EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
EMPLOYEE BENEFIT PLANS [Abstract]
Company match	50.00%
Portion of employee compensation matched under 401(k)	6.00%
Non-elective company contribution as percentage of employee salary	3.00%
Vesting of matching contributions	100.00%
Company contributions	$ 4.5	$ 4.2	$ 4.7