Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Contingency [Line Items]
Valuation allowance	$ 3,000		$ 3,000
Income tax expense (benefit)	$ 14,435	$ 13,790	$ 43,938	$ 33,520
Effective tax rate			24.90%	23.50%
Increase in effective tax rate due to decrease in domestic production activities deduction			1.40%
Excess tax benefits from stock based awards			$ 1,400	$ 3,300
Earliest Tax Year [Member] | Federal Tax Jurisdiction [Member]
Income Tax Contingency [Line Items]
Tax years subject to examination			2016
Latest Tax Year [Member] | Federal Tax Jurisdiction [Member]
Income Tax Contingency [Line Items]
Tax years subject to examination			2019