Quarterly report pursuant to Section 13 or 15(d)

Real Estate Joint Ventures - Investments in Unconsolidated Real Estate Joint Ventures (Details)

v3.24.3
Real Estate Joint Ventures - Investments in Unconsolidated Real Estate Joint Ventures (Details)
$ in Thousands
Sep. 30, 2024
USD ($)
property
Dec. 31, 2023
USD ($)
Unconsolidated Real Estate Joint Ventures    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | property 24  
Carrying Value of Investment $ 36,350 $ 38,275
Unconsolidated Real Estate Joint Ventures | Investment in unconsolidated real estate joint ventures    
Schedule of Equity Method Investments [Line Items]    
Carrying Value of Investment 39,700 41,100
Unconsolidated Real Estate Joint Ventures | Other liabilities    
Schedule of Equity Method Investments [Line Items]    
Carrying Value of Investment $ (3,400) (2,800)
Redshift JV LLC    
Schedule of Equity Method Investments [Line Items]    
Nominal Ownership % 10.00%  
Number of Properties | property 3  
Carrying Value of Investment $ 20,955 21,053
BREIT COPT DC JV LLC    
Schedule of Equity Method Investments [Line Items]    
Nominal Ownership % 10.00%  
Number of Properties | property 9  
Carrying Value of Investment $ 9,781 10,629
Quark JV LLC    
Schedule of Equity Method Investments [Line Items]    
Nominal Ownership % 10.00%  
Number of Properties | property 2  
Carrying Value of Investment $ 6,711 6,727
B RE COPT DC JV III LLC    
Schedule of Equity Method Investments [Line Items]    
Nominal Ownership % 10.00%  
Number of Properties | property 2  
Carrying Value of Investment $ 2,273 2,643
B RE COPT DC JV II LLC    
Schedule of Equity Method Investments [Line Items]    
Nominal Ownership % 10.00%  
Number of Properties | property 8  
Carrying Value of Investment $ (3,370) (2,777)
Difference between the joint venture's lower cost basis and the entity's share of underlying equity in the net assets $ 6,700 $ 6,800