STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
STOCKHOLDERS' EQUITY [Abstract]
Authorized number of shares under stock repurchase program (in shares)	500,000
Common stock repurchased during the period (in shares)	156,087	125,605
Average cost of share repurchased (in dollars per share)	$ 77.04	$ 77.88
Common stock repurchased during the period	$ 12,000	$ 9,800
Shares repurchased to satisfy tax withholding obligation (in shares)	40,092	57,725
Average cost for shares repurchased to satisfy tax withholding obligation (in dollars per share)	$ 96.23
Value of shares repurchased to satisfy tax withholding obligation	$ 3,900	$ 4,400