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Derivatives and Hedging - Gains (Losses) Associated with Fair Value and Cash Flow Hedges (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Derivative Instruments, Gain (Loss) |  |  |  |
After-Tax Amount of Gain (Loss) Reclassified from AOCI into Earnings | $ (550) | $ (1,784) | $ (1,920) | $ (3,091)
Foreign currency contracts | Total cost of revenue |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
After-Tax Amount of Gain (Loss) Reclassified from AOCI into Earnings | (288) | (1,522) | (1,134) | (2,305)
Interest rate contracts | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
After-Tax Amount of Gain (Loss) Reclassified from AOCI into Earnings | $ (262) | $ (262) | $ (786) | $ (786)

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- Definition Amount after tax of the effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References No definition available. + Details
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