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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
Jun. 29, 2019
Dec. 29, 2018
Assets:    
Money market funds and time deposits $ 5,006 $ 6,902
Banker's acceptance drafts 7,706 7,976
2015 Swap Agreement 42 148
Forward currency-exchange contract(s) 11 20
Liabilities:    
2018 Swap Agreement 829 352
Forward currency-exchange contracts 32 81
Level 1    
Assets:    
Money market funds and time deposits 5,006 6,902
Banker's acceptance drafts 0 0
2015 Swap Agreement 0 0
Forward currency-exchange contract(s) 0 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 7,706 7,976
2015 Swap Agreement 42 148
Forward currency-exchange contract(s) 11 20
Liabilities:    
2018 Swap Agreement 829 352
Forward currency-exchange contracts 32 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 0
Liabilities:    
2018 Swap Agreement 0 0
Forward currency-exchange contracts $ 0 $ 0