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Real Estate - Net Lease Venture (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]        
Equity interest (as a percent)   50.00%   50.00%
Equity method investment, partner ownership percentage 47.50%   47.50%  
Revenues $ 115,054 $ 145,338 $ 384,930 $ 350,608
Net Lease Venture | Management Fees | Other income        
Schedule of Equity Method Investments [Line Items]        
Revenues $ 400 $ 400 $ 1,100 $ 1,100
Net Lease Venture | Net Lease        
Schedule of Equity Method Investments [Line Items]        
Equity interest (as a percent) 51.90%   51.90%  
Equity method investment, related party ownership percentage 0.60%   0.60%  
Equity method investment, related party promote fee percentage 50.00%   50.00%