Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid - In Capital	Retained earnings (distributions in excess of retained earnings)	Total Shareholders’ Equity	Noncontrolling Interest in Operating Partnership
Beginning Balance (in shares) at Dec. 31, 2018		46,525,652
Beginning Balance at Dec. 31, 2018	$ 807,418	$ 465	$ 896,286	$ (99,285)	$ 797,466	$ 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)		369,414
Issuance of shares, net of offering costs	6,994	$ 4	6,990		6,994
Amortization of share based compensation	3,171		47		47	3,124
Dividends, Common Stock	(46,298)			(46,298)	(46,298)
Distributions declared on LTIP units	(1,001)					(1,001)
Reallocation of noncontrolling interest	0		337		337	(337)
Net loss	21,251			21,052	21,052	199
Ending Balance (in shares) at Sep. 30, 2019		46,922,936
Ending Balance at Sep. 30, 2019	792,035	$ 469	904,160	(124,531)	780,098	11,937
Beginning Balance (in shares) at Jun. 30, 2019		46,918,383
Beginning Balance at Jun. 30, 2019	796,597	$ 469	904,069	(119,049)	785,489	11,108
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares, net of offering costs (in shares)		4,553
Issuance of shares, net of offering costs	75	$ 0	75		75
Amortization of share based compensation	1,099		16		16	1,083
Dividends, Common Stock	(15,484)			(15,484)	(15,484)
Distributions declared on LTIP units	(350)					(350)
Net loss	10,098			10,002	10,002	96
Ending Balance (in shares) at Sep. 30, 2019		46,922,936
Ending Balance at Sep. 30, 2019	792,035	$ 469	904,160	(124,531)	780,098	11,937
Beginning Balance (in shares) at Dec. 31, 2019		46,928,445
Beginning Balance at Dec. 31, 2019	775,024	$ 469	904,273	(142,365)	762,377	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)		18,664
Issuance of shares, net of offering costs	163	$ 1	162		163
Amortization of share based compensation	3,424		22		22	3,402
Dividends, Common Stock	(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 loss	(73,616)			(72,667)	(72,667)	(949)
Ending Balance (in shares) at Sep. 30, 2020		46,971,625
Ending Balance at Sep. 30, 2020	694,881	$ 470	906,021	(225,363)	681,128	13,753
Beginning Balance (in shares) at Jun. 30, 2020		46,965,827
Beginning Balance at Jun. 30, 2020	712,144	$ 470	905,977	(207,306)	699,141	13,003
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares, net of offering costs (in shares)		5,798
Issuance of shares, net of offering costs	37	$ 0	37		37
Amortization of share based compensation	1,012		7		7	1,005
Net loss	(18,312)			(18,057)	(18,057)	(255)
Ending Balance (in shares) at Sep. 30, 2020		46,971,625
Ending Balance at Sep. 30, 2020	$ 694,881	$ 470	$ 906,021	$ (225,363)	$ 681,128	$ 13,753