Annual report pursuant to Section 13 and 15(d)

Real Estate Joint Ventures (Details)

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Real Estate Joint Ventures (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
ft²
property
Dec. 05, 2019
property
Jun. 20, 2019
property
Dec. 31, 2017
property
Consolidated real estate joint ventures        
Investments in consolidated real estate joint ventures        
Total Assets $ 464,393      
Encumbered Assets 263,918      
Total Liabilities $ 185,379      
Stevens Investors, LLC | Primary Beneficiary        
Investments in consolidated real estate joint ventures        
Nominal Ownership % 95.00%      
Total Assets $ 126,603      
Encumbered Assets 126,112      
Total Liabilities $ 56,268      
Stevens Investors, LLC | Minimum        
Investments in consolidated 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%      
LW Redstone Company, LLC        
Investments in consolidated real estate joint ventures        
Partner's capital account upon formation $ 9,000      
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 4,400,000      
Construction commencement completed (in sqft) | ft² 1,500,000      
LW Redstone Company, LLC | Primary Beneficiary        
Investments in consolidated real estate joint ventures        
Nominal Ownership % 85.00%      
Total Assets $ 249,875      
Encumbered Assets 73,911      
Total Liabilities 73,083      
LW Redstone Company, LLC | Maximum        
Investments in consolidated real estate joint ventures        
Infrastructure costs anticipated to be funded by entity for reimbursement by the City of Huntsville (in dollars) $ 76,000      
Percentage of residual distributable cash flows in excess of unpaid cumulative preferred returns and return of invested capital entitled to the company 85.00%      
LW Redstone Company, LLC | Notes receivable from City of Huntsville        
Investments in consolidated real estate joint ventures        
Infrastructure costs funded to date for reimbursement by the City of Huntsville $ 49,000      
M Square Associates, LLC        
Investments in consolidated real estate joint ventures        
Percentage of residual amounts distributed to each member 50.00%      
M Square Associates, LLC | Primary Beneficiary        
Investments in consolidated real estate joint ventures        
Nominal Ownership % 50.00%      
Total Assets $ 87,915      
Encumbered Assets 63,895      
Total Liabilities $ 56,028      
Disposed of by sale        
Investments in consolidated real estate joint ventures        
Number of real estate properties | property       12
BREIT COPT DC JV LLC | Variable Interest Entity, Not Primary Beneficiary        
Investments in consolidated real estate joint ventures        
Ownership percentage 10.00%      
Data Center Shells in Northern Virginia | Disposed of by sale        
Investments in consolidated real estate joint ventures        
Ownership percentage sold 90.00%      
Number of real estate properties | property 9 2 7