CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Series D Preferred Stock [Member]	Preferred Stock [Member]	Total Stockholders’ Equity	Total Stockholders’ Equity Series D Preferred Stock [Member]	Total Stockholders’ Equity Preferred Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] Series D Preferred Stock [Member]	Accumulated Deficit [Member] Preferred Stock [Member]	Non-Controlling Interests [Member]	Non-Controlling Interests [Member] Preferred Stock [Member]
Beginning balance (shares) at Dec. 31, 2017							42,834,138	974,208,583
Beginning balance at Dec. 31, 2017	$ 8,042,876			$ 7,884,278			$ 428	$ 9,742	$ 12,654,258	$ (3,569)	$ (4,776,581)			$ 158,598
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock under Share Repurchase Program (shares)								(6,399,666)
Repurchases of Common Stock under Share Repurchase Programs	(44,585)			(44,585)				$ (64)	(44,521)
Repurchases of Common Stock to settle tax obligation (shares)								(230,436)
Repurchases of Common Stock to settle tax obligation	(1,660)			(1,660)				$ (2)	(1,658)
Equity-based compensation, net (shares)								576,005
Equity-based compensation, net	2,932			2,932				$ 5	2,927
Distributions declared on Common Stock — $0.1375 per common share	(133,104)			(133,104)							(133,104)
Distributions to non-controlling interest holders	(3,264)													(3,264)
Distributions		$ (522)	$ (17,973)		$ (522)	$ (17,937)						$ (522)	$ (17,937)		$ (36)
Net income	32,537			31,795							31,795			742
Other comprehensive (loss) income	(732)			(715)						(715)				(17)
Ending balance (shares) at Mar. 31, 2018							42,834,138	968,154,486
Ending balance at Mar. 31, 2018	7,876,505			7,720,482			$ 428	$ 9,681	12,611,006	(4,284)	(4,896,349)			156,023
Beginning balance (shares) at Dec. 31, 2018							42,834,138	967,515,165
Beginning balance at Dec. 31, 2018	7,300,144			7,157,059			$ 428	$ 9,675	12,615,472	(1,280)	(5,467,236)			143,085
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, net (shares)								3,309,808
Issuance of Common Stock, net	27,544			27,544				$ 33	27,511
Conversion of OP Units to Common Stock				(26)					(26)					26
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				923			$ 1		922					(923)
Repurchases of Common Stock to settle tax obligation (shares)								(199,083)
Repurchases of Common Stock to settle tax obligation	(1,595)			(1,595)				$ (2)	(1,593)
Equity-based compensation, net (shares)								950,487
Equity-based compensation, net	2,872			2,872				$ 10	2,862
Contributions from non-controlling interest holders	64													64
Distributions declared on Common Stock — $0.1375 per common share	(133,480)			(133,480)							(133,480)
Distributions to non-controlling interest holders	(3,262)													(3,262)
Dividend equivalents on awards granted under the Equity Plan	(1,222)			(1,222)							(1,222)
Distributions	(17,973)			(17,940)							(17,940)			(33)
Net income	70,971			69,304							69,304			1,667
Other comprehensive (loss) income	(11,189)			(10,922)						(10,922)				(267)
Ending balance (shares) at Mar. 31, 2019							42,871,246	971,576,377
Ending balance at Mar. 31, 2019	$ 7,232,874			$ 7,092,517			$ 429	$ 9,716	$ 12,645,148	$ (12,202)	$ (5,550,574)			$ 140,357