LONG-TERM DEBT: - Schedule of debt (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Long-term debt
Total long-term debt	$ 233,293	$ 230,612
Less current installments	1,583	39,819
Less deferred debt financing costs	3,873	1,552
Long-term debt, excluding current installments and deferred debt financing costs	227,837	189,241
Term loan credit agreement
Long-term debt
Total long-term debt	0	155,000
Revolving credit borrowings
Long-term debt
Total long-term debt	230,000	70,000
Other debt and long-term liabilities
Long-term debt
Total long-term debt	$ 3,293	$ 5,612