Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings (Deficit) and Distributions	Total Stockholders’ Equity	Non-controlling Interests in Operating Partnership
Balance at beginning of year at Dec. 31, 2015	$ 856,926	$ 84	$ 868	$ 894,060	$ (1,666)	$ (40,635)	$ 852,711	$ 4,215
Balance (in shares) at Dec. 31, 2015		8,400,000	86,793,521
Changes in equity
Common stock redemption of common units			$ 0	254			254	(254)
Common stock redemption of common units (in shares)	31,042		31,042
Dividends	$ (14,402)					(14,345)	(14,345)	(57)
Equity-based compensation	793		$ 4	785			789	4
Equity-based compensation (in shares)			448,342
Other	$ (617)			(617)			(617)
Other (in shares)	(53,059)		(53,059)
Other comprehensive income	$ (632)				(628)		(628)	(4)
Net income	48,734					48,485	48,485	249
Balance at end of year at Mar. 31, 2016	890,802	$ 84	$ 872	894,482	(2,294)	(6,495)	886,649	4,153
Balance (in shares) at Mar. 31, 2016		8,400,000	87,219,846
Balance at beginning of year at Dec. 31, 2016	$ 1,013,470	$ 94	$ 935	1,011,412	(977)	(1,422)	1,010,042	3,428
Balance (in shares) at Dec. 31, 2016		9,400,000	93,525,469
Changes in equity
Common stock redemption of common units			$ 0	92			92	(92)
Common stock redemption of common units (in shares)	10,657		10,657
Dividends	$ (19,460)					(19,396)	(19,396)	(64)
Equity-based compensation	1,130		$ 3	1,122			1,125	5
Equity-based compensation (in shares)			317,401
Other	$ (688)		$ 0	(688)			(688)
Other (in shares)	(42,355)		(42,355)
Other comprehensive income	$ 349				348		348	1
Net income	33,206					33,086	33,086	120
Balance at end of year at Mar. 31, 2017	$ 1,028,007	$ 94	$ 938	$ 1,011,938	$ (629)	$ 12,268	$ 1,024,609	$ 3,398
Balance (in shares) at Mar. 31, 2017		9,400,000	93,811,172