Net Income (Loss) Per Share/Unit - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income (loss) attributable to the General Partner	$ 33,408	$ 3,146	$ 47,846	$ (109,940)
Dividends to preferred shares and units	(17,973)	(17,973)	(35,946)	(35,946)
Net income (loss) available to the General Partner	15,435	(14,827)	11,900	(145,886)
Earnings allocated to participating securities	(212)	(210)	(391)	(335)
Income attributable to limited partners	792	0	1,151	0
Net income (loss) attributable to common stockholders/unitholders and limited partners used in basic and diluted net income (loss) per share/unit	$ 16,015	$ (15,037)	$ 12,660	$ (146,221)
Weighted average number of common stock outstanding - basic (shares)	974,160,295	904,107,378	974,005,811	903,966,552
Effect of Limited Partner OP Units and dilutive securities (shares)	23,933,215	0	24,019,403	0
Weighted average number of common units outstanding - diluted	998,093,510	904,107,378	998,025,214	903,966,552
Basic and diluted net income (loss) per share attributable to common stockholders (in dollars per share)	$ 0.02	$ (0.02)	$ 0.01	$ (0.16)