Equity Investments in Ground Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Aug. 31, 2019
Investment [Line Items]      
Ownership percentage 54.80%    
(Earnings) losses from equity method investments $ 403 $ 0  
Equity investments in Ground Leases 127,524 $ 0  
Joint Venture      
Investment [Line Items]      
Ownership percentage     54.80%
(Earnings) losses from equity method investments 400    
Equity investments in Ground Leases $ 127,500