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 Income (loss) [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] Series D Preferred Stock [Member]	Accumulated Deficit [Member] Preferred Stock [Member]	Non-Controlling Interests [Member]
Beginning balance (shares) at Dec. 31, 2014							42,834,138	905,530,431
Beginning balance at Dec. 31, 2014	$ 9,382,330			$ 9,153,888			$ 428	$ 9,055	$ 11,920,253	$ 2,728	$ (2,778,576)			$ 228,442
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common stock to settle tax obligation (shares)								(183,492)
Repurchases of common stock to settle tax obligation	(1,634)			(1,634)				$ (1)	(1,633)
Equity-based compensation, net (shares)								(386,705)
Equity-based compensation, net	10,189			10,189				$ (4)	10,193
Distributions declared on common stock	(124,225)			(124,225)							(124,225)
Tax shortfall from equity-based compensation	(629)			(629)					(629)
Distributions to non-controlling interest holders	(16,879)													(16,879)
Distributions		$ (222)	$ (53,920)		$ (222)	$ (53,920)						$ (222)	$ (53,920)
Disposition of joint venture	6,339													6,339
Net loss	(131,261)			(128,963)							(128,963)			(2,298)
Other comprehensive loss	(12,863)			(12,534)						(12,534)				(329)
Ending balance (shares) at Sep. 30, 2015							42,834,138	904,960,234
Ending balance at Sep. 30, 2015	9,057,225			8,841,950			$ 428	$ 9,050	11,928,184	(9,806)	(3,085,906)			215,275
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment for equity-based compensation forfeitures	0								384		(384)
Beginning balance (shares) at Dec. 31, 2015							42,834,138	904,884,394
Beginning balance at Dec. 31, 2015	8,713,959			8,523,987			$ 428	$ 9,049	11,931,768	(2,025)	(3,415,233)			189,972
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (shares)								69,000,000
Issuance of common stock, net	702,482			702,482				$ 690	701,792
Conversion of OP Units to common stock (shares)								15,450
Conversion of OP Units to common stock	0			159					159					(159)
Repurchases of common stock to settle tax obligation (shares)								(424,726)
Repurchases of common stock to settle tax obligation	(4,148)			(4,148)				$ (4)	(4,144)
Equity-based compensation, net (shares)								708,701
Equity-based compensation, net	7,097			7,097				$ 7	7,090
Contributions from non-controlling interest holders	675													675
Distributions declared on common stock	(382,819)			(382,819)							(382,819)
Distributions to non-controlling interest holders	(9,889)													(9,889)
Distributions		$ (400)	$ (53,919)		$ (400)	$ (53,811)						$ (400)	$ (53,811)	(108)
Net loss	(82,601)			(80,445)							(80,445)			(2,156)
Other comprehensive loss	(2,742)			(2,662)						(2,662)				(80)
Ending balance (shares) at Sep. 30, 2016							42,834,138	974,183,819
Ending balance at Sep. 30, 2016	$ 8,887,695			$ 8,709,440			$ 428	$ 9,742	$ 12,637,049	$ (4,687)	$ (3,933,092)			$ 178,255