Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Line Items]
Income tax expense	$ 34,654	$ 34,818	$ 62,752	$ 57,294
Effective tax rate for income tax expense	32.70%	36.50%	32.50%	35.80%
U.S. federal statutory rate			35.00%
Valuation allowance amount	$ 14,898		$ 14,898
Liability for uncertain tax positions noncurrent	3,196		3,196
U.S. [Member]
Income Tax Disclosure [Line Items]
Valuation allowance amount	2,096		2,096
Foreign [Member]
Income Tax Disclosure [Line Items]
Valuation allowance amount	$ 12,802		$ 12,802