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v3.19.3.a.u2

Acquisition, Disposals and Assets Held for Sale Acquisition (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) ft² building_unit | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Gain on sale of real estate | $ 104,991 | $ 52,183 | $ 0
Cash |  | $ 28,000 |
Business Acquisition, Transaction Costs | 4,700 |  |
Central Place Tower [Member] |  |  |
Gain on sale of real estate | 53,400 |  |
Central Place Tower [Member] | Arlington, Virginia [Member] |  |  |
Gain on sale of real estate | $ 53,356 |  |
Prudential Global Investment Management (PGIM) [Member] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |
Area of real estate property (in square feet) | ft² | 552,000 |  |
Multifamily |  |  |
Number of Units in Real Estate Property | building_unit | 7,111 |  |
Multifamily | F1RST Residences [Member] | Washington, D.C. [Member] |  |  |
Number of Units in Real Estate Property | building_unit | 325 |  |
Area of real estate property (in square feet) | ft² | 21,000 |  |
Cash | $ 160,500 |  |
Occupancy, Percentage | 91.70% |  |

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