STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Aug. 15, 2017
STOCKHOLDERS' EQUITY [Abstract]
Authorized number of shares under stock repurchase program (in shares)			500,000
Common stock repurchased during the period (in shares)	0	656,962
Average cost of share repurchased (in dollars per share)		$ 40.81
Common stock repurchased during the period		$ 26.8
Shares repurchased to satisfy tax withholding obligation (in shares)	57,725	59,472
Value of Shares repurchased to satisfy tax withholding obligation	$ 4.4	$ 2.6