FAIR VALUE OF FINANCIAL INSTRUMENTS: (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Fair value of assets and liabilities
Other current assets	$ 37,897	$ 34,975
Fair value measurements on recurring basis
Fair value of assets and liabilities
Other current assets	12,532	14,174
Total assets	12,532	14,174
Other accrued expenses	115
Other noncurrent liabilities		199
Total liabilities	115	199
Fair value measurements on recurring basis | Level 1
Fair value of assets and liabilities
Other current assets	12,532	14,174
Total assets	12,532	14,174
Fair value measurements on recurring basis | Level 2
Fair value of assets and liabilities
Other accrued expenses	115
Other noncurrent liabilities		199
Total liabilities	$ 115	$ 199