Acquisitions (Details) In Thousands, unless otherwise specified	9 Months Ended			9 Months Ended	12 Months Ended
	Sep. 29, 2012 USD ($)	Sep. 28, 2013 ComputerLinks [Member] USD ($)	Sep. 28, 2013 ComputerLinks [Member] EUR (€)	Sep. 28, 2013 Series of Individually Immaterial Business Acquisitions [Member] USD ($) Acquisitions	Dec. 31, 2012 Series of Individually Immaterial Business Acquisitions [Member] USD ($) Acquisitions
Business Acquisition [Line Items]
Number of Businesses Acquired				2	7
Business Acquisition, Purchase Price Allocation [Abstract]
Business Acquisition, Cash Consideration Paid		$ 317,000	€ 230,000	$ 43,962	$ 289,782
Business Acquisition, Contingent Consideration				570	10,390
Payments to acquire additional interest in majority-owned subsidiary	$ 2,526