Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Distributions In Excess of Earnings	Noncontrolling Interests	Series L Preferred Stock	Series L Preferred Stock Preferred Stock	Series L Preferred Stock Additional Paid-in Capital	Series L Preferred Stock Distributions In Excess of Earnings	Series A Preferred Stock	Series A Preferred Stock Preferred Stock	Series A Preferred Stock Distributions In Excess of Earnings
Balance (in shares) at Dec. 31, 2015		97,589,598						0				0
Balance, at beginning of period at Dec. 31, 2015	$ 1,297,347	$ 98	$ 1,820,451	$ (2,519)	$ (521,620)	$ 937		$ 0				$ 0
Increase (Decrease) in Stockholders' Equity
Distributions to noncontrolling interests	(43)					(43)
Stock based compensation expense (in shares)		10,176
Stock-based compensation expense	164		164
Issuance of shares pursuant to employment agreements (in shares)		76,423
Share repurchases (in shares)		(13,628,116)
Share repurchases	(290,134)	$ (14)	(254,547)		(35,573)
Common dividends	(77,316)				(77,316)
Issuance of Series A Preferred Warrants	5		5
Dividends to holders of Series A Preferred Stock ($1.375 per share)	(9)				(9)
Reclassification of Series A Preferred Stock to permanent equity	0
Other comprehensive income (loss)	2,010			2,010
Net income	34,565				34,547	18
Balance (in shares) at Dec. 31, 2016		84,048,081						0				0
Balance, at end of period at Dec. 31, 2016	966,589	$ 84	1,566,073	(509)	(599,971)	912		$ 0				$ 0
Increase (Decrease) in Stockholders' Equity
Distributions to noncontrolling interests	(43)					(43)
Stock based compensation expense (in shares)		9,585
Stock-based compensation expense	154		154
Share repurchases (in shares)		(40,272,727)
Share repurchases	(886,010)	$ (40)	(752,218)		(133,752)
Special cash dividends declared to certain common stockholders ($2.990 per share)	(6,447)				(6,447)
Common dividends	(38,327)				(38,327)
Issuance of Series A Preferred Warrants	126		126
Issuance of Series L Preferred Stock (in shares)								8,080,740
Issuance of Series L Preferred Stock							$ 207,845	$ 229,251	$ (21,406)
Dividends to holders of Series A Preferred Stock ($1.375 per share)	(490)				(490)
Reclassification of Series A to permanent equity (in shares)												61,013
Reclassification of Series A Preferred Stock to permanent equity	1,417		(101)									$ 1,518
Redemption of Series A Preferred Stock (in shares)												(421)
Redemption of Series A Preferred Stock	(7)		3									$ (10)
Other comprehensive income (loss)	2,140			2,140
Net income	379,758				379,737	21
Balance (in shares) at Dec. 31, 2017		43,784,939						8,080,740				60,592
Balance, at end of period at Dec. 31, 2017	626,705	$ 44	792,631	1,631	(399,250)	890		$ 229,251				$ 1,508
Increase (Decrease) in Stockholders' Equity
Distributions to noncontrolling interests	(74)					(74)
Stock based compensation expense (in shares)		10,134
Stock-based compensation expense	162		162
Common dividends	(21,895)				(21,895)
Issuance of Series A Preferred Warrants	73		73
Dividends to holders of Series A Preferred Stock ($1.375 per share)							$ (14,045)			$ (14,045)	$ (2,814)		$ (2,814)
Reclassification of Series A to permanent equity (in shares)												1,223,032
Reclassification of Series A Preferred Stock to permanent equity	27,887		(2,516)									$ 30,403
Redemption of Series A Preferred Stock (in shares)												(1,820)
Redemption of Series A Preferred Stock	(41)		4									$ (45)
Other comprehensive income (loss)	175			175
Net income	1,142				1,121	21
Balance (in shares) at Dec. 31, 2018		43,795,073						8,080,740				1,281,804
Balance, at end of period at Dec. 31, 2018	$ 617,275	$ 44	$ 790,354	$ 1,806	$ (436,883)	$ 837		$ 229,251				$ 31,866