INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2010	Jan. 31, 2009	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
INCOME TAXES
Effective income tax rate (as a percent)			37.20%	36.50%	37.20%	30.80%
Tax paid, excluding interest, relating to federal income tax returns examination for the year 2003 through 2005		$ 3.4
Interest paid / (refund received) relating to federal income tax returns examination for the year 2003 through 2005	(0.6)	1.2
Tax refund received, including interest, relating to federal income tax returns examination for the year 2003 through 2005	2.3
If successful in defending the Company's position, reduction to unrecognized tax benefits					3.7
If the IRS were to prevail in full, additional income tax provision					7.1
Accrual for uncertain tax positions			10.4		10.4
Accrued interest and penalties related to unrecognized tax benefit			1.6		1.6
Decrease in unrecognized tax benefits, is reasonably possible, estimated range, maximum			$ 0.1		$ 0.1