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	Jul. 01, 2012	Jan. 01, 2012
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	$ (7,315)	$ (20,298)
Foreign exchange derivative liabilities, net	(41)	(213)
Marketable securities	(1,102)	(1,105)
Foreign exchange derivative assets, net	4,050
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	(1,102)	(1,105)
Foreign exchange derivative assets, net	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	(41)	(213)
Marketable securities	0	0
Foreign exchange derivative assets, net	4,050
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	(7,315)	(20,298)
Foreign exchange derivative liabilities, net	0	0
Marketable securities	0	0
Foreign exchange derivative assets, net	$ 0