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Leases - Future Minimum Lease Payments on Ground Leases (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Remainder of 2020 $ 1,139  
2021 1,518  
2022 1,518  
2023 1,518  
2024 1,518  
Thereafter 66,780  
Total undiscounted cash flows 73,991  
Present value discount (44,735)  
Ground lease liabilities $ 29,256 $ 29,307