CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - Unaudited - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Distributions In Excess Of Earnings	Accumulated Other Comprehensive Income	Noncontrolling Interest in Joint Ventures
BALANCE at Dec. 31, 2016	$ 641,866	$ 3	$ 949,318	$ (313,655)	$ 1,995	$ 4,205
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,973	0	0	12,819	0	154
Net unrealized change in fair value of interest rate swaps	1,410	0	0	0	1,410	0
Common dividends declared - $.62 per share	(20,939)	0	0	(20,939)	0	0
Stock-based compensation, net of forfeitures	2,683	0	2,683	0	0	0
Issuance of 544,144 shares of common stock, common stock offering, net of expenses	39,456	0	39,456	0	0	0
Issuance of 782 shares of common stock, dividend reinvestment plan	57	0	57	0	0	0
Withheld 33,695 shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock	(2,505)	0	(2,505)	0	0	0
Distributions to noncontrolling interest	(120)	0	0	0	0	(120)
Contributions from noncontrolling interest	100	0	0	0	0	100
BALANCE at Mar. 31, 2017	$ 674,981	$ 3	$ 989,009	$ (321,775)	$ 3,405	$ 4,339