Quarterly report pursuant to Section 13 or 15(d)

Real Estate Joint Ventures (Details 2)

v3.19.3
Real Estate Joint Ventures (Details 2)
$ in Thousands
Sep. 30, 2019
USD ($)
property
Dec. 31, 2018
USD ($)
Unconsolidated Real Estate Joint Ventures    
Schedule of Equity Method Investments [Line Items]    
Number of real estate properties | property 13  
Equity method investments | $ $ 49,408 $ 39,845
GI-COPT DC Partnership LLC    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage (percent) 50.00%  
Number of real estate properties | property 6  
Equity method investments | $ $ 38,273 39,845
Variable Interest Entity, Not Primary Beneficiary | BREIT COPT DC JV LLC    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage (percent) 10.00%  
Number of real estate properties | property 7  
Equity method investments | $ $ 11,135 $ 0