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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Mar. 31, 2019
Derivative [Line Items] |  |  |  |  |
Forward contracts to sell foreign currencies | $ 211,668 |  | $ 211,668 |  | $ 116,590
Forward contracts to purchase foreign currencies | 40,512 |  | 40,512 |  | $ 87,793
Derivative instrument not designated as hedging instruments, gain (loss), net | 2,210 | $ (247) | (1,087) | $ 2,157 |
Cash Flow Hedging | Foreign currency forward contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, notional amount | $ 115,641 |  | $ 115,641 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Represents the notional amount of derivative instruments to buy. + References No definition available. + Details
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- Definition Represents the notional amount of derivative instruments to sell. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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