OTHER ACCRUED EXPENSES: (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Other Accrued Expenses [Abstract].
Liabilities of non-qualified retirement plan (see Note 6 - Other Current and Noncurrent Assets)	$ 14,970	$ 13,551
Other accrued expenses	25,946	26,073
Other accrued expenses	$ 40,916	$ 39,624

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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