Acquisition, Dispositions and Assets Held for Sale (Details) $ in Thousands |
Sep. 30, 2021
USD ($)
ft²
|
Dec. 31, 2020
USD ($)
ft²
|
---|---|---|
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
Assets held for sale | $ 74,174 | $ 73,876 |
Disposal Group, Held-for-sale | Pen Place | Arlington, Virginia | ||
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
Area of real estate property | ft² | 2,082 | 2,082 |
Assets held for sale | $ 74,174 | $ 73,876 |