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, 2016			38,367,014
Beginning Balance at Dec. 31, 2016	$ 681,590	$ 676,742	$ 380	$ 722,019	$ (45,657)	$ 4,848
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to Equity Incentive Plan (in shares)			23,980
Issuance of shares pursuant to Equity Incentive Plan	500	500		500
Issuance of shares, net of offering costs (in shares)			6,979,272
Issuance of shares, net of offering costs	148,542	148,542	$ 70	148,472
Issuance of restricted time-based shares (in shares)			5,000
Issuance of restricted time-based shares	0
Amortization of share based compensation	3,284	815		815		2,469
Dividends declared on common shares	(52,839)	(52,839)			(52,839)
Distributions declared on LTIP units	(977)					(977)
Reallocation of noncontrolling interest	0	(76)		(76)		76
Net income	29,680	29,478			29,478	202
Ending Balance (in shares) at Dec. 31, 2017			45,375,266
Ending Balance at Dec. 31, 2017	809,780	803,162	$ 450	871,730	(69,018)	6,618
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to Equity Incentive Plan (in shares)			21,670
Issuance of shares pursuant to Equity Incentive Plan	500	500		500
Issuance of shares, net of offering costs (in shares)			1,135,095
Issuance of shares, net of offering costs	23,968	23,968	$ 15	23,953
Issuance of restricted time-based shares (in shares)			5,000
Issuance of restricted time-based shares	0
Amortization of share based compensation	3,710	103		103		3,607
Dividends declared on common shares	(60,908)	(60,908)			(60,908)
Distributions declared on LTIP units	(1,154)					(1,154)
Forfeited distributions on LTIP units	652					652
Net income	30,870	30,641			30,641	229
Ending Balance (in shares) at Dec. 31, 2018			46,537,031
Ending Balance at Dec. 31, 2018	807,418	797,466	$ 465	896,286	(99,285)	9,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to Equity Incentive Plan (in shares)			27,870
Issuance of shares pursuant to Equity Incentive Plan	500	500		500
Issuance of shares, net of offering costs (in shares)			363,544
Issuance of shares, net of offering costs	7,091	7,091	$ 4	7,087
Amortization of share based compensation	4,269	63		63		4,206
Dividends declared on common shares	(61,783)	(61,783)			(61,783)
Distributions declared on LTIP units	(1,351)					(1,351)
Reallocation of noncontrolling interest	0	337		337		(337)
Net income	18,880	18,703			18,703	177
Ending Balance (in shares) at Dec. 31, 2019			46,928,445
Ending Balance at Dec. 31, 2019	$ 775,024	$ 762,377	$ 469	$ 904,273	$ (142,365)	$ 12,647