Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Shares	Common Shares	Additional Paid-in Capital	Accumulated Distributions in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning balance at Dec. 31, 2018	$ 831,543	$ 92,427	$ 797	$ 1,164,848	$ (450,130)	$ 4,020	$ 19,581
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation, net of shares withheld for employee taxes	1,201		1	1,200
Dividends declared to common shareholders	(17,546)				(17,546)
Dividends declared to preferred shareholders	(1,675)				(1,675)
Distributions declared to noncontrolling interests	(421)						(421)
Dividends declared to deferred shares	(132)				(132)
Other comprehensive income adjustment	(1,539)					(1,503)	(36)
Net income	10,693				10,443		250
Ending balance at Mar. 31, 2019	821,791	92,427	798	1,166,048	(459,365)	2,517	19,366
Beginning balance at Dec. 31, 2019	848,255	92,427	798	1,169,557	(436,361)	1,819	20,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares, net of issuance costs	(354)			(354)
Share-based compensation, net of shares withheld for employee taxes	728		2	726
Dividends declared to common shareholders	(17,593)				(17,593)
Dividends declared to preferred shareholders	(1,675)				(1,675)
Distributions declared to noncontrolling interests	(420)						(420)
Dividends declared to deferred shares	(136)				(136)
Other comprehensive income adjustment	(17,311)					(16,910)	(401)
Net income	342				334		8
Ending balance at Mar. 31, 2020	$ 811,836	$ 92,427	$ 800	$ 1,169,929	$ (455,431)	$ (15,091)	$ 19,202