Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 29, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill	$ 353,469	$ 350,350
Pro forma effect of business acquisitions	The impact of the acquisition of ULSP on the Company's net income since the acquisition date for the three months ended March 29, 2014 was immaterial.
ULSP [Member]
Business Acquisition [Line Items]
Accounts receivable and other current assets acquired	448
Property, plant and equipment acquired	50
Intangible assets acquired	657
Goodwill	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
Weighted-average useful life of acquired intangible assets	10 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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