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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 |  |

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