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Acquisitions (Details) (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 28, 2014	Dec. 31, 2013	Jun. 28, 2014 ULSP [Member]	Jun. 28, 2014 Medimass [Member]
Business Acquisition [Line Items]
Accounts receivable and other current assets acquired			$ 448
Property, plant and equipment acquired			50
Intangible assets acquired			657
Goodwill	354,079	350,350	2,754
Total assets acquired			3,909
Accrued expenses and other current liabilities acquired			130
Deferred tax liability acquired			164
Cash consideration paid for acquired entity			$ 3,615	$ 23,000
Weighted-average useful life of acquired intangible assets			10 years
Pro forma effect of business acquisitions			The impact of the acquisition of ULSP on the Company's revenues and net income since the acquisition date for the six months ended June 28, 2014 was immaterial.