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Long-Term Debt, Net - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Debt instrument basis spread on variable rate 1.00%  
Revolving Credit Agreement [Member]    
Debt Instrument [Line Items]    
Line of credit facility agreement date Feb. 12, 2018  
Debt instrument, restrictive covenants maintain a fixed charge coverage ratio of not less than 1.25 to 1.0 and a funded indebtedness to EBITDA ratio of not greater than 2.0 to 1.0  
Line of credit facility, maximum borrowing capacity $ 50,000,000.0  
Line of credit facility maximum borrowing capacity subject to certain conditions $ 100,000,000.0  
Line of credit facility, maturity date Feb. 12, 2020  
Line of credit facility, borrowings outstanding $ 0  
Revolving Credit Agreement [Member] | First Amendment to the Revolving Credit Agreement [Member]    
Debt Instrument [Line Items]    
Line of credit facility, maximum borrowing capacity 75,000,000.0  
Line of credit facility maximum borrowing capacity subject to certain conditions $ 125,000,000.0  
Line of credit facility, maturity date Apr. 15, 2022  
Revolving Credit Agreement [Member] | Swingline Loans [Member]    
Debt Instrument [Line Items]    
Line of credit facility, maximum borrowing capacity $ 5,000,000.0  
Revolving Credit Agreement [Member] | Letters of Credit [Member]    
Debt Instrument [Line Items]    
Line of credit facility, maximum borrowing capacity $ 2,500,000  
Revolving Credit Agreement [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Fixed charge coverage ratio required by covenants 1.25  
Revolving Credit Agreement [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Funded indebtedness to EBITDA ratio required by covenants 2.0  
Revolving Credit Agreement [Member] | Prime Rate [Member]    
Debt Instrument [Line Items]    
Debt instrument basis spread on variable rate 1.00%  
Revolving Credit Agreement [Member] | Adjusted London Interbank Offered Rate LIBOR [Member]    
Debt Instrument [Line Items]    
Debt instrument basis spread on variable rate 1.50%  
Term Credit Agreement [Member]    
Debt Instrument [Line Items]    
Line of credit facility agreement date Dec. 07, 2017  
Debt instrument, restrictive covenants maintain a fixed charge coverage ratio of not less than 1.25 to 1.0 and a funded indebtedness to EBITDA ratio of not greater than 2.0 to 1.0.  
Term Credit Agreement [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Fixed charge coverage ratio required by covenants 1.25  
Term Credit Agreement [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Funded indebtedness to EBITDA ratio required by covenants 2.0  
Term Credit Agreement [Member] | Term Loan [Member]    
Debt Instrument [Line Items]    
Debt instrument maturity date Sep. 07, 2025  
Term Credit Agreement [Member] | Term Loan [Member] | Prime Rate [Member]    
Debt Instrument [Line Items]    
Debt instrument basis spread on variable rate 1.00%  
Term Credit Agreement [Member] | Term Loan [Member] | Adjusted London Interbank Offered Rate LIBOR [Member]    
Debt Instrument [Line Items]    
Debt instrument basis spread on variable rate 1.50%  
Term Credit Agreement [Member] | Term Loan [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost $ 100,000 $ 200,000