CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - Unaudited - 9 months ended Sep. 30, 2018 - 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, 2017	$ 751,130	$ 3	$ 1,061,153	$ (317,032)	$ 5,348	$ 1,658
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	70,053	0	0	69,950	0	103
Net unrealized change in fair value of cash flow hedges	5,345	0	0	0	5,345	0
Common dividends declared - $2.00 per share	(71,328)	0	0	(71,328)	0	0
Stock-based compensation, net of forfeitures	4,503	0	4,503	0	0	0
Issuance of 1,245,885 shares of common stock, common stock offering, net of expenses	112,325	1	112,324	0	0	0
Issuance of 1,232 shares of common stock, dividend reinvestment plan	109	0	109	0	0	0
Withheld 23,824 shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock	(2,055)	0	(2,055)	0	0	0
Distributions to noncontrolling interest	(151)	0	0	0	0	(151)
BALANCE at Sep. 30, 2018	$ 869,931	$ 4	$ 1,176,034	$ (318,410)	$ 10,693	$ 1,610