CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Earnings Less than Distributions [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interest [Member] Consolidated Joint Ventures [Member]	Noncontrolling Interest [Member] Consolidated Real Estate Fund [Member]	Noncontrolling Interest [Member] Operating Partnership [Member]
Beginning balance at Dec. 31, 2018	$ 4,891,664	$ 2,329	$ 4,201,756	$ (219,906)	$ 16,621	$ 394,995	$ 66,887	$ 428,982
Common stock, shares outstanding at Dec. 31, 2018		233,136,000
Net income (loss)	(29,603)			(36,899)		11,022	313	(4,039)
Common shares issued upon redemption of common units		$ 14	24,016
Common shares issued upon redemption of common units, shares		1,409,000
Redemption of minority interest in operating partnerships								(24,030)
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(324)	$ 3		(327)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		46,000
Repurchases of common shares	(94,617)	$ (72)	(94,545)
Repurchases of common shares, shares		(7,159,000)
Dividends and distributions	(102,464)			(92,425)				(10,039)
Contributions from noncontrolling interests	14,989						14,989
Distributions to noncontrolling interests	(45,239)					(45,239)
Change in value of interest rate swaps	(28,069)				(25,367)			(2,702)
Settlement of interest rate swaps liabilities	11,258				8,431			2,827
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	206				144		47	15
Amortization of equity awards	23,001		2,564					20,437
Acquisition of noncontrolling interest	(9,840)						(9,840)
Reallocation of noncontrolling interest			(607)					607
Ending balance at Dec. 31, 2019	4,630,962	$ 2,274	4,133,184	(349,557)	(171)	360,778	72,396	412,058
Common stock, shares outstanding at Dec. 31, 2019		227,432,000
Net income (loss)	(19,196)			(24,704)		9,257	(1,450)	(2,299)
Common shares issued upon redemption of common units		$ 51	85,659
Common shares issued upon redemption of common units, shares		5,150,000
Redemption of minority interest in operating partnerships								(85,710)
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(332)	$ 1		(333)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		48,000
Repurchases of common shares	(120,000)	$ (138)	(119,862)
Repurchases of common shares, shares		(13,813,158)
Dividends and distributions	(89,603)			(81,799)				(7,804)
Contributions from noncontrolling interests	11,555					3,500	8,055
Distributions to noncontrolling interests	(12,717)					(12,717)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	(13,894)				(12,620)		16	(1,290)
Amortization of equity awards	19,386		1,318					18,068
Sale of a 10.0% interest in 1633 Broadway	109,573		33,230			76,343
Reallocation of noncontrolling interest			(13,356)					13,356
Ending balance at Dec. 31, 2020	$ 4,515,734	$ 2,188	4,120,173	(456,393)	(12,791)	437,161	79,017	346,379
Common stock, shares outstanding at Dec. 31, 2020	218,817,337	218,817,000
Net income (loss)	$ 2,059			(20,354)		21,538	2,893	(2,018)
Common shares issued upon redemption of common units		$ 1	960
Common shares issued upon redemption of common units, shares		59,000
Redemption of minority interest in operating partnerships								(961)
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(235)	$ 1		(236)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		116,000
Repurchases of common shares, shares		0
Dividends and distributions	(67,578)			(61,310)				(6,268)
Contributions from noncontrolling interests	121					121
Distributions to noncontrolling interests	(30,539)					(30,539)
Change in value of interest rate swaps	6,857				6,237			620
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	9,565				8,692		15	858
Amortization of equity awards	18,777		1,221					17,556
Reallocation of noncontrolling interest			55					(55)
Other	271		271	(552)		552
Ending balance at Dec. 31, 2021	$ 4,455,032	$ 2,190	$ 4,122,680	$ (538,845)	$ 2,138	$ 428,833	$ 81,925	$ 356,111
Common stock, shares outstanding at Dec. 31, 2021	218,991,795	218,992,000