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
Beginning balance (in shares) at Dec. 31, 2015		97,589,598
Beginning balance at Dec. 31, 2015	$ 1,297,347	$ 98	$ 1,820,451	$ (2,519)	$ (521,620)	$ 937
Increase (Decrease) in Stockholders' Equity
Distributions to noncontrolling interests	(36)					(36)
Stock-based compensation expense (in shares)		10,176
Stock-based compensation expense	65		65
Issuance of shares pursuant to employment agreements (in shares)		76,423
Share repurchase (in shares)		(10,000,000)
Share repurchase	(210,332)	$ (10)	(186,781)		(23,541)
Common dividends	(40,544)				(40,544)
Other comprehensive income (loss)	(10,370)			(10,370)
Net income	27,841				27,829	12
Ending balance (in shares) at Jun. 30, 2016		87,676,197
Ending balance at Jun. 30, 2016	1,063,971	$ 88	1,633,735	(12,889)	(557,876)	913
Increase (Decrease) in Stockholders' Equity
Net income	858
Ending balance (in shares) at Jun. 30, 2016		87,676,197
Ending balance at Jun. 30, 2016	1,063,971	$ 88	1,633,735	(12,889)	(557,876)	913
Beginning balance (in shares) at Dec. 31, 2016		84,048,081
Beginning balance at Dec. 31, 2016	966,589	$ 84	1,566,073	(509)	(599,971)	912
Increase (Decrease) in Stockholders' Equity
Distributions to noncontrolling interests	(37)					(37)
Stock-based compensation expense (in shares)		9,585
Stock-based compensation expense	78		78
Share repurchase (in shares)		(26,181,818)
Share repurchase	(576,000)	$ (26)	(489,027)		(86,947)
Special cash dividends paid to certain common stockholders	(4,872)				(4,872)
Common dividends	(25,620)				(25,620)
Issuance of Warrants	27		27
Dividends to holders of Series A Preferred Stock	(103)				(103)
Other comprehensive income (loss)	1,112			1,112
Net income	285,307				285,293	14
Ending balance (in shares) at Jun. 30, 2017		57,875,848
Ending balance at Jun. 30, 2017	646,481	$ 58	1,077,151	603	(432,220)	889
Increase (Decrease) in Stockholders' Equity
Net income	91,372
Ending balance (in shares) at Jun. 30, 2017		57,875,848
Ending balance at Jun. 30, 2017	$ 646,481	$ 58	$ 1,077,151	$ 603	$ (432,220)	$ 889