Fair Value Measurements (Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Dec. 29, 2013
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Of Contingent Consideration Measured On Recurring Basis	$ (3,430)	$ (4,926)
Foreign exchange derivative liabilities, net	(203)	(396)
Marketable securities	1,327	1,319
Foreign exchange derivative assets, net	(36)	(293)
Quoted Prices In Active Markets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Of Contingent Consideration Measured On Recurring Basis	0	0
Foreign exchange derivative liabilities, net	0	0
Marketable securities	1,327	1,319
Foreign exchange derivative assets, net	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Of Contingent Consideration Measured On Recurring Basis	0	0
Foreign exchange derivative liabilities, net	(203)	(396)
Marketable securities	0	0
Foreign exchange derivative assets, net	(36)	(293)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Of Contingent Consideration Measured On Recurring Basis	(3,430)	(4,926)
Foreign exchange derivative liabilities, net	0	0
Marketable securities	0	0
Foreign exchange derivative assets, net	$ 0	$ 0