Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Details 1)

v3.10.0.1
Derivative Financial Instruments (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 29, 2018
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Unrealized gain on interest rate swap $ 119 $ 119
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Swap Contract [Member]    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Unrealized gain on interest rate swap   119
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Swap Contract [Member] | Interest Expense, Net [Member]    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Amount of Gain or (Loss) Reclassified from AOCI into Earnings (Effective Portion)   (254)
Derivatives Not Designated as Hedging Instruments [Member] | Forward Foreign Exchange Contracts [Member] | Foreign Currency Transaction Gain Loss, Net [Member]    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Amount of Gain or (Loss) Recognized in Earnings on Derivatives   $ (3,573)