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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Tax Contingency [Line Items]    
Effective tax rate 33.00% 35.00%
Income tax expense (benefit) $ 13,747 $ 12,737
Effective income tax rate reconciliation, percentage 2.00% 2.00%
Excess tax benefits from stock based awards $ 1,000 $ 400
Valuation allowance $ 4,100  
Earliest Tax Year [Member] | Federal Tax Jurisdiction [Member]    
Income Tax Contingency [Line Items]    
Tax years subject to examination 2013  
Latest Tax Year [Member] | Federal Tax Jurisdiction [Member]    
Income Tax Contingency [Line Items]    
Tax years subject to examination 2016