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Financial Instruments - Balance Sheet Location (Details) - Fair Value, Measurements, Recurring [Member] - Level 2 [Member] - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Assets [Abstract] |  |
Foreign currency cash flow hedges | $ 2,325 | $ 2,892
Liabilities [Abstract] |  |
Foreign currency cash flow hedges | $ 2,057 | $ 476

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