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Long-Term Debt - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
Dec. 01, 2017
Nov. 30, 2017
Feb. 01, 2016
Debt Instrument [Line Items]              
Write off of debt issuance costs $ 1,700,000            
Loss on debt extinguishment $ 3,100,000            
Debt instrument, covenant description     (i) the leverage covenant threshold has increased through fiscal year 2019, (ii) the Company and the other loan parties secured the obligations with liens on substantially all of their personal property, and (iii) such liens will be released upon the Company’s leverage ratio being less than or equal to 4.00 to 1.00 no earlier than the fiscal quarter ended on December 31, 2019.        
Average interest rate on debt outstanding   3.54%          
Credit agreement interest rate including effect of interest rate swaps   3.21%          
Maximum              
Debt Instrument [Line Items]              
Debt instrument leverage ratio 400.00% 400.00% 400.00%        
2022 Notes              
Debt Instrument [Line Items]              
Repurchase amount of notes $ 21,400,000   $ 21,400,000 $ 0      
2024 Notes              
Debt Instrument [Line Items]              
Repurchase amount of notes 118,800,000            
Revolving Credit Facility              
Debt Instrument [Line Items]              
Revolving credit facility - maximum borrowing capacity         $ 750,000,000 $ 900,000,000 $ 750,000,000
Revolving Credit Facility              
Debt Instrument [Line Items]              
Fees related to amended and restated credit agreement 600,000 $ 600,000 $ 600,000        
Term loan maturity date     Jan. 31, 2025        
Revolving Credit Facility              
Debt Instrument [Line Items]              
Fees related to amended and restated credit agreement $ 1,800,000 $ 1,800,000 $ 1,800,000        
Term loan maturity date     Feb. 01, 2023