Consolidated Statements of Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Distributions In Excess of Earnings	Treasury Stock	Noncontrolling Interests	Total
Balance at Dec. 31, 2014	$ 98	$ 1,824,381		$ (460,623)	$ (4,901)	$ 861	$ 1,359,816
Balance (in shares) at Dec. 31, 2014	97,581,598
Increase (Decrease) in Stockholders' Equity
Contributions from noncontrolling interests						110	110
Distributions to noncontrolling interests						(38)	(38)
Stock-based compensation expense		717					717
Stock-based compensation expense (in shares)	8,000
Common dividends				(42,693)			(42,693)
Net income				7,708		6	7,714
Balance at Jun. 30, 2015	$ 98	1,825,098		(495,608)	$ (4,901)	939	1,325,626
Balance (in shares) at Jun. 30, 2015	97,589,598
Balance at Dec. 31, 2015	$ 98	1,820,451	$ (2,519)	(521,620)		937	1,297,347
Balance (in shares) at Dec. 31, 2015	97,589,598
Increase (Decrease) in Stockholders' Equity
Distributions to noncontrolling interests						(36)	(36)
Stock-based compensation expense		65					65
Stock-based compensation expense (in shares)	10,176
Issuance of shares pursuant to employment agreement (in shares)	76,423
Repurchase of common stock	$ (10)	(186,781)		(23,541)			(210,332)
Repurchase of common stock (in shares)	(10,000,000)
Common dividends				(40,544)			(40,544)
Other comprehensive income (loss)			(10,370)				(10,370)
Net income				27,829		12	27,841
Balance at Jun. 30, 2016	$ 88	$ 1,633,735	$ (12,889)	$ (557,876)		$ 913	$ 1,063,971
Balance (in shares) at Jun. 30, 2016	87,676,197