Equity - Additional Information (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) shares	Jul. 31, 2015 shares
Equity [Line Items]
Proceeds from issuance of common shares | $	$ (2,818)	$ 16,848
Authorized amount (in shares)			10,000,000
Treasury stock acquired (in shares)	925,775	0
Treasury stock acquired, average cost (in dollars per share) | $ / shares	$ 7.93
OP unit equivalent in common shares	1.13
Partners' capital account (in units)	3,206,000
Stock Compensation Plan [Member]
Equity [Line Items]
Shares granted (in shares)	46,561	36,136
Grant date fair value | $	$ 431	$ 382
At The Market [Member]
Equity [Line Items]
Common shares issued during period (in shares)		1,593,603
Proceeds from issuance of common shares | $		$ 17,362