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Fair Value and Derivative Instruments - Foreign Currency Forward Contracts (Details) - 6 months ended Jun. 27, 2020 $ in Thousands, $ in Thousands	USD ($)	TWD ($)
Derivative [Line Items]
Amount expected to be reclassified	$ 200
Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount	9,588
Buy | Euro Dollar | Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount	1,996	$ 1,897
Sell | Japanese Yen | Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount	13,766	1,475,099
Sell | Korean Won | Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount	$ 2,182	$ 2,613,516

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

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