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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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