Derivative Financial Instruments Derivative Instruments and Hedging Activities - FV of Derivative Instruments Included Within Consolidated Balance Sheet (Details) - Foreign Exchange Forward [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 1,090	$ 2,366
Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	1,300
Derivative Financial Instruments, Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		2,366
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	(6)	0
Other Assets
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 216	$ 0