CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Deficit [Member]	Parent [Member]	Non-Controlling Interests [Member]
Beginning balance (shares) at Dec. 31, 2017		42,834,138	194,841,717
Beginning balance at Dec. 31, 2017	$ 8,042,876	$ 428	$ 1,948	$ 12,662,052	$ (3,569)	$ (4,776,581)	$ 7,884,278	$ 158,598
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of OP Units to Common Stock (in shares)			6,488
Conversion of OP Units to Common Stock	0			241			241	(241)
Repurchases of Common Stock under Share Repurchase Programs (in shares)			(1,441,375)
Repurchases of Common Stock under Share Repurchase Programs	(50,154)		$ (14)	(50,140)			(50,154)
Repurchases of Common Stock to settle tax obligation (shares)			(64,901)
Repurchases of Common Stock to settle tax obligation	(2,326)		$ (1)	(2,325)			(2,326)
Equity-based compensation, net (shares)			161,104
Equity-based compensation, net	13,314		$ 2	13,312			13,314
Contributions from non-controlling interest holders	120							120
Distributions declared on common stock	(532,144)					(532,144)	(532,144)
Distributions to non-controlling interest holders	(13,048)							(13,048)
Dividend equivalents on awards granted under the Equity Plan	(917)			72		(989)	(917)
Distributions to preferred shareholders and unitholders	(71,892)					(71,748)	(71,748)	(144)
Distributions payable relinquished	0
Net income (loss)	(88,030)					(85,774)	(85,774)	(2,256)
Other comprehensive income (loss)	2,345				2,289		2,289	56
Ending balance (shares) at Dec. 31, 2018		42,834,138	193,503,033
Ending balance at Dec. 31, 2018	7,300,144	$ 428	$ 1,935	12,623,212	(1,280)	(5,467,236)	7,157,059	143,085
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, net (shares)			21,682,014
Issuance of Common Stock, net	1,014,215		$ 216	1,013,999			1,014,215
Conversion of OP Units to Common Stock (in shares)			26,058
Conversion of OP Units to Common Stock	0			1,167			1,167	(1,167)
Conversion of Series F Preferred Units to Series F Preferred Stock (shares)		37,108
Conversion of Series F Preferred Units to Series F Preferred Stock	0	$ 1		922			923	(923)
Redemption of Series F Preferred Stock (in shares)		(12,000,000)
Redemption of Series F Preferred Stock	(300,122)	$ (120)		(300,002)			(300,122)
Repurchases of Common Stock to settle tax obligation (shares)			(40,066)
Repurchases of Common Stock to settle tax obligation	(1,618)			(1,618)			(1,618)
Equity-based compensation, net (shares)			198,158
Equity-based compensation, net	13,101		$ 2	13,099			13,101
Contributions from non-controlling interest holders	64							64
Distributions declared on common stock	(562,195)					(562,195)	(562,195)
Distributions to non-controlling interest holders	(9,494)							(9,494)
Dividend equivalents on awards granted under the Equity Plan	(1,328)			117		(1,445)	(1,328)
Distributions to preferred shareholders and unitholders	(68,488)					(68,397)	(68,397)	(91)
Repurchase of convertible notes	(470)			(470)			(470)
Distributions payable relinquished	12,522							12,522
Surrender of Limited Partner OP Units	(218,510)			(91,920)			(91,920)	(126,590)
Reallocation of equity	0			2,071			2,071	(2,071)
Net income (loss)	(307,106)					(300,353)	(300,353)	(6,753)
Other comprehensive income (loss)	(27,437)				(26,390)		(26,390)	(1,047)
Ending balance (shares) at Dec. 31, 2019		30,871,246	215,369,197
Ending balance at Dec. 31, 2019	6,843,278	$ 309	$ 2,153	13,260,577	(27,670)	(6,399,626)	6,835,743	7,535
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, net (shares)			13,297,721
Issuance of Common Stock, net	478,572		$ 133	478,439			478,572
Fractional common shares settled in reverse stock split (in shares)			(5,270)
Fractional common shares settled in reverse stock split	(205)			(205)			(205)
Conversion of OP Units to Common Stock (in shares)			910
Conversion of OP Units to Common Stock	0			44			44	(44)
Redemption of Limited Partners' Common OP Units	(149)							(149)
Redemption of Series F Preferred Stock (in shares)		(12,000,000)
Redemption of Series F Preferred Stock	(300,152)	$ (120)		(300,032)			(300,152)
Repurchases of Common Stock to settle tax obligation (shares)			(48,468)
Repurchases of Common Stock to settle tax obligation	(2,392)			(2,392)			(2,392)
Equity-based compensation, net (shares)			267,457
Equity-based compensation, net	13,302		$ 3	13,299			13,302
Distributions declared on common stock	(403,336)					(403,336)	(403,336)
Distributions to non-controlling interest holders	(285)							(285)
Dividend equivalents on awards granted under the Equity Plan	(1,686)					(1,686)	(1,686)
Distributions to preferred shareholders and unitholders	(44,590)					(44,508)	(44,508)	(82)
Repurchase of convertible notes	(230)			(230)			(230)
Distributions payable relinquished	0
Reallocation of equity	0			(88)			(88)	88
Net income (loss)	201,219					201,128	201,128	91
Other comprehensive income (loss)	28,222				28,206		28,206	16
Ending balance (shares) at Dec. 31, 2020		18,871,246	228,881,547
Ending balance at Dec. 31, 2020	$ 6,811,568	$ 189	$ 2,289	$ 13,449,412	$ 536	$ (6,648,028)	$ 6,804,398	$ 7,170