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]
Common stock repurchases (shares)								(142,587)
Common stock repurchases	(1,339)			(1,339)				$ (1)	(1,338)
Equity-based compensation, net (shares)								(325,171)
Equity-based compensation, net	6,173			6,173				$ (3)	6,176
Tax shortfall from equity-based compensation	(544)			(544)					(544)
Distributions to non-controlling interest holders	(5,814)													(5,814)
Distributions		$ (5)	$ (35,946)		$ (5)	$ (35,946)						$ (5)	$ (35,946)
Disposition of consolidated joint venture interest	3,041													3,041
Net loss	(139,402)			(136,492)							(136,492)			(2,910)
Other comprehensive loss	(4,656)			(4,656)						(4,656)
Ending balance (shares) at Jun. 30, 2015							42,834,138	905,062,673
Ending balance at Jun. 30, 2015	9,203,838			8,981,079			$ 428	$ 9,051	11,924,547	(1,928)	(2,951,019)			222,759
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]
Common stock repurchases (shares)								(205,325)
Common stock repurchases	(1,798)			(1,798)				$ (2)	(1,796)
Equity-based compensation, net (shares)								118,891
Equity-based compensation, net	4,509			4,509				$ 1	4,508
Contributions from non-controlling interest holders	675													675
Distributions declared	(248,575)			(248,575)							(248,575)
Distributions to non-controlling interest holders	(6,596)													(6,596)
Distributions		$ (335)	$ (35,946)		$ (335)	$ (35,874)						$ (335)	$ (35,874)	(72)
Net loss	(112,847)			(109,940)							(109,940)			(2,907)
Other comprehensive loss	(10,541)			(10,272)						(10,272)				(269)
Ending balance (shares) at Jun. 30, 2016							42,834,138	904,797,960
Ending balance at Jun. 30, 2016	8,302,505			$ 8,121,702			$ 428	$ 9,048	11,934,864	$ (12,297)	(3,810,341)			$ 180,803
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment for equity-based compensation forfeitures	$ 0								$ 384		$ (384)