CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) - 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, 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	5,226			3,348		1,514	23	341
Common shares issued upon redemption of common units		$ 51	85,260
Common shares issued upon redemption of common units		5,126,000
Redemption of minority interest in operating partnerships								(85,311)
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(309)	$ 3		(312)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		49,000
Repurchases of common shares	(100,000)	$ (109)	(99,891)
Repurchases of common shares, shares		(10,856,865)
Dividends and distributions	(24,342)			(22,246)				(2,096)
Contributions from noncontrolling interests	8,055						8,055
Distributions to noncontrolling interests	(3,172)					(3,172)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	(14,661)				(13,307)		2	(1,356)
Amortization of equity awards	5,433		398					5,035
Reallocation of noncontrolling interest			(16,664)					16,664
Ending balance at Mar. 31, 2020	4,507,192	$ 2,219	4,102,287	(368,767)	(13,478)	359,120	80,476	345,335
Common stock, shares outstanding at Mar. 31, 2020		221,750,000
Beginning 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
Repurchases of common shares	(120,000)
Repurchases of common shares, shares		(13,813,158)
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	$ 1,884			(3,578)		5,728	85	(351)
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(200)	$ 1		(201)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		133,000
Repurchases of common shares, shares		0
Dividends and distributions	(16,889)			(15,327)				(1,562)
Contributions from noncontrolling interests	121					121
Distributions to noncontrolling interests	(4,625)					(4,625)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	4,384				3,982		12	390
Amortization of equity awards	5,526		307					5,219
Reallocation of noncontrolling interest			(9,336)					9,336
Other				(552)		552
Ending balance at Mar. 31, 2021	$ 4,505,935	$ 2,189	$ 4,111,144	$ (476,051)	$ (8,809)	$ 438,937	$ 79,114	$ 359,411
Common stock, shares outstanding at Mar. 31, 2021	218,950,596	218,950,000