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Dispositions and Impairment - Additional Information (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 USD ($) property | Jun. 30, 2020 USD ($) property | Jun. 30, 2021 USD ($) property | Jun. 30, 2020 USD ($) impairment_charge property | Dec. 31, 2020 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Number of properties disposed | property | 135 |  | 135 |  |
Debt satisfaction gain |  |  |  | $ 1,393 |
Number of real estate properties held for sale | property | 3 |  | 3 |  | 2
Number of impairment charges | impairment_charge |  |  |  | 1 |
Impairment charges | $ 0 | $ 1,617 | $ 0 | $ 1,617 |
Properties in Charleston, SC | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Number of properties disposed | property |  | 1 |  | 1 |
Transferred Property | Office Building |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Aggregate gross disposition price |  |  | 183,427 | $ 74,064 |
Sold Properties |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Gain on sale of properties |  |  | $ 88,645 | $ 20,998 |

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