Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,441,725	$ 1,440,840
Accumulated Amortization	(821,775)	(778,437)
Intangible Assets, Net	619,950	662,403
Registered trademarks	79,000	79,000
Goodwill	1,929,283	1,924,052
Total	2,008,283	2,003,052
Proprietary Technology [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	628,082	627,819
Accumulated Amortization	(375,531)	(347,477)
Intangible Assets, Net	252,551	280,342
Customer Contracts and Relationships [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	813,643	813,021
Accumulated Amortization	(446,244)	(430,960)
Intangible Assets, Net	$ 367,399	$ 382,061