Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Details Textual)

v3.10.0.1
Derivative Financial Instruments (Details Textual)
€ in Thousands, $ in Thousands
 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 (€)
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Interest expense $ 4,622 $ 1,121 $ 9,256 $ 2,710  
Purchase amount of forward foreign exchange currency contract | €         € 370,000
Forward Foreign Exchange Contracts [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Derivative instrument, notional amount 6,800   $ 6,800    
Derivative expiration month and year     2019-02    
Cash Flow Hedging [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Interest expense     $ 9,256    
Cash Flow Hedging [Member] | Interest Rate Swap Contract [Member] | Derivatives Designated as Hedging Instruments [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Derivative instrument, notional amount $ 200,000   $ 200,000    
Derivative contract effective date Aug. 02, 2018        
Derivative contract expire date Apr. 03, 2023