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Dispositions of Property (Details) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 29, 2021 USD ($) | May 27, 2021 USD ($) property | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($)
Dispositions of properties |  |  |  |  |  |
Gain (loss) on sale of property |  |  | $ 20,626 |  | $ 20,626 |
Office Properties in Atlanta, Georgia |  |  |  |  |  |
Dispositions of properties |  |  |  |  |  |
Number of properties sold | property |  | 3 |  |  |  |
Gain (loss) on sale of property |  | $ 22,700 |  |  |  |
Sale price |  | $ 219,500 |  |  |  |
Office Property in Dulles, Virginia |  |  |  |  |  |
Dispositions of properties |  |  |  |  |  |
Gain (loss) on sale of property | $ (2,100) |  |  |  |  |
Disposal group disposed of by sale, not classified as discontinued operations |  |  |  |  |  |
Operating results for discontinued operations: |  |  |  |  |  |
Rental revenue |  |  | 4,139 | $ 6,670 | 10,722 | $ 13,528
Rental operating expenses |  |  | (1,525) | (2,237) | (3,832) | (4,653)
Real estate taxes and insurance |  |  | (621) | (1,021) | (1,644) | (2,029)
Depreciation and amortization |  |  | (537) | (2,655) | (3,107) | (5,368)
Net income (loss) from discontinued operations |  |  | $ 1,456 | $ 757 | $ 2,139 | $ 1,478

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