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, 2019 |
Dec. 31, 2018 |
---|---|---|
Prepaid Expenses and Other Current Assets [Member] | ||
Derivatives, Fair Value [Line Items] | ||
Derivative Asset | $ 1,300 | $ 187 |
Other Assets [Member] | ||
Derivatives, Fair Value [Line Items] | ||
Derivative Asset | 279 | 545 |
Derivative Financial Instruments, Assets [Member] | ||
Derivatives, Fair Value [Line Items] | ||
Derivative Asset | $ 1,579 | |
Derivative Financial Instruments, Liabilities [Member] | ||
Derivatives, Fair Value [Line Items] | ||
Derivative Liability | $ 732 |