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Accrued Liabilities - Composition of Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Accrued payroll and benefits $ 53,782 $ 58,877
Accrued customer rebates 24,833 16,729
Other accrued liabilities 16,955 17,170
Total accrued liabilities $ 95,570 $ 92,776