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Long-term Debt - Additional Information (Detail)
1 Months Ended 9 Months Ended
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Debt Instrument [Line Items]      
Term loan facility maturity period   5 years  
Minimum [Member]      
Debt Instrument [Line Items]      
Notes payable Interest rate     2.00%
Maximum [Member]      
Debt Instrument [Line Items]      
Notes payable Interest rate     6.00%
Term Loan [Member]      
Debt Instrument [Line Items]      
Debt instrument maturity date   Apr. 30, 2025  
Master Loan Agreements [Member]      
Debt Instrument [Line Items]      
Payment Period, typical     60 months
Assets relating to master loan agreements, Gross $ 130,200,000   $ 134,400,000
Capital leased assets, net book value 68,200,000   $ 66,200,000
Term Loan Agreement [Member]      
Debt Instrument [Line Items]      
Debt instrument, face amount $ 400,000,000    
Term Loan Agreement [Member] | Term Loan [Member]      
Debt Instrument [Line Items]      
Term loan facility maturity period 7 years    
ABL Credit Agreement [Member]      
Debt Instrument [Line Items]      
Debt instrument, covenant requirements   requiring the satisfaction of a minimum fixed charge coverage ratio of 1.0x in the event that we do not meet a minimum measure of availability under the ABL Revolver.  
Fixed charge coverage ratio     1.0
ABL Credit Agreement [Member] | Eurodollar Rate Loan One [Member]      
Debt Instrument [Line Items]      
Margin interest rate percentage   1.25%  
ABL Credit Agreement [Member] | Eurodollar Rate Loan Two [Member]      
Debt Instrument [Line Items]      
Margin interest rate percentage   1.50%  
ABL Credit Agreement [Member] | Base Rate Loan One [Member]      
Debt Instrument [Line Items]      
Margin interest rate percentage   0.25%  
ABL Credit Agreement [Member] | Base Rate Loan Two [Member]      
Debt Instrument [Line Items]      
Margin interest rate percentage   0.50%  
ABL Credit Agreement [Member] | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Line of credit maximum borrowing capacity   $ 200,000,000.0  
Borrowings outstanding     $ 67,700,000
ABL Credit Agreement [Member] | Letter of Credit [Member]      
Debt Instrument [Line Items]      
Line of credit maximum borrowing capacity   75,000,000.0  
ABL Credit Agreement [Member] | Incremental Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Line of credit maximum borrowing capacity   50,000,000.0  
ABL Credit Agreement [Member] | Swing Line Loans [Member]      
Debt Instrument [Line Items]      
Line of credit maximum borrowing capacity   20,000,000.0  
ABL Third Amendment [Member] | Letter of Credit [Member]      
Debt Instrument [Line Items]      
Remaining borrowing availability     $ 161,300,000
5.75% Senior Notes Due 2028 [Member]      
Debt Instrument [Line Items]      
Debt instrument, face amount   $ 300,000,000.0  
Debt instrument maturity date   Feb. 01, 2028  
Notes payable Interest rate   5.75%  
Debt instrument, interest rate terms   interest will be payable semi-annually in cash in arrears on February 1 and August 1, commencing on February 1, 2020.  
Debt instrument, Frequency of periodic payment of interest   semi-annually  
Proceeds from senior note issuance   $ 295,000,000.0  
Term Loan Amendment Agreement [Member] | Term Loan [Member]      
Debt Instrument [Line Items]      
Margin interest rate percentage 1.25%    
Deferred financing costs and debt issuance costs, net $ 198,600,000    
Term Loan Amendment Agreement [Member] | Term Loan [Member] | London Inter Bank Offered Rate LIBRO member | Minimum [Member]      
Debt Instrument [Line Items]      
Margin interest rate percentage 2.25%    
Term Loan Amendment Agreement [Member] | Term Loan [Member] | London Inter Bank Offered Rate LIBRO member | Maximum [Member]      
Debt Instrument [Line Items]      
Margin interest rate percentage 2.50%