CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) - USD ($)	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Earnings Less than Distributions [Member]	Accumulated Other Comprehensive Income (Loss) [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, 2020	$ 4,515,734,000	$ 2,188,000	$ 4,120,173,000	$ (456,393,000)	$ (12,791,000)	$ 437,161,000	$ 79,017,000	$ 346,379,000
Common stock, shares outstanding at Dec. 31, 2020		218,817,000
Net income (loss)	(3,612,000)			(21,576,000)		16,924,000	3,179,000	(2,139,000)
Common shares issued upon redemption of common units			165,000					(165,000)
Common shares issued upon redemption of common units, shares		10,000
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(214,000)	$ 1,000		(215,000)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		129,000
Dividends and distributions	(50,683,000)			(45,981,000)				(4,702,000)
Contributions from noncontrolling interests	121,000					121,000
Distributions to noncontrolling interests	(19,616,000)					(19,616,000)
Change in value of interest rate swaps and interest rate caps	995,000				905,000			90,000
Pro rata share of other comprehensive income of unconsolidated joint ventures	5,677,000				5,156,000		13,000	508,000
Amortization of equity awards	14,544,000		916,000					13,628,000
Reallocation of noncontrolling interest			(3,586,000)					3,586,000
Other	271,000		271,000	(552,000)		552,000
Ending balance at Sep. 30, 2021	4,463,217,000	$ 2,189,000	4,117,939,000	(524,717,000)	(6,730,000)	435,142,000	82,209,000	357,185,000
Common stock, shares outstanding at Sep. 30, 2021		218,956,000
Beginning balance at Jun. 30, 2021	4,480,123,000	$ 2,189,000	4,113,889,000	(507,321,000)	(8,478,000)	442,428,000	79,085,000	358,331,000
Common stock, shares outstanding at Jun. 30, 2021		218,962,000
Net income (loss)	4,632,000			(2,055,000)		3,768,000	3,123,000	(204,000)
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(14,000)			(14,000)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		(6,000)
Dividends and distributions	(16,897,000)			(15,327,000)				(1,570,000)
Distributions to noncontrolling interests	(11,054,000)					(11,054,000)
Change in value of interest rate swaps and interest rate caps	995,000				905,000			90,000
Pro rata share of other comprehensive income of unconsolidated joint ventures	928,000				843,000		1,000	84,000
Amortization of equity awards	4,233,000		305,000					3,928,000
Reallocation of noncontrolling interest			3,474,000					(3,474,000)
Other	271,000		271,000
Ending balance at Sep. 30, 2021	4,463,217,000	$ 2,189,000	4,117,939,000	(524,717,000)	(6,730,000)	435,142,000	82,209,000	357,185,000
Common stock, shares outstanding at Sep. 30, 2021		218,956,000
Beginning balance at Dec. 31, 2021	$ 4,455,032,000	$ 2,190,000	4,122,680,000	(538,845,000)	2,138,000	428,833,000	81,925,000	356,111,000
Common stock, shares outstanding at Dec. 31, 2021	218,991,795	218,992,000
Net income (loss)	$ 11,384,000			1,474,000		12,383,000	(2,677,000)	204,000
Common shares issued upon redemption of common units		$ 66,000	108,418,000					(108,484,000)
Common shares issued upon redemption of common units, shares		6,607,000
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(284,000)			(284,000)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		99,000
Repurchases of common shares	(21,313,000)	$ (32,000)	(21,281,000)
Repurchases of common shares, shares		(3,237,000)
Dividends and distributions	(56,128,000)			(51,733,000)				(4,395,000)
Distributions to noncontrolling interests	(33,814,000)					(33,814,000)
Change in value of interest rate swaps and interest rate caps	34,450,000				31,635,000			2,815,000
Pro rata share of other comprehensive income of unconsolidated joint ventures	19,109,000				17,547,000			1,562,000
Amortization of equity awards	14,992,000		970,000					14,022,000
Reallocation of noncontrolling interest			(345,000)					345,000
Other	(235,000)			(235,000)
Ending balance at Sep. 30, 2022	$ 4,423,193,000	$ 2,224,000	4,210,442,000	(589,623,000)	51,320,000	407,402,000	79,248,000	262,180,000
Common stock, shares outstanding at Sep. 30, 2022	222,461,093	222,461,000
Beginning balance at Jun. 30, 2022	$ 4,451,354,000	$ 2,255,000	4,228,674,000	(570,577,000)	36,840,000	412,189,000	80,557,000	261,416,000
Common stock, shares outstanding at Jun. 30, 2022		225,625,000
Net income (loss)	1,224,000			(1,537,000)		4,179,000	(1,309,000)	(109,000)
Common shares issued upon redemption of common units		$ 1,000	1,271,000					(1,272,000)
Common shares issued upon redemption of common units, shares		77,000
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(4,000)			(4,000)
Common shares issued under Omnibus share plan, net of shares withheld for taxes		(4,000)
Repurchases of common shares	(21,313,000)	$ (32,000)	(21,281,000)
Repurchases of common shares, shares		(3,237,392)
Dividends and distributions	(18,564,000)			(17,270,000)				(1,294,000)
Distributions to noncontrolling interests	(8,966,000)					(8,966,000)
Change in value of interest rate swaps and interest rate caps	9,796,000				9,150,000			646,000
Pro rata share of other comprehensive income of unconsolidated joint ventures	5,707,000				5,330,000			377,000
Amortization of equity awards	4,194,000		331,000					3,863,000
Reallocation of noncontrolling interest			1,447,000					(1,447,000)
Other	(235,000)			(235,000)
Ending balance at Sep. 30, 2022	$ 4,423,193,000	$ 2,224,000	$ 4,210,442,000	$ (589,623,000)	$ 51,320,000	$ 407,402,000	$ 79,248,000	$ 262,180,000
Common stock, shares outstanding at Sep. 30, 2022	222,461,093	222,461,000