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DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) on Derivatives (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 27, 2020 | Jun. 29, 2019 | Jun. 27, 2020 | Jun. 29, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivatives recognized in earnings | $ 709 | $ 714 | $ 1,612 | $ 1,903
Commodity forward contracts | Product cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivatives recognized in earnings | 0 | (96) | 0 | (96)
Foreign currency forward contracts | Other income (expenses) |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivatives recognized in earnings | (93) | 152 | 30 | 704
Foreign currency forward contracts | Product sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivatives recognized in earnings | 99 | 0 | 152 | 0
Interest rate hedge amortization | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivatives recognized in earnings | (16) | (16) | (32) | (32)
Cross currency swap contracts | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivatives recognized in earnings | $ 719 | $ 674 | $ 1,462 | $ 1,327

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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