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Information by Business Segment - Reconciliation of UJV NOI Allocable to COPT Defense to Equity in Income (Loss) of Unconsolidated Entities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment financial information for real estate operations |  |  |
UJV NOI allocable to COPT Defense | $ 7,217 | $ 6,659 | $ 4,327
Less: Income from UJVs allocable to COPT Defense attributable to depreciation and amortization expense, interest expense and gain on early extinguishment of debt | (6,820) | (6,917) | (3,145)
Add: Equity in (loss) income of unconsolidated non-real estate entities | 0 | (3) | 561
Equity in income (loss) of unconsolidated entities | 397 | (261) | 1,743
Reportable segments |  |  |
Segment financial information for real estate operations |  |  |
UJV NOI allocable to COPT Defense | $ 7,217 | $ 6,659 | $ 4,327

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