CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Series D Preferred Shares	Common Shares	Additional Paid in Capital	Cumulative Net Income	Cumulative Common Distributions	Cumulative Preferred Distributions	Noncontrolling Interest
Balance as of beginning of period (in shares) at Dec. 31, 2019		4,915,196	121,924,199
Balance as of beginning of period at Dec. 31, 2019	$ 3,245,872	$ 119,263	$ 1,219	$ 4,313,831	$ 3,363,654	$ (3,851,666)	$ (701,724)	$ 1,295
Increase (Decrease) in Stockholders' Equity
Net (loss) income	453,393				452,591			802
Repurchase of shares (in shares)			(711,000)
Repurchase of shares	(20,869)		$ (7)	(20,862)
Surrender of shares for tax withholding (in shares)			(183,466)
Surrender of shares for tax withholding	(6,012)		$ (2)	(6,010)
Share-based compensation (in shares)			491,891
Share-based compensation	6,571		$ 5	5,859				707
Contributions	1							1
Distributions	(5,184)					(1,190)	(3,994)
Redemption of noncontrolling interest	(31)							(31)
Adjustment for noncontrolling interest				(4,573)				4,573
Balance as of end of period (in shares) at Jun. 30, 2020		4,915,196	121,521,624
Balance as of end of period at Jun. 30, 2020	3,673,741	$ 119,263	$ 1,215	4,288,245	3,816,245	(3,852,856)	(705,718)	7,347
Balance as of beginning of period (in shares) at Mar. 31, 2020		4,915,196	121,502,520
Balance as of beginning of period at Mar. 31, 2020	3,644,614	$ 119,263	$ 1,215	4,285,266	3,788,413	(3,852,856)	(703,721)	7,034
Increase (Decrease) in Stockholders' Equity
Net (loss) income	27,886				27,832			54
Share-based compensation (in shares)			19,104
Share-based compensation	3,268			2,906				362
Contributions	1							1
Distributions	(1,997)					0	(1,997)	0
Redemption of noncontrolling interest	(31)							(31)
Adjustment for noncontrolling interest				73				(73)
Balance as of end of period (in shares) at Jun. 30, 2020		4,915,196	121,521,624
Balance as of end of period at Jun. 30, 2020	3,673,741	$ 119,263	$ 1,215	4,288,245	3,816,245	(3,852,856)	(705,718)	7,347
Balance as of beginning of period (in shares) at Dec. 31, 2020		4,915,196	121,522,555
Balance as of beginning of period at Dec. 31, 2020	3,243,164	$ 119,263	$ 1,215	4,294,632	3,814,948	(4,283,668)	(709,712)	6,486
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(11,978)				(11,954)			(24)
Surrender of shares for tax withholding (in shares)			(244,029)
Surrender of shares for tax withholding	(7,041)		$ (2)	(7,039)
Share-based compensation (in shares)			661,829
Share-based compensation	9,601		$ 6	9,088				507
Distributions	(1,910)					1,998	(3,994)	86
Adjustment for noncontrolling interest				516				(516)
Balance as of end of period (in shares) at Jun. 30, 2021		4,915,196	121,940,355
Balance as of end of period at Jun. 30, 2021	3,231,836	$ 119,263	$ 1,219	4,297,197	3,802,994	(4,281,670)	(713,706)	6,539
Balance as of beginning of period (in shares) at Mar. 31, 2021		4,915,196	121,916,875
Balance as of beginning of period at Mar. 31, 2021	3,231,618	$ 119,263	$ 1,219	4,295,226	3,804,930	(4,283,753)	(711,709)	6,442
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(1,940)				(1,936)			(4)
Surrender of shares for tax withholding (in shares)			(33,695)
Surrender of shares for tax withholding	(948)			(948)
Share-based compensation (in shares)			57,175
Share-based compensation	2,914			2,683				231
Distributions	192					2,083	(1,997)	106
Adjustment for noncontrolling interest				236				(236)
Balance as of end of period (in shares) at Jun. 30, 2021		4,915,196	121,940,355
Balance as of end of period at Jun. 30, 2021	$ 3,231,836	$ 119,263	$ 1,219	$ 4,297,197	$ 3,802,994	$ (4,281,670)	$ (713,706)	$ 6,539