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Fair Value Measurements and Fair Value of Financial Instruments - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring - USD ($)
$ in Thousands
Sep. 28, 2019
Dec. 29, 2018
Assets:    
Money market funds and time deposits $ 5,657 $ 6,902
Banker's acceptance drafts 5,824 7,976
2015 Swap Agreement 26 148
Forward currency-exchange contract(s)   20
Liabilities:    
2018 Swap Agreement 894 352
Forward currency-exchange contracts 121 81
Level 1    
Assets:    
Money market funds and time deposits 5,657 6,902
Banker's acceptance drafts 0 0
2015 Swap Agreement 0 0
Forward currency-exchange contract(s)   0
Liabilities:    
2018 Swap Agreement 0 0
Forward currency-exchange contracts 0 0
Level 2    
Assets:    
Money market funds and time deposits 0 0
Banker's acceptance drafts 5,824 7,976
2015 Swap Agreement 26 148
Forward currency-exchange contract(s)   20
Liabilities:    
2018 Swap Agreement 894 352
Forward currency-exchange contracts 121 81
Level 3    
Assets:    
Money market funds and time deposits 0 0
Banker's acceptance drafts 0 0
2015 Swap Agreement 0 0
Forward currency-exchange contract(s)   0
Liabilities:    
2018 Swap Agreement 0 0
Forward currency-exchange contracts $ 0 $ 0