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Long-Term Debt (New Credit Facility) - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Mar. 17, 2021
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Nov. 13, 2020
Debt Instrument [Line Items]          
Repayments of revolving facility     $ 305,000,000 $ 100,000,000  
Term Loan A- Facility [Member]          
Debt Instrument [Line Items]          
Line of credit outstanding principal amount         $ 352,400,000
New Credit Facility [Member]          
Debt Instrument [Line Items]          
Date entered into an agreement Mar. 17, 2021        
Repayments of revolving facility   $ 35,000,000.0      
Term loan remaining balance due date     Mar. 17, 2026    
Maximum incremental debt amount   $ 480,000,000.0 $ 480,000,000.0    
Incremental debt amount maximum percentage of consolidated EBITDA   100.00% 100.00%    
Consolidated senior secured net leverage ratio   350.00% 350.00%    
Maximum consolidated net leverage ratio   500.00% 500.00%    
Minimum interest coverage ratio   300.00% 300.00%    
New Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate     1.75%    
New Credit Facility [Member] | Base Rate Loans [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate     0.75%    
New Credit Facility [Member] | September 30, 2021 to March 31, 2022 [Member]          
Debt Instrument [Line Items]          
Term loan principal repayments     $ 2,700,000    
New Credit Facility [Member] | June 30, 2022 to March 31, 2024 [Member]          
Debt Instrument [Line Items]          
Term loan principal repayments     5,300,000    
New Credit Facility [Member] | June 30, 2024 to March 31, 2025 [Member]          
Debt Instrument [Line Items]          
Term loan principal repayments     8,000,000.0    
New Credit Facility [Member] | June 30, 2025 to December 31, 2025 [Member]          
Debt Instrument [Line Items]          
Term loan principal repayments     10,600,000    
New Credit Facility [Member] | Senior Secured Revolving Line of Credit [Member]          
Debt Instrument [Line Items]          
Line of credit outstanding principal amount $ 600,000,000.0 $ 125,000,000 125,000,000    
Debt instrument maturity date Mar. 17, 2026        
Amount available under revolving line of credit   470,700,000 $ 470,700,000    
Unused fee payable percentage     0.25%    
New Credit Facility [Member] | Term Loan A- Facility [Member]          
Debt Instrument [Line Items]          
Line of credit outstanding principal amount $ 425,000,000.0 422,344,000 $ 422,344,000    
Debt instrument maturity date Mar. 17, 2026        
New Credit Facility [Member] | Letters of Credit [Member]          
Debt Instrument [Line Items]          
Line of credit outstanding principal amount $ 20,000,000.0        
New Credit Facility [Member] | Swingline Facility [Member]          
Debt Instrument [Line Items]          
Line of credit outstanding principal amount $ 20,000,000.0        
New Credit Facility [Member] | Standby Letters of Credit [Member]          
Debt Instrument [Line Items]          
Line of credit outstanding principal amount   $ 4,300,000 $ 4,300,000    
Amended and Restated Credit Agreement [Member]          
Debt Instrument [Line Items]          
Agreement termination date Mar. 17, 2021