Quarterly report pursuant to Section 13 or 15(d)

Information by Business Segment - Reconciliation of Revenue (Details)

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Information by Business Segment - Reconciliation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Reconciliation of segment revenues to total revenues        
Construction contract and other service revenues $ 42,557 $ 19,988 $ 95,757 $ 36,546
Revenues from real estate operations from discontinued operations (Note 4) 0 (7,204) (1,980) (14,538)
Total revenues 185,803 157,207 381,283 311,595
Operating Expenses [Abstract]        
Less: Property operating expenses from discontinued operations (Note 4) 0 (3,702) (971) (7,400)
Total property operating expenses 54,116 50,914 111,297 104,190
Reconciliation of UJV NOI allocable to COPT to Equity Income in Unconsolidated entities [Abstract]        
UJV NOI allocable to COPT 1,080 973 2,160 1,890
Less: Income from UJV allocable to COPT attributable to depreciation and amortization expense and interest expense (760) (711) (1,518) (1,404)
Add: Equity in (loss) income of unconsolidated non-real estate entities (2) (2) 564 (4)
Equity in income of unconsolidated entities 318 260 1,206 482
Computation of net operating income from service operations        
Construction contract and other service revenues 42,557 19,988 95,757 36,546
Construction contract and other service expenses (41,304) (19,082) (92,954) (34,875)
Real estate operations        
Reconciliation of segment revenues to total revenues        
Total revenues 143,246 144,423 287,506 289,587
Operating Expenses [Abstract]        
Property operating expenses 54,116 54,616 112,268 111,590
Less: Property operating expenses from discontinued operations (Note 4) 0 (3,702) (971) (7,400)
Reconciliation of UJV NOI allocable to COPT to Equity Income in Unconsolidated entities [Abstract]        
UJV NOI allocable to COPT 1,080 973 2,160 1,890
Service operations        
Computation of net operating income from service operations        
NOI from service operations $ 1,253 $ 906 $ 2,803 $ 1,671