FOREIGN CURRENCY DERIVATIVES (Details) $ in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 MXN ($)	Mar. 31, 2018 MXN ($)	Dec. 31, 2017 financial_institution
Derivative [Line Items]
Number of financial institutions company has International Swap and Derivatives Association agreements | financial_institution								4
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		$ (813)	$ 2,302	$ (4,769)	$ 4,647
Foreign currency swap contract [Member]
Derivative [Line Items]
Notional amount of contracts						$ 0	$ 31,800
Interest Rate Swap [Member]
Derivative [Line Items]
Term of derivative contract	4 years
Notional amount of contracts	$ 831,000
Derivative, Fixed Interest Rate	2.78%
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax				$ 980
Cash flow hedges [Member] | Options [Member] | Minimum [Member]
Derivative [Line Items]
Term of derivative contract				6 months
Cash flow hedges [Member] | Options [Member] | Maximum [Member]
Derivative [Line Items]
Term of derivative contract				11 months
Cash flow hedges [Member] | Forwards [Member]
Derivative [Line Items]
Term of derivative contract				3 months