Annual report pursuant to Section 13 and 15(d)

Real Estate Joint Ventures (Narrative) (Details)

v3.22.4
Real Estate Joint Ventures (Narrative) (Details)
$ in Thousands, ft² in Millions
12 Months Ended
Dec. 22, 2020
USD ($)
property
Dec. 31, 2022
USD ($)
ft²
property
Dec. 31, 2021
USD ($)
property
Dec. 31, 2020
USD ($)
property
Dec. 21, 2020
Investments in real estate joint ventures          
Ownership percentage sold   90.00% 90.00% 90.00%  
Number of properties sold | property   2 2 2  
Gain on sale of investment in unconsolidated real estate joint venture   $ 0 $ 0 $ 29,416  
BRE-COPT 2          
Investments in real estate joint ventures          
Nominal Ownership % 10.00% 10.00%   10.00%  
BRE-COPT 3          
Investments in real estate joint ventures          
Nominal Ownership %   10.00% 10.00%    
Quark          
Investments in real estate joint ventures          
Nominal Ownership %   10.00%      
GI-COPT DC Partnership LLC          
Investments in real estate joint ventures          
Nominal Ownership %         50.00%
Ownership interest sold of the original 50% owned 80.00%        
Proceeds from sale of investment in unconsolidated real estate joint venture $ 60,000        
Gain on sale of investment in unconsolidated real estate joint venture $ 29,400        
LW Redstone Company, LLC          
Investments in real estate joint ventures          
Partner's capital account upon formation   $ 9,000      
Percentage of cumulative preferred returns of cash flows on partners' invested capital   13.50%      
Percentage of cumulative preferred returns of cash flows on our invested capital   13.50%      
Percentage of residual distributable cash flows in excess of unpaid cumulative preferred returns and return of invested capital entitled to the company   85.00%      
Percentage of residual distributable cash flows in excess of unpaid cumulative preferred returns and return of invested capital entitled to the entity's partners   15.00%      
Number of years following construction commencement threshold achievement before partner's interest can be purchased at fair value   5 years      
Construction commencement threshold (in square feet) | ft²   4.4      
Construction commencement completed (in sqft) | ft²   2.5      
LW Redstone Company, LLC | Maximum          
Investments in real estate joint ventures          
Infrastructure costs anticipated to be funded by entity for reimbursement by the City of Huntsville (in dollars)   $ 76,000      
LW Redstone Company, LLC | Notes receivable from the City of Huntsville          
Investments in real estate joint ventures          
Infrastructure costs funded to date for reimbursement by the City of Huntsville   $ 70,400      
Stevens Investors, LLC | Maximum          
Investments in real estate joint ventures          
Percentage of residual distributable cash flows in excess of unpaid cumulative preferred returns and return of invested capital entitled to the company   85.00%      
Stevens Investors, LLC | Minimum          
Investments in real estate joint ventures          
Percentage of residual distributable cash flows in excess of unpaid cumulative preferred returns and return of invested capital entitled to the company   60.00%      
M Square Associates, LLC          
Investments in real estate joint ventures          
Percentage of residual amounts distributed to each member   50.00%      
GI-COPT DC Partnership LLC | BRE-COPT 2          
Investments in real estate joint ventures          
Number of properties sold | property 6