Equity - Additional Information (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 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)	1,329,940	441,581
Treasury stock acquired, average cost (in dollars per share) | $ / shares	$ 8.28	$ 8.13
Shares remaining available for repurchase (in shares)	8,976,315
OP unit equivalent in common shares	1.13
Partners' capital account (in units)	2,711,000
Share-based Payment Arrangement
Equity [Line Items]
Shares granted (in shares)	35,880	54,726
Grant date fair value | $	$ 375	$ 470
At-The-Market Program
Equity [Line Items]
Common shares amount available for issuance | $	$ 189,584
Number of shares sold	5,950,882	3,020,190
Proceeds from sale of stock | $	$ 61,032	$ 31,083
At-The-Market Program | Forward Contracts
Equity [Line Items]
Number of shares to be settled on a forward basis (in shares)	3,875,751
Weighted average forward contract price | $ / shares	$ 11.23
Underwritten Offering
Equity [Line Items]
Number of shares sold	17,250,000	10,000,000
Sale of stock (in dollars per share) | $ / shares	$ 9.60	$ 10.09
Proceeds from sale of stock | $	$ 164,000	$ 100,749