Equity - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($) $ / shares shares	Dec. 31, 2018 shares	Jul. 31, 2015 shares
Equity [Line Items]
Authorized amount (in shares)			10,000,000	10,000,000
Treasury stock acquired (in shares)	441,581	925,775
Treasury stock acquired, average cost (in dollars per share) | $ / shares	$ 8.13	$ 7.93
OP unit equivalent in common shares	1.13
Partners' capital account (in units)	3,138,000
Share-based Payment Arrangement
Equity [Line Items]
Shares granted (in shares)	41,186	46,561
Grant date fair value | $	$ 345,000	$ 431,000
At The Market
Equity [Line Items]
Sale of stock, authorized amount (up to) | $	$ 100,000,000