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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)
6 Months Ended
Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of gross notional amounts of foreign currency forward contracts
The following table shows the gross notional amounts of foreign currency forward contracts:
 
September 30, 2018
 
March 31, 2018
Forward contracts to sell foreign currencies
$
345,710

 
$
67,580

Forward contracts to purchase foreign currencies
10,329

 
4,359