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Leases - Future Minimum Lease Payments on Ground Leases, Current Year (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
2021 $ 1,518  
2022 1,518  
2023 1,518  
2024 1,518  
2025 1,518  
Thereafter 65,262  
Total undiscounted lease payments 72,852  
Present value discount (43,748)  
Ground lease liabilities $ 29,104 $ 29,307