Quarterly report pursuant to Section 13 or 15(d)

Long Term Debt Activity - Additional Information (Detail)

v3.10.0.1
Long Term Debt Activity - Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended
Mar. 29, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Debt Instrument [Line Items]        
Incurred debt issue costs   $ 5,103 $ 817  
Carrying value of long-term debt   1,812,349   $ 1,817,295
Fair value of long-term debt   1,804,535   $ 1,840,918
Amended Senior Secured Credit Facility        
Debt Instrument [Line Items]        
Debt instrument, reduction in interest rate 0.25%      
Quarterly principal payments due $ 1,649      
Last quarterly payment date Dec. 31, 2024      
Final principal payment $ 613,351      
Incurred debt issue costs   4,962    
Wrote-off of unamortized debt issuance costs   780    
Debt amendment, legal and other fees   $ 704    
Amended Senior Secured Credit Facility | Term Loan Credit facility        
Debt Instrument [Line Items]        
Final principal payment due date Mar. 29, 2025