CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - Unaudited - 3 months ended Mar. 31, 2016 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Distributions In Excess Of Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest in Joint Ventures
BALANCE at Dec. 31, 2015	$ 559,201	$ 3	$ 887,207	$ (328,892)	$ (3,456)	$ 4,339
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,830	0	0	21,711	0	119
Net unrealized change in fair value of interest rate swaps	(5,397)	0	0	0	(5,397)	0
Common dividends declared - $.60 per share	(19,609)	0	0	(19,609)	0	0
Stock-based compensation, net of forfeitures	(3,015)	0	3,015	0	0	0
Issuance of 984 shares of common stock, dividend reinvestment plan	59	0	59	0	0	0
Withheld 47,541 shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock	(2,646)	0	(2,646)	0	0	0
Distributions to noncontrolling interest	(170)	0	0	0	0	(170)
BALANCE at Mar. 31, 2016	$ 556,283	$ 3	$ 887,635	$ (326,790)	$ (8,853)	$ 4,288