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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating Lease, Weighted Average Discount Rate, Percent 7.25%  
Operating Lease, Weighted Average Remaining Lease Term 36 years 8 months 12 days  
Operating Lease, Payments $ 25,400 $ 25,800
Future minimum lease obligations under non-cancelable operating and ground leases    
2021 24,363  
2022 20,041  
2023 19,725  
2024 18,866  
2025 16,708  
Thereafter 654,060  
Total undiscounted minimum lease payments 753,763  
Less: imputed interest (543,846)  
Operating lease liabilities 209,917 251,196
General and administrative expenses    
Operating Leases, Rent Expense $ 32,100 $ 32,600