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Derivative Financial Instruments and Fair Value Measurements (Schedule of Fair Value Measurements) (Details) - USD ($)
$ in Thousands
Sep. 29, 2018
Jun. 30, 2018
Dec. 30, 2017
Sep. 30, 2017
Jul. 01, 2017
Dec. 31, 2016
Not Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Contingent Consideration $ (4,573) $ (4,548) $ (11,320) $ (11,236) $ (11,153) $ (15,279)
Fair Value, Measurements, Recurring [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Inventories Carried At Market 1,700   3,838      
Contingent Consideration (4,573)   (11,320)      
Embedded Derivative 2,532   2,690      
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset Notional Amount 561   (1,060)      
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash Flow Hedge Derivative Instrument Assets At Fair Value 0   (435)      
Fair Value, Measurements, Recurring [Member] | Short [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 1,109   738      
Unrealized Derivative Liability (1,485)   (240)      
Fair Value, Measurements, Recurring [Member] | Long [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 4   0      
Unrealized Derivative Liability (1)   (4)      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Inventories Carried At Market 0   0      
Contingent Consideration 0   0      
Embedded Derivative 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset Notional Amount 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash Flow Hedge Derivative Instrument Assets At Fair Value 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Short [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 0   0      
Unrealized Derivative Liability (387)   (35)      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Long [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 0   0      
Unrealized Derivative Liability 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Inventories Carried At Market 1,700   3,838      
Contingent Consideration 0   0      
Embedded Derivative 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset Notional Amount 561   (1,060)      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash Flow Hedge Derivative Instrument Assets At Fair Value 0   (435)      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Short [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 1,109   738      
Unrealized Derivative Liability (1,098)   (205)      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Long [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 4   0      
Unrealized Derivative Liability (1)   (4)      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Inventories Carried At Market 0   0      
Contingent Consideration (4,573)   (11,320)      
Embedded Derivative 2,532   2,690      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset Notional Amount 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash Flow Hedge Derivative Instrument Assets At Fair Value 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Short [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 0   0      
Unrealized Derivative Liability 0   0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Long [Member] | Future And Forward Contracts [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Unrealized Derivative Asset 0   0      
Unrealized Derivative Liability $ 0   $ 0