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Compensation and Benefits - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Compensation Arrangements [Line Items]          
Deferred compensation liability $ 5,039   $ 6,840 $ 5,039  
Shares available for future issuance     11,540,776    
Options grants in the the period, weighted average grant date fair value (in dollars per share)       $ 1.84  
Options Exercised (in shares)     61,334 19,661  
Unrecorded compensation expense $ 34,800   $ 42,100 $ 34,800  
Phantom Shares of Class A Common Stock          
Compensation Arrangements [Line Items]          
Distributions made under Director Plan (in shares)     75,038 78,416  
Phantom Shares of Class A Common Stock | Director Plan          
Compensation Arrangements [Line Items]          
Deferred compensation percentage of compensation directors elected     100.00%    
Distributions made under Director Plan (in shares)     11,070 0  
Shares forfeited   49,673      
Shares outstanding (in shares) 533,444   597,412 533,444  
Reinstated compensation percentage of compensation directors elected 50.00%        
Class B-1 Unit          
Compensation Arrangements [Line Items]          
Weighted average grant date fair value $ 3.98   $ 2.41 $ 3.98  
Units Exercised (in shares)     0 0  
Aggregate intrinsic value     $ 11,164    
Options to Purchase Operating Company Class B Units          
Compensation Arrangements [Line Items]          
Shares forfeited       187,166  
Net Class B units issued from exercise of options     32,947 603  
Redemption of Class B units for cashless exercise of options (in shares)     28,387 19,058  
Options to Purchase Operating Company Class B Units | Contingent Options to Purchase Shares of Class A Common Stock          
Compensation Arrangements [Line Items]          
Number of shares vested during period     500,000 0  
Restricted Shares of Class A Common Stock | Director Plan          
Compensation Arrangements [Line Items]          
Shares available for future issuance     5,074    
Vesting, description     These restricted shares will vest quarterly of the calendar year.    
Equity Incentive Plan 2006          
Compensation Arrangements [Line Items]          
Cash compensation paid in the form of equity     $ 6,800    
Shares available for future issuance     4,984,985    
Equity Incentive Plan 2006 | Delayed Exchange Class B Units          
Compensation Arrangements [Line Items]          
Exchange limitation period     7 years    
Equity Incentive Plan 2006 | Phantom Class B Units          
Compensation Arrangements [Line Items]          
Vesting period for units (in years)     10 years    
Weighted average grant date fair value $ 4.00   $ 3.93 $ 4.00 $ 4.05
Bonus plan          
Compensation Arrangements [Line Items]          
Vesting period for units (in years)     4 years    
Bonus plan | Phantom Class B Units          
Compensation Arrangements [Line Items]          
Vesting period for units (in years)     4 years