Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Total Shareholders’ Equity	Common Shares	Additional Paid - In Capital	Retained earnings (distributions in excess of retained earnings)	Noncontrolling Interest in Operating Partnership
Beginning Balance (in shares) at Dec. 31, 2018			46,525,652
Beginning 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)			17,483
Issuance of shares, net of offering costs	93	93	$ 1	92
Amortization of share based compensation	947	16		16		931
Dividends declared on common shares	(15,367)	(15,367)			(15,367)
Distributions declared on LTIP units	(302)					(302)
Reallocation of noncontrolling interest	0	267		267		267
Net income	1,628	1,613			1,613	15
Ending Balance (in shares) at Mar. 31, 2019			46,571,005
Ending Balance at Mar. 31, 2019	794,917	784,588	$ 466	897,161	(113,039)	10,329
Beginning Balance (in shares) at Dec. 31, 2019			46,928,445
Beginning Balance at Dec. 31, 2019	775,024	762,377	$ 469	904,273	(142,365)	12,647
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to Equity Incentive Plan (in shares)			24,516
Issuance of shares pursuant to Equity Incentive Plan	450	450		450
Issuance of shares, net of offering costs (in shares)			7,428
Issuance of shares, net of offering costs	91	91		91
Amortization of share based compensation	1,380	8		8		1,372
Dividends declared on common shares	(10,331)	(10,331)			(10,331)
Distributions declared on LTIP units	(233)					(233)
Reallocation of noncontrolling interest	0	1,114		1,114		(1,114)
Net income	(28,111)	(27,783)			(27,783)	(328)
Ending Balance (in shares) at Mar. 31, 2020			46,960,389
Ending Balance at Mar. 31, 2020	$ 738,270	$ 725,926	$ 469	$ 905,936	$ (180,479)	$ 12,344