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Long-term Debt - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Jul. 31, 2021
USD ($)
May 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
Nov. 30, 2018
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]              
Repayment of term loan         $ 524,300,000 $ 5,350,000 $ 5,350,000
Loss on debt extinguishment         (7,748,000) 0 0
Proceeds from long term line of credit         0 40,000,000 0
Repayment of long term line of credit         0 40,000,000 $ 0
Letters of credit outstanding         0 $ 0  
2018 Term Loan              
Debt Instrument [Line Items]              
Debt instrument face value       $ 535,000,000      
Repayment of term loan $ 521,600,000            
Loss on debt extinguishment $ 7,700,000            
Debt issuance costs         $ 6,500,000    
Average interest rate         4.60% 5.10% 6.70%
Repayment of long term line of credit           $ 5,350,000 $ 5,350,000
Effective interest rate           5.10%  
2018 Revolving Facility              
Debt Instrument [Line Items]              
Line of credit outstanding           $ 0  
2021 Revolving Facility              
Debt Instrument [Line Items]              
Total net first lien leverage ratio         4.50    
Percent of total commitments not reimbursed         35.00%    
Line of credit outstanding         $ 0    
Federal Funds Effective Rate | 2021 Revolving Facility              
Debt Instrument [Line Items]              
Effective interest rate 0.50%            
London Interbank Offered Rate (LIBOR) | 2018 Term Loan              
Debt Instrument [Line Items]              
Interest drawn spread       0.045      
Basis spread           0.20%  
Base Rate | 2018 Term Loan              
Debt Instrument [Line Items]              
Interest drawn spread       0.035      
Covid-19 | 2018 Revolving Facility              
Debt Instrument [Line Items]              
Proceeds from long term line of credit     $ 40,000,000        
Repayment of long term line of credit   $ 40,000,000          
Revolving Credit Facility | 2018 Revolving Facility              
Debt Instrument [Line Items]              
Debt instrument face value       $ 40,000,000      
Debt issuance costs         $ 200,000    
Total net first lien leverage ratio, maximum       7.9      
Revolving Credit Facility | 2021 Revolving Facility              
Debt Instrument [Line Items]              
Line of credit maximum borrowing capacity $ 150,000,000            
Debt issuance costs $ 800,000            
One month LIBOR floor 1.00%            
Rate added to one month LIBOR 1.00%            
LIBOR floor 0.00%            
Rate added to LIBOR 2.00%            
Basis spread on variable rate, initial reduction 0.25%            
Basis spread on variable rate, further reduction 0.25%            
Total net first lien leverage ratio, first reduction requirement 3.50            
Total net first lien leverage ratio, second reduction requirement 2.50            
Commitment fee 0.35%            
Commitment fee reduction 0.10%            
Total net first lien leverage ratio, maximum 3.50            
Letter of Credit              
Debt Instrument [Line Items]              
Line of credit maximum borrowing capacity $ 20,000,000            
Swingline Loan              
Debt Instrument [Line Items]              
Line of credit maximum borrowing capacity $ 10,000,000