Schedule of Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Marketable securities	$ 956,252	$ 743,624
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and cash equivalents	297,937	264,705
Marketable securities	956,252	743,624
Derivative assets	1	109
Contingent consideration	32,887	37,436
Derivative liabilities	361	146
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and cash equivalents	297,937	264,705
Marketable securities	956,252	743,624
Derivative assets	1	109
Contingent consideration	32,887	37,436
Derivative liabilities	$ 361	$ 146

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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