Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net (loss) income	$ (91,107)	$ (117,500)	$ (162,519)	$ 33,545	$ 45,918	$ 17,916	$ (371,126)	$ 97,379
Loss (income) from consolidated joint venture attributable to noncontrolling interest	1,816			(2,508)			4,436	(6,062)
Preferred stock dividends	(3,208)			(3,208)			(9,622)	(9,622)
Distributions paid on unvested restricted stock compensation				(61)			(69)	(183)
Undistributed income allocated to unvested restricted stock compensation				(89)				(257)
Numerator for basic and diluted (loss) income attributable to common stockholders	$ (92,499)			$ 27,679			$ (376,381)	$ 81,255
Denominator:
Weighted average basic and diluted common shares outstanding (in shares)	214,257			224,530			216,498	226,369
Basic and diluted (loss) income attributable to common stockholders per common share (in dollars per share)	$ (0.43)			$ 0.12			$ (1.74)	$ 0.36