Net Income (Loss) Per Share/Unit - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income (loss) attributable to the General Partner	$ 16,094	$ 29,495	$ 63,940	$ (80,445)
Dividends to preferred shares and units	(17,973)	(17,973)	(53,919)	(53,919)
Net (loss) income available to the General Partner	(1,879)	11,522	10,021	(134,364)
Earnings allocated to participating securities	(43)	(154)	(434)	(400)
Income attributable to limited partners	0	739	1,542	0
Net (loss) income attributable to common stockholders/unitholders and limited partners used in basic and diluted net income (loss) per share/unit	$ (1,922)	$ 12,107	$ 11,129	$ (134,764)
Weighted average number of common stock outstanding - basic (shares)	974,167,088	943,480,170	974,060,160	917,233,898
Effect of Limited Partner OP Units and dilutive securities (shares)	0	25,206,373	24,025,813	0
Weighted average number of common units outstanding - diluted (shares)	974,167,088	968,686,543	998,085,973	917,233,898
Basic and diluted net (loss) income per share attributable to common stockholders (in dollars per share)	$ 0.00	$ 0.01	$ 0.01	$ (0.15)