FOREIGN CURRENCY DERIVATIVES (Details 5) $ in Thousands, $ in Thousands	Dec. 31, 2018 USD ($)	Dec. 31, 2018 MXN ($)	Mar. 31, 2018 MXN ($)
Foreign currency swap contract [Member]
Derivative [Line Items]
Notional amount of contracts	$ 11,485	$ 228,110	$ 31,800