Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,440,840	$ 1,003,247
Accumulated Amortization	(778,437)	(707,601)
Intangible Assets, Net	662,403	295,646
Registered trademarks	79,000	52,000
Goodwill	1,924,052	1,222,601	$ 1,200,746
Total	2,003,052	1,274,601
Proprietary Technology [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	627,819	450,852
Accumulated Amortization	(347,477)	(302,284)
Intangible Assets, Net	280,342	148,568
Customer Contracts and Relationships [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	813,021	552,395
Accumulated Amortization	(430,960)	(405,317)
Intangible Assets, Net	$ 382,061	$ 147,078