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Commitments and Contingencies - Minimum Commitment Under Ground Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Minimum commitment under our ground leases      
2021 $ 5,641    
2022 5,642    
2023 5,662    
2024 5,662    
2025 5,662    
Thereafter 280,723    
Total 308,992    
Present value discount (211,214)    
Ground lease liabilities $ 97,778 $ 98,400 $ 98,349