SHARE-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Compensation Expense [Abstract]
Total share-based compensation expense	$ 1.5	$ 1.2	$ 4.2	$ 3.4
401 (k) Profit Sharing Plan [Abstract]
Period over which employer contribution is vested			4 years
Contribution to profit sharing plan	$ 0.4	$ 0.4	$ 1.1	$ 1.0
Restricted Stock [Member]
Number of Shares [Rollforward]
Nonvested (in shares)			176,514
Granted (in shares)			125,357
Vested (in shares)			(95,321)
Forfeited (in shares)			(2,321)
Nonvested (in shares)	204,229		204,229
Weighted Average Grant-date Fair Value [Rollforward]
Nonvested (in dollars per share)			$ 52.75
Granted (in dollars per share)			81.76
Vested (in dollars per share)			48.79
Forfeited (in dollars per share)			64.06
Nonvested (in dollars per share)	$ 72.28		$ 72.28
Compensation Expense [Abstract]
Unrecognized compensation expense	$ 11.5		$ 11.5
Unrecognized compensation expense, period for recognition			54 months
2008 Director LTIP [Member] | Restricted Stock [Member]
Number of Shares [Rollforward]
Granted (in shares)			6,383	10,058
2012 Employee LTIP [Member] | Restricted Stock [Member]
Number of Shares [Rollforward]
Granted (in shares)			118,974	78,165