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Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended			9 Months Ended	1 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Dec. 31, 2013	Sep. 27, 2014 2014 Acquisitions [Member]	Jan. 31, 2014 ULSP [Member]	Jan. 31, 2014 ULSP [Member] Unpatented Technology [Member]	Jul. 31, 2014 Medimass [Member]	Jul. 31, 2014 Medimass [Member] Unpatented Technology [Member]	Jul. 31, 2014 Medimass [Member] In-Process Research and Development [Member]
Business Acquisition [Line Items]
Accounts receivable and other assets acquired				$ 550
Intangible assets acquired				18,457		1,000	18,000	13,000	5,000
Goodwill	358,464		350,350	11,631	3,000		8,000
Total assets acquired				30,638
Accrued expenses and other liabilities acquired				294
Accrued contingent consideration				3,336			3,336
Net assets acquired				27,008
Cash consideration paid	$ 23,672	$ 26,434			$ 4,000		$ 23,000
Weighted-average useful life of acquired intangible assets						10 years		15 years
Pro forma effect of business acquisitions				The impact of these acquisitions, either individually or in the aggregate, on the Company's revenues and net income since the acquisition dates for the nine months ended September 27, 2014 was immaterial.