of Acquired Entity	Other

Investments in Real Estate Partnerships - Scheduled Principal Payments (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 43,549,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Two	95,964,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Three	152,691,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Four	393,396,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Five	219,072,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal After Year Five	910,719,000
Unamortized debt premiums, net	1,257,000
Equity Method Investment, Summarized Financial Information, Notes Payable	1,816,648,000	1,874,780,000
2013	24,191,000
2014	184,382,000
2015	418,181,000
2016	189,648,000
2017	488,959,000
Beyond 5 Years	632,764,000
Unamortized debt discounts (premiums)	3,766,000
Long-term Debt	1,941,891,000	1,982,440,000
Scheduled Principal Payments [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	19,176,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Two	21,289,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Three	21,895,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Four	19,139,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Five	18,437,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal After Year Five	77,039,000
Unamortized debt premiums, net	0
Equity Method Investment, Summarized Financial Information, Notes Payable	176,975,000
2013	7,872,000
2014	7,383,000
2015	5,746,000
2016	5,487,000
2017	4,584,000
Beyond 5 Years	20,021,000
Unamortized debt discounts (premiums)	0
Long-term Debt	51,093,000
Mortgage Loan Maturities [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	24,373,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Two	53,015,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Three	130,796,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Four	374,257,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Five	200,635,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal After Year Five	833,680,000
Unamortized debt premiums, net	1,257,000
Equity Method Investment, Summarized Financial Information, Notes Payable	1,618,013,000
2013	16,319,000
2014	26,999,000
2015	62,435,000
2016	14,161,000
2017	84,375,000
Beyond 5 Years	212,743,000
Unamortized debt discounts (premiums)	5,830,000
Long-term Debt	422,862,000
Unsecured Maturities [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Two	21,660,000
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Equity Method Investment, Summarized Financial Information, Long-term Debt, Maturities, Repayments of Principal After Year Five	0
Unamortized debt premiums, net	0
Equity Method Investment, Summarized Financial Information, Notes Payable	21,660,000
2013	0
2014	150,000,000
2015	350,000,000
2016	170,000,000
2017	400,000,000
Beyond 5 Years	400,000,000
Unamortized debt discounts (premiums)	(2,064,000)
Long-term Debt	1,467,936,000
Equity Method Investments [Member]
Schedule of Equity Method Investments [Line Items]
2013	15,949,000
2014	27,254,000
2015	49,619,000
2016	127,888,000
2017	51,610,000
Beyond 5 Years	325,272,000
Unamortized debt discounts (premiums)	(169,000)
Long-term Debt	$ 597,423,000

Notes Receivable (Details) (USD $) In Millions, unless otherwise specified			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable outstanding, value	$ 23.8	$ 35.8
Fixed interest rates on notes receivable			6.00%	9.00%

Acquired Leases Intangibles - Future Amorization and Minimum Rent, net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Amortization Expense [Abstract]
2013	$ 6,607
2014	5,076
2015	3,999
2016	3,238
2017	2,441
Net Accretion [Abstract]
2013	2,035
2014	1,588
2015	947
2016	675
2017	$ 672

Income Taxes - Textuals (Details) (USD $)	12 Months Ended
Income Taxes - Textuals (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Contingency [Line Items]
Amounts attributable to continuing operations	$ 13,224,000	$ 2,994,000	$ (1,333,000)
Income Tax Expense (Benefit)	13,824,000	2,705,000	(1,499,000)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	34.00%	34.00%	34.00%
Net change in total valuation allowancee	15,600,000	1,400,000
Operating loss carryforwards	2,900,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Income Tax Expense (Benefit)	600,000	600,000	600,000
Parent Company [Member]
Income Tax Contingency [Line Items]
Amounts attributable to continuing operations	$ 13,224,000	$ 2,994,000	$ (1,333,000)

Income Taxes - Deferred Taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Net [Abstract]
Investments in real estate partnerships	$ 8,116	$ 8,124
Provision for impairment	5,667	4,047
Deferred interest expense	4,507	4,507
Capitalized costs under Section 263A	2,637	3,828
Net operating loss carryforward	1,033	280
Employee benefits	838	683
Other	435	791
Deferred tax assets	23,233	22,260
Valuation allowance	(22,114)	(6,479)
Deferred tax assets, net	1,119	15,781
Deferred Tax Liabilities, Net [Abstract]
Straight line rent	519	1,916
Depreciation	600	138
Deferred tax liabilities	1,119	2,054
Net deferred tax assets	$ 0	$ 13,727

Notes Payable and Unsecured Credit Facilities (Details) (USD $)								12 Months Ended									12 Months Ended								12 Months Ended		3 Months Ended	12 Months Ended					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Oct. 07, 2010	Jun. 02, 2010	Dec. 31, 2012 Scheduled Principal Payments [Member]	Dec. 31, 2012 Mortgage Loan Maturities [Member]	Dec. 31, 2012 Unsecured Maturities [Member]	Dec. 31, 2012 Wholly Owned Properties [Member]	Dec. 31, 2011 Wholly Owned Properties [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Grand Ridge Plaza - Operating Component [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Sandy Springs [Member]	Dec. 31, 2012 Partnership Interest [Member]	Dec. 31, 2011 Partnership Interest [Member]	Dec. 31, 2010 Partnership Interest [Member]	Dec. 31, 2012 Notes Payable to Banks [Member]	Dec. 31, 2011 Notes Payable to Banks [Member]	Dec. 31, 2012 Fixed Rate Mortgage Loans [Member]	Dec. 31, 2011 Fixed Rate Mortgage Loans [Member]	Dec. 31, 2012 Variable Rate Mortgage Loans [Member]	Dec. 31, 2011 Variable Rate Mortgage Loans [Member]	Dec. 31, 2012 Fixed Rate Unsecured Loans [Member]	Dec. 31, 2011 Fixed Rate Unsecured Loans [Member]	Dec. 31, 2012 Unsecured Credit Facilities [Member]	Dec. 31, 2011 Unsecured Credit Facilities [Member]	Dec. 31, 2012 Secured Debt [Member]	Dec. 31, 2012 Secured Debt [Member] Partnership Interest [Member]	Mar. 31, 2011 Unsecured Debt [Member]	Dec. 31, 2012 Unsecured Debt [Member]	Dec. 31, 2012 Unsecured Debt [Member] Construction Loans [Member]	Dec. 31, 2012 Unsecured Debt [Member] General Loan [Member]	Dec. 31, 2012 Unsecured Debt [Member] Term Loan - Unsecured [Member]	Dec. 31, 2011 Unsecured Debt [Member] Term Loan - Unsecured [Member]	Dec. 31, 2012 Line of Credit [Member] Line of Credit Facility - Unsecured [Member]	Dec. 31, 2012 Variable Income Interest Rate [Member] Construction Loans [Member]
Debt Instrument [Line Items]
Secured Debt, Percent Guaranteed by Parent Company																										17.60%
Debt Instrument, Maturity Date Range, End																									Dec. 31, 2028			Dec. 31, 2021
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum																	5.22%											4.80%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum																	8.40%											6.00%
Debt, Weighted Average Interest Rate																	6.30%											5.46%
Mortgage Loans on Real Estate, Carrying Amount of Mortgages	$ 473,955,000																												$ 9,000,000	$ 3,000,000
Debt Instrument, Interest Rate Terms																														variable interest rate equal to LIBOR plus 380 basis points	variable interest rate of LIBOR plus 145 basis points			variable interest rate of LIBOR plus 160 basis points
Debt Instrument, Maturity Date																											Jan. 31, 2011		Sep. 01, 2014	Oct. 01, 2014	Dec. 15, 2016
Debt Instrument, Basis Spread on Variable Rate																														3.80%	1.45%		1.175%	1.60%
Line of Credit Facility, Commitment Fee Percentage																																	0.225%
Repayments of Long-term Debt																												192,400,000
Debt Instrument, Interest Rate, Stated Percentage			4.80%	6.00%																								7.00%
Noncash or Part Noncash Acquisition, Debt Assumed								30,467,000	31,292,000	12,810,000	17,657,000	30,467,000	31,292,000	58,981,000
Line of Credit Facility, Revolving, Maximum Borrowing Capacity																																	800,000,000
Line of Credit Facility, Increase, Additional Borrowings																																	200,000,000
Line of Credit Facility, Description																																	September 2016, subject to a one-year extension
Line of Credit Facility, Unsecured, Interest Rate Description																																	annual rate of LIBOR plus 117.5 basis points
Line of Credit Facility, Unsecured, Annual Facility Fee																																	22.5 basis points
Line of Credit Facility, Maximum Increase Allowed to Borrowing Capacity																																	1,000,000,000
Debt Instrument, Face Amount			250,000,000	150,000,000																											250,000,000
Debt Instrument, Decrease, Repayments																															150,000,000
Write off of Deferred Debt Issuance Cost																															852,000
Long-term Debt, Amount Outstanding	1,941,891,000	1,982,440,000			51,093,000	422,862,000	1,467,936,000								1,771,891,000	1,942,440,000	461,914,000	439,880,000	12,041,000	12,665,000	1,297,936,000	1,489,895,000	170,000,000	40,000,000							100,000,000	0
Debt Instrument, maximum increase allowed to borrowing capacity																															150,000,000
Maturities of Long-term Debt [Abstract]
2013	24,191,000				7,872,000	16,319,000	0
2014	184,382,000				7,383,000	26,999,000	150,000,000
2015	418,181,000				5,746,000	62,435,000	350,000,000
2016	189,648,000				5,487,000	14,161,000	170,000,000
2017	488,959,000				4,584,000	84,375,000	400,000,000
Beyond 5 Years	632,764,000				20,021,000	212,743,000	400,000,000
Unamortized debt discounts (premiums)	3,766,000				0	5,830,000	(2,064,000)
Long-term Debt	1,941,891,000	1,982,440,000			51,093,000	422,862,000	1,467,936,000								1,771,891,000	1,942,440,000	461,914,000	439,880,000	12,041,000	12,665,000	1,297,936,000	1,489,895,000	170,000,000	40,000,000							100,000,000	0
Line of Credit Facility, Amount Outstanding																																	$ 70,000,000

Derivative Financial Instruments - Fair Value of Derivatives (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 4,307,000	$ 0
Derivative Liability, Fair Value, Gross Liability	76,000	37,000
Derivative @ 2.087% 75K [Member]
Derivatives, Fair Value [Line Items]
Derivative, Inception Date	Apr. 15, 2014
Derivative, Maturity Date	Apr. 15, 2024
Derivative, Notional Amount	75,000
Derivative, Description of Variable Rate Basis	3 Month LIBOR
Derivative, Fixed Interest Rate	2.087%
Derivative Asset, Fair Value, Gross Asset	1,022,000	0
Derivative @ 2.088% 50K [Member]
Derivatives, Fair Value [Line Items]
Derivative, Inception Date	Apr. 15, 2014
Derivative, Maturity Date	Apr. 15, 2024
Derivative, Notional Amount	50,000
Derivative, Description of Variable Rate Basis	3 Month LIBOR
Derivative, Fixed Interest Rate	2.088%
Derivative Asset, Fair Value, Gross Asset	672,000	0
Derivative @ 2.479% 75K [Member]
Derivatives, Fair Value [Line Items]
Derivative, Inception Date	Aug. 01, 2015
Derivative, Maturity Date	Aug. 01, 2025
Derivative, Notional Amount	75,000
Derivative, Description of Variable Rate Basis	3 Month LIBOR
Derivative, Fixed Interest Rate	2.479%
Derivative Asset, Fair Value, Gross Asset	1,131,000	0
Derivative A @ 2.479% 50K [Member]
Derivatives, Fair Value [Line Items]
Derivative, Inception Date	Aug. 01, 2015
Derivative, Maturity Date	Aug. 01, 2025
Derivative, Notional Amount	50,000
Derivative, Description of Variable Rate Basis	3 Month LIBOR
Derivative, Fixed Interest Rate	2.479%
Derivative Asset, Fair Value, Gross Asset	729,000	0
Derivative B @ 2.479% 50K [Member]
Derivatives, Fair Value [Line Items]
Derivative, Inception Date	Aug. 01, 2015
Derivative, Maturity Date	Aug. 01, 2025
Derivative, Notional Amount	50,000
Derivative, Description of Variable Rate Basis	3 Month LIBOR
Derivative, Fixed Interest Rate	2.479%
Derivative Asset, Fair Value, Gross Asset	753,000	0
.76% Derivative [Member]
Derivatives, Fair Value [Line Items]
Derivative, Inception Date	Oct. 01, 2011
Derivative, Maturity Date	Sep. 01, 2014
Derivative, Notional Amount	9,000
Derivative, Description of Variable Rate Basis	1 Month LIBOR
Derivative, Fixed Interest Rate	0.76%
Derivative Liability, Fair Value, Gross Liability	$ 76,000	$ 37,000

Derivative Financial Instruments - Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Oct. 07, 2010	Jun. 02, 2010	Jun. 01, 2010	Dec. 31, 2009
Derivative [Line Items]
Unamortized Loss on Derivative Instruments			$ 62.6	$ 72.0
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			9.5
Loss on settlement of derivative instruments	36.7	26.8
Notional Amount of Interest Rate Cash Flow Hedge Derivatives							150.0
Notional Amount of Interest Rate Derivatives					140.7			290.7
Debt Instrument, Face Amount					$ 250.0	$ 150.0
Debt Instrument, Interest Rate, Stated Percentage					4.80%	6.00%
Debt Instrument, Interest Rate, Effective Percentage					6.26%	7.67%

Fair Value Measurements - Fair Value of Financial Instruments (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Unsecured Credit Facilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Assumptions, Risk Free Interest Rate	1.60%	1.50%
Notes Receivable [Member] \| Minimum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Assumptions, Risk Free Interest Rate	6.95%	7.11%
Notes Receivable [Member] \| Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Assumptions, Risk Free Interest Rate	8.05%	8.12%
Notes Payable to Banks [Member] \| Minimum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Assumptions, Risk Free Interest Rate	2.40%	2.36%
Notes Payable to Banks [Member] \| Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Assumptions, Risk Free Interest Rate	3.25%	4.25%
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Receivable, Fair Value	$ 23,700,000	$ 35,300,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value	2,000,000,000	2,100,000,000
Fair Value, Inputs, Level 2 [Member] \| Unsecured Credit Facilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 170,200,000	$ 40,000,000

Fair Value Measurements - Level 3 Inputs (Details)	12 Months Ended
Fair Value Measurements - Level 3 Inputs (Details)	Dec. 31, 2012	Dec. 31, 2011
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	(8.30%)	2.00%
Fair Value Inputs, Discount Rate	10.50%	8.50%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	2.50%	3.00%
Fair Value Inputs, Discount Rate	10.50%	10.00%
Overall Cap Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	8.30%	7.50%
Overall Cap Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	8.50%	9.00%
Terminal Cap Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	8.80%	8.00%
Terminal Cap Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	8.80%	9.50%

Equity and Capital - Repayment of Debt (Details) (USD $) Share data in Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 09, 2011	Mar. 31, 2011
Extinguishment of Debt [Line Items]
Proceeds from Issuance or Sale of Equity	$ 215,400,000
Unsecured Debt [Member]
Extinguishment of Debt [Line Items]
Repayment of fixed rate unsecured notes	$ 161,700,000
Debt Instrument, Maturity Date		Jan. 31, 2011
Parent Company [Member]
Extinguishment of Debt [Line Items]
Forward Contract Indexed to Issuer's Equity, Settlement Date	Mar. 09, 2011
Forward Contract Indexed to Issuer's Equity, Indexed Shares	8.0

Stock-Based Compensation (Details) (USD $)	12 Months Ended
Stock-Based Compensation (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Less: Amount capitalized	$ (1,979,000)	$ (1,104,000)	$ (852,000)
Total Stock-Based Compensation	9,806,000	9,824,000	6,615,000
Number of shares authorized	4,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options, Outstanding, Beginning Balance	386,149
Stock Options, Exercised	7,619
Stock Options, Forfeited	57,952
Stock Options, Expired	4,654
Stock Options, Outstanding, Ending Balance	315,924	386,149
Stock Options, Vested and Expected to Vest	315,924
Stock Options, Exercisable	315,924
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Stock Options, Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 52.12
Stock Options, Exercised, Weighted Average Exercise Price	$ 34.34
Stock Options, Forfeited, Weighted Average Exercise Price	$ 51.36
Stock Options, Expired, Weighted Average Exercise Price	$ 72.29
Stock Options, Outstanding, Weighted Average Exercise Price, Ending Balance	$ 52.39	$ 52.12
Stock Options, Vested and Expected to Vest, Weighted Average Exercise Price	$ 52.39
Stock Options, Exercisable, Weighted Average Exercise Price	$ 52.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Stock Options, Outstanding, Weighted Average Remaining Contractual Term in Years, Beginning Balance	2 years 1 month 6 days	3 years
Stock Options, Outstanding, Weighted Average Remaining Contractual Term in Years, Ending Balance	2 years 1 month 6 days	3 years
Stock Options, Vested and Expected to Vest, Weighted Average Remaining Contractual Term in Years	2 years 1 month 6 days
Stock Options, Exercisable, Weighted Average Remaining Contractual Term in Years	2 years 1 month 6 days
Stock Options, Outstanding, Aggregate Intrinsic Value, Beginning Balance	(5,598,000)
Stock Options, Outstanding, Aggregate Intrinsic Value, Ending Balance	(1,664,000)	(5,598,000)
Stock Options, Vested and Expected to Vest, Aggregate Intrinsic Value	(1,664,000)
Stock Options, Exercisable, Aggregate Intrinsic Value	(1,664,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	92,000	130,000	1,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Number of shares available for grant	3,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	49.00%	67.00%	66.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.00%	1.00%	1.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	11,526,000	10,659,000	7,236,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Stock Options, Vested and Expected to Vest, Aggregate Intrinsic Value	6,600,000	7,500,000	6,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted Stock, Non-Vested, Shares Outstanding, Beginning Balance	562,259
Restricted Stock, Shares Vested and Distributed	152,019
Restricted Stock, Shares Forfeited	1,982
Restricted Stock, Non-Vested, Shares Outstanding, Ending Balance	674,491	562,259
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Restricted Stock, Non-Vested, Intrinsic Value	31,782,000
Restricted Stock, Shares Vested and Distributed, Weighted Average Grant Price	$ 43.13
Restricted Stock, Shares Forfeited, Weighted Average Grant Price	$ 40.34
Restricted Stock, Shares Granted, Total Weighted Average Grant Price	$ 39.44	$ 41.81	$ 35.65
Time Based Awards Granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted Stock, Shares Granted	112,496
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Restricted Stock, Shares Granted, Weighted Average Grant Price	$ 40.05
Performance Based Awards Granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted Stock, Shares Granted	25,435
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Restricted Stock, Shares Granted, Weighted Average Grant Price	$ 39.00
Award vesting period	3 years
Market Based Awards Granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted Stock, Shares Granted	128,302
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Restricted Stock, Shares Granted, Weighted Average Grant Price	$ 39.00
Award vesting period	3 years
Parent Company [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Stock-Based Compensation	9,806,000	9,824,000	6,615,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Restricted Stock, Non-Vested, Unrecognized Compensation Cost	12,800,000
Awards granted, lives	10 years
Period for recognition for compensation costs	3 years
Partnership Interest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Stock-Based Compensation	9,806,000	9,824,000	6,615,000
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 259,000	$ 269,000	$ 231,000
Minimum [Member] \| Parent Company [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Award vesting period	1 year
Maximum [Member] \| Parent Company [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Award vesting period	5 years

Saving and Retirement Plans - Non-Qualified Deferred Compensation Plan (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Deferred Compensation Liability, Current and Noncurrent	$ 22.8	$ 21.1

Operating Leases - Lessor (Details) (USD $)	12 Months Ended
Operating Leases - Lessor (Details) (USD $)	Dec. 31, 2012 employees
Operating Leases, Future Minimum Payments Receivable [Abstract]
2013	$ 332,351
2014	311,905
2015	276,784
2016	240,376
2017	196,098
Thereafter	991,272
Total	$ 2,348,786
Customer Concentration Risk - Number	0
Concentration Risk, Percentage	5.00%

Operating Leases - Lessee (Details) (USD $)	12 Months Ended
Operating Leases - Lessee (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Leases [Abstract]
Operating leases expenses	$ 9,100,000	$ 9,200,000	$ 8,100,000
Operating Leases, Future Minimum Payments Due [Abstract]
2013	7,732
2014	7,136
2015	6,713
2016	6,181
2017	4,649
Thereafter	101,613
Total	$ 134,024

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	$ 20.8	$ 17.4
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 80.0