Income Taxes (Detail) - Current and Long-Term Deferred Tax Assets and Liabilities - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Accrued liabilities	$ 67,888	$ 67,066
Loss and credit carryforwards	8,522	13,350
Assets relating to equity compensation	22,686	19,920
Other assets	6,712	3,420
Gross deferred tax assets	105,808	103,756
Property, equipment, and leasehold improvements	(9,904)	(10,817)
Intangible assets	(55,275)	(29,400)
Prepaid expenses	(28,535)	(26,584)
Other liabilities	(7,244)	(3,591)
Gross deferred tax liabilities	(100,958)	(70,392)
Valuation allowance	(1,828)	(570)
Net deferred tax assets (1)	$ 3,022	$ 32,794