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Financial Instruments - Balance Sheet Location (Details) - Fair Value, Measurements, Recurring [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Assets [Abstract]    
Foreign currency cash flow hedges - asset $ 1,701 $ 2,325
Liabilities [Abstract]    
Foreign currency cash flow hedges - liability $ 166 $ 2,057