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Information by Business Segment - Reconciliation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of segment revenues to total revenues |  |  |
Construction contract and other service revenues | $ 60,179 | $ 154,632 | $ 107,876
Less: Revenues from discontinued operations (Note 4) | 0 | (1,980) | (30,490)
Total revenues | 684,982 | 739,030 | 664,446
Operating expenses |  |  |
Less: Property operating expenses from discontinued operations (Note 4) | 0 | (971) | (16,842)
Total property operating expenses | 247,385 | 227,430 | 213,377
Reconciliation of UJV NOI allocable to COPT to Equity Income in Unconsolidated entities [Abstract] |  |  |
UJV NOI allocable to COPT Defense | 6,659 | 4,327 | 4,029
Less: Income from UJVs allocable to COPT Defense attributable to depreciation and amortization expense, interest expense and gain on early extinguishment of debt | (6,917) | (3,145) | (2,930)
Add: Equity in (loss) income of unconsolidated non-real estate entities | (3) | 561 | (6)
Equity in (loss) income of unconsolidated entities | (261) | 1,743 | 1,093
Computation of net operating income from service operations |  |  |
Construction contract and other service revenues | 60,179 | 154,632 | 107,876
Construction contract and other service expenses | (57,416) | (149,963) | (104,053)
Real estate operations |  |  |
Reconciliation of segment revenues to total revenues |  |  |
Total revenues | 624,803 | 586,378 | 587,060
Operating expenses |  |  |
Segment property operating expenses | 247,385 | 228,401 | 230,219
Less: Property operating expenses from discontinued operations (Note 4) | 0 | (971) | (16,842)
Reconciliation of UJV NOI allocable to COPT to Equity Income in Unconsolidated entities [Abstract] |  |  |
UJV NOI allocable to COPT Defense | 6,659 | 4,327 | 4,029
Service operations |  |  |
Computation of net operating income from service operations |  |  |
NOI from service operations | $ 2,763 | $ 4,669 | $ 3,823

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