Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments and Risk Management (Balance Sheet Classification and Fair Value of Derivative Instruments) (Details)

v3.21.1
Financial Instruments and Risk Management (Balance Sheet Classification and Fair Value of Derivative Instruments) (Details) - Forward Contracts [Member] - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Not Designated as Hedging Instrument [Member] | Prepaid Expenses And Other Current Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets $ 1,759 $ 1,650 $ 4,449
Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities 1,793 2,268 978
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid Expenses And Other Current Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets 2,438 947 18,945
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets 6,159 1,126 10,520
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities 4,908 7,573 231
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Long Term Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities $ 2,337 $ 6,590 $ 0