XML 49 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Derivative Financial Instruments and Fair Value Measurements (Foreign Forward Currency Contracts Narrative) (Details)
$ in Thousands, € in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 29, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 29, 2018
EUR (€)
Sep. 29, 2018
USD ($)
Derivative [Line Items]            
Unrealized loss (gain) on derivative instrument $ (2,110) $ (754) $ (867) $ 475    
Not Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member]            
Derivative [Line Items]            
Derivative Instruments, Gain (Loss) Recognized in Income, Net 200 300 1,600 (2,600)    
Not Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | EUR            
Derivative [Line Items]            
Derivative, Notional Amount         € 17.0 $ 20,500
Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member]            
Derivative [Line Items]            
Unrealized loss (gain) on derivative instrument 0 200 500 2,300    
Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Reclassification Out Of Accumulated Other Comprehensive Income Member            
Derivative [Line Items]            
Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net $ 0 $ 200 $ 100 1,000    
Gain Loss On Components Excluded From Assessment Of Foreign Currency Cash Flow Hedge Effectiveness       $ 900