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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Nonhedging Designation (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Derivatives not designated as hedging instruments | Foreign currency exchange contracts | Interest and other income, net |  |  |  |
Net (losses) gains on derivative instruments |  |  |  |
Amount of (loss) gain recognized in income on derivatives | $ (4,439) | $ 141 | $ (9,467) | $ 458

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