Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

v3.10.0.1
Fair Value of Financial Instruments (Details) - Recurring [Member] - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 30, 2017
Assets    
Assets measured at fair value $ 120  
Liabilities    
Liabilities measured at fair value 34,702 $ 33,882
Forward Foreign Exchange Contracts [Member]    
Assets    
Assets measured at fair value 120  
Liabilities    
Liabilities measured at fair value 167  
Level 2 [Member]    
Assets    
Assets measured at fair value 120  
Liabilities    
Liabilities measured at fair value 167  
Level 2 [Member] | Forward Foreign Exchange Contracts [Member]    
Assets    
Assets measured at fair value 120  
Liabilities    
Liabilities measured at fair value 167  
Level 3 [Member]    
Liabilities    
Liabilities measured at fair value 34,535 33,882
Contingent Consideration [Member]    
Liabilities    
Liabilities measured at fair value 34,535 33,882
Contingent Consideration [Member] | Level 3 [Member]    
Liabilities    
Liabilities measured at fair value $ 34,535 $ 33,882