CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands		Total		Cumulative Effect, Period of Adoption, Adjustment	[6]	Bridges at Mint Hill	Associations of Unit Owners	Total Stockholders' Equity	Total Stockholders' Equity Cumulative Effect, Period of Adoption, Adjustment	[6]	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	[6]	Accumulated Other Comprehensive (Loss)	Treasury Stock	Noncontrolling Interests	[1]	Noncontrolling Interests Bridges at Mint Hill	[1]	Noncontrolling Interests Associations of Unit Owners	[1]
Balance at the beginning of the period (in shares) at Dec. 31, 2018											43,511,473						(519,849)
Balance at the beginning of the period at Dec. 31, 2018		$ 3,238,126						$ 3,132,212			$ 436	$ 3,322,433	$ (120,341)			$ (8,126)	$ (62,190)	$ 105,914
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		74,295						73,956					73,956					339
Interest rate swaps, net of tax		(21,184)	[2]					(21,184)								(21,184)
Pension adjustment, net of tax		11						11								11
Capitalized swap interest, net of tax		(73)	[3]					(73)								(73)
Deconsolidation of noncontrolling interests						$ (3,750)	$ (2,538)													$ (3,750)		$ (2,538)
Contributions to joint ventures		84,890																84,890
Share of investee's other comprehensive income, net of tax expense (benefit)	[4]	0
Repurchase of common shares (in shares)																	(496,000)
Repurchase of common shares		(53,923)						(53,923)									$ (53,923)
Stock plan activity (in shares)											124,420						(34,411)
Stock plan activity		17,134						17,134			$ 1	21,550					$ (4,417)
Balance at the end of the period (in shares) at Dec. 31, 2019											43,635,893						(1,050,260)
Balance at the end of the period at Dec. 31, 2019		3,332,988						3,148,133			$ 437	3,343,983	(46,385)			(29,372)	$ (120,530)	184,855
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(3,173)
Net income (loss) excluding a loss attributable to redeemable noncontrolling interest		(26,054)						(26,154)					(26,154)					100
Interest rate swaps, net of tax		(23,070)	[2]					(23,070)								(23,070)
Pension adjustment, net of tax		(84)						(84)								(84)
Capitalized swap interest, net of tax	[3]	0
Reclassification of redeemable noncontrolling interest to temporary equity		(6,091)																(6,091)
Share of investee's other comprehensive income, net of tax expense (benefit)		1,002	[4]					1,002								1,002
Derecognition of 110 North Wacker, net of tax of $951	[5]	(165,509)						12,935					1			12,934		(178,444)
Issuance of common shares (in shares)											12,270,900
Issuance of common shares		593,616						593,616			$ 123	593,493
Stock plan activity (in shares)											136,021						(20,298)
Stock plan activity		8,243						8,243			$ 2	9,802					$ (1,561)
Balance at the end of the period (in shares) at Dec. 31, 2020											56,042,814						(1,070,558)
Balance at the end of the period at Dec. 31, 2020		$ 3,715,023		$ (18)				3,714,603	$ (18)		$ 562	3,947,278	(72,556)	$ (18)		(38,590)	$ (122,091)	420
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]		Accounting Standards Update 2016-13 [Member]
Net income (loss)		$ 48,924
Net income (loss) excluding a loss attributable to redeemable noncontrolling interest		56,355						56,100					56,100					255
Interest rate swaps, net of tax		17,960	[2]					17,960								17,960
Pension adjustment, net of tax		452						452								452
Capitalized swap interest, net of tax	[3]	0
Share of investee's other comprehensive income, net of tax expense (benefit)		5,721	[4]					5,721								5,721
Issuance of common shares		(5)						(5)				(5)
Repurchase of common shares (in shares)																	(1,023,284)
Repurchase of common shares		(96,620)						(96,620)									$ (96,620)
Stock plan activity (in shares)											130,462						(13,773)
Stock plan activity		11,784						11,784			$ 1	13,145					$ (1,362)
Balance at the end of the period (in shares) at Dec. 31, 2021											56,173,276						(2,107,615)
Balance at the end of the period at Dec. 31, 2021		$ 3,710,670						$ 3,709,995			$ 563	$ 3,960,418	$ (16,456)			$ (14,457)	$ (220,073)	$ 675

[1] Excludes redeemable noncontrolling interest, which is reflected in temporary equity. See Note 2 - Investments in Real Estate and Other Affiliates.

[2] Amounts are shown net of deferred tax expense of $5.1 million for the year ended December 31, 2021, deferred tax benefit of $5.3 million for the year ended December 31, 2020, and deferred tax benefit of $6.2 million for the year ended December 31, 2019.

[3] The deferred tax impact was not meaningful for the years ended December 31, 2021, 2020 and 2019.

[4] Amounts are shown net of deferred tax expense of $1.6 million for the year ended December 31, 2021, and $0.3 million for the year ended December 31, 2020.

[5] Related to deconsolidation of 110 North Wacker. Refer to Note 2 - Investments in Real Estate and Other Affiliates for additional information.

[6] Related to the adoption of ASU 2016-13, Financial Instruments-Credit Losses (Topic 326) and all its related amendments as of January 1, 2020.