Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Total Shareholders’ Equity	Common Shares	Additional Paid - In Capital	Accumulated Deficit	Noncontrolling Interest in Operating Partnership
Beginning Balance (in shares) at Dec. 31, 2013			26,295,558
Beginning Balance at Dec. 31, 2013	$ 385,536	$ 383,369	$ 261	$ 433,900	$ (50,792)	$ 2,167
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to Equity Incentive Plan (in shares)			16,542
Issuance of shares pursuant to Equity Incentive Plan	337	337		337
Issuance of shares, net of offering costs (in shares)			7,782,903
Issuance of shares, net of offering costs	164,399	164,399	$ 78	164,321
Issuance of restricted time-based shares (in shares)			48,213
Issuance of restricted time-based shares	0
Issuance of performance based shares (in shares)			31,342
Issuance of performance based shares	0
Repurchase of common shares (in shares)			(867)
Repurchase of common shares	(18)	(18)		(18)
Amortization of share based compensation	2,058	1,275		1,275		783
Dividends declared on common shares	(27,201)	(27,201)			(27,201)
Distributions declared on LTIP units	(240)					(240)
Reallocation of noncontrolling interest	0	(497)		(497)		497
Net income	67,081	66,873			66,873	208
Ending Balance (in shares) at Dec. 31, 2014			34,173,691
Ending Balance at Dec. 31, 2014	591,952	588,537	$ 339	599,318	(11,120)	3,415
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to Equity Incentive Plan (in shares)			14,113
Issuance of shares pursuant to Equity Incentive Plan	412	412		412
Issuance of shares, net of offering costs (in shares)			4,028,512
Issuance of shares, net of offering costs	118,797	118,797	$ 40	118,757
Issuance of restricted time-based shares (in shares)			49,110
Issuance of restricted time-based shares	0
Issuance of performance based shares (in shares)			44,274
Issuance of performance based shares	0
Repurchase of common shares (in shares)			(763)
Repurchase of common shares	(22)	(22)		(22)
Amortization of share based compensation	2,285	1,594		1,594		691
Dividends declared on common shares	(49,127)	(49,127)			(49,127)
Distributions declared on LTIP units	(473)					(473)
Reallocation of noncontrolling interest	0	(286)		(286)		286
Net income	33,178	32,966			32,966	212
Ending Balance (in shares) at Dec. 31, 2015			38,308,937
Ending Balance at Dec. 31, 2015	697,002	692,871	$ 379	719,773	(27,281)	4,131
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to Equity Incentive Plan (in shares)			26,488
Issuance of shares pursuant to Equity Incentive Plan	550	550		550
Issuance of shares, net of offering costs (in shares)			23,738
Issuance of shares, net of offering costs	408	408	$ 1	407
Issuance of restricted time-based shares (in shares)			7,851
Issuance of restricted time-based shares	0
Amortization of share based compensation	2,513	1,278		1,278		1,235
Dividends declared on common shares	(49,859)	(49,859)			(49,859)
Distributions declared on LTIP units	(719)					(719)
Reallocation of noncontrolling interest	0	11		11		(11)
Net income	31,695	31,483			31,483	212
Ending Balance (in shares) at Dec. 31, 2016			38,367,014
Ending Balance at Dec. 31, 2016	$ 681,590	$ 676,742	$ 380	$ 722,019	$ (45,657)	$ 4,848