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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. 30, 2013
Dec. 30, 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 $ (3,715) $ (3,017)
Foreign exchange derivative liabilities, net (84) (294)
Marketable securities (1,139) (1,149)
Foreign exchange derivative assets, net 483 274
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 (1,139) (1,149)
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 (84) (294)
Marketable securities 0 0
Foreign exchange derivative assets, net 483 274
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 (3,715) (3,017)
Foreign exchange derivative liabilities, net 0 0
Marketable securities 0 0
Foreign exchange derivative assets, net $ 0 $ 0