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Certain Balance Sheet Accounts - Summary of Accrued Expenses and Other Current Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Payroll and related benefits $ 35,467 $ 34,809
Taxes 2,991 3,912
Other 15,607 10,908
Total $ 54,065 $ 49,629