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Equity-Based and Other Deferred Compensation - Deferred Cash Compensation - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Compensation expense $ 34.7 $ 25.5 $ 8.8
Unrecognized compensation expense related to deferred cash awards $ 38.0    
Weighted-average period over compensation cost is expected to be recognized 1 year 6 months    
Minimum      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Vesting period 1 year    
Maximum      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Vesting period 4 years