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v3.20.1

Disposition and Assets Held for Sale (Details) $ in Thousands |  | 3 Months Ended |
--- | --- | --- | ---
Jan. 15, 2020 USD ($) ft² | Mar. 31, 2020 USD ($) ft² | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Proceeds from sale of real estate |  | $ 154,493 | $ 117,676 |
Gain on sale of real estate |  | 59,477 | 39,033 |
Assets held for sale |  | 73,876 |  | $ 168,412
Liabilities related to assets held for sale |  | $ 213 |  |
Arlington, Virginia |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Area of real estate property (in square feet) | ft² |  |  |  | 4,230
Assets held for sale |  |  |  | $ 168,412
Arlington, Virginia | Metropolitan Park |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Area of real estate property (in square feet) | ft² | 2,150 |  |  | 2,150
Gross sales price | $ 154,952 |  |  |
Proceeds from sale of real estate | 154,493 |  |  |
Gain on sale of real estate | $ 59,477 |  |  |
Assets held for sale |  |  |  | $ 94,517
Arlington, Virginia | Pen Place - Land Parcel |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Area of real estate property (in square feet) | ft² |  | 2,080 |  | 2,080
Gross sales price |  |  | $ 149,900 |
Assets held for sale |  | $ 73,876 |  | $ 73,895
Liabilities related to assets held for sale |  | $ 213 |  |

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