FOREIGN CURRENCY DERIVATIVES FOREIGN CURRENCY DERIVATIVES (Details 3) $ in Thousands, $ in Thousands	Mar. 31, 2018 USD ($)	Mar. 31, 2018 EUR (€)	Mar. 31, 2018 MXN ($)	Mar. 31, 2018 GBP (£)	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 GBP (£)
Option contracts
Derivative [Line Items]
Notional amount of cash flow hedge		€ 77,800,000.0		£ 23,700,000.0	€ 73,500,000.0	£ 23,900,000.0
Forward contracts
Derivative [Line Items]
Notional amount of cash flow hedge		€ 16,700,000.0		£ 3,700,000.0	€ 11,200,000.0	£ 3,300,000.0
Foreign currency swap contract
Derivative [Line Items]
Notional amount of cash flow hedge	$ 1,599		$ 31,830