Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Line Items]
Income tax expense	$ 13,029	$ 28,098
Effective tax rate for income tax expense (as a percent)	30.70%	32.30%
Document Fiscal Year Focus	2017
U.S. federal statutory rate (as a percent)	35.00%
Excess tax benefits	$ 1,909
Valuation allowance amount	20,241
Liability for uncertain tax positions noncurrent	3,197
U.S.
Income Tax Disclosure [Line Items]
Valuation allowance amount	2,350
Foreign
Income Tax Disclosure [Line Items]
Valuation allowance amount	$ 17,891