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Related Party Transactions - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
May 05, 2020
Jan. 01, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Related Party Transactions [Abstract]            
Maximum percentage of interest on amounts due from affiliates (percent)         6.96%  
Tax receivable agreement termination, cash payments per partnership unit exchanged (usd per share)   $ 1.50        
Tax receivable agreement termination, term of annual installments         5 years  
Tax receivable agreement termination, annual cash payments per partnership unit exchanged (usd per share)   $ 0.30        
Conversion of units, deferred consideration obligation, discount   $ 11.3        
Payment of aircraft related expenses     $ 0.9 $ 2.1 $ 4.2 $ 5.6
TCG BDC, Inc. | Affiliated Entity            
Related Party Transaction [Line Items]            
Purchase of investment (in shares) 2,000,000          
Purchase of investment (in dollars per share) $ 25          
Dividend rate, percentage 7.00%          
Dividend rate, payable in shares, percentage 9.00%          
Interest income         $ 1.4