LONG-TERM DEBT (Details) (USD $)	12 Months Ended							1 Months Ended	12 Months Ended					1 Months Ended		12 Months Ended						1 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Revolving credit facility	Jun. 30, 2011 Term loan facility	Jun. 30, 2010 Term loan facility	Jun. 30, 2011 Other, generally unsecured	Jun. 30, 2010 Other, generally unsecured	Apr. 30, 2011 New Credit Facility	Jun. 30, 2011 New Credit Facility Leverage ratio greater than 2.5	Jun. 30, 2011 New Credit Facility Leverage ratio between 2.0 and 2.5	Jun. 30, 2011 New Credit Facility Leverage ratio between 1.5 and 2.0	Jun. 30, 2011 New Credit Facility Leverage ratio between 1.0 and 1.5	Jun. 30, 2011 New Credit Facility Leverage ratio below 1.0	Apr. 30, 2011 New Credit Facility, term loan	Apr. 15, 2011 New Credit Facility, term loan	Jun. 30, 2011 New Credit Facility, term loan Quarterly principal reduction through March 2013	Jun. 30, 2011 New Credit Facility, term loan Quarterly principal reduction from June 2013 through March 2014	Jun. 30, 2011 New Credit Facility, term loan Quarterly principal reduction from June 2014 through May 2016	Jun. 30, 2011 New Credit Facility, term loan Principal reduction May 2016	Jun. 30, 2011 New Credit Facility, revolving credit	Apr. 15, 2011 New Credit Facility, revolving credit	Dec. 31, 2008 Interest rate swap agreement maturing on September 26, 2012	Jun. 30, 2011 Interest rate swap agreement maturing on May 13, 2016
Components of long-term debt
Long-term debt	$ 515,403,000	$ 173,793,000	$ 219,000,000	$ 296,250,000	$ 173,750,000	$ 153,000	$ 43,000
Less current maturities	(15,153,000)	(42,543,000)
Long-term debt, net of current maturities	500,250,000	131,250,000
Overall capacity of senior secured credit facility								700,000,000						300,000,000
Maximum borrowing capacity																					400,000,000
Total undrawn revolver capacity																				181,000,000
Term of facility (in years)															5						5
Sublimit under the revolving credit facility related to standby letters of credit																					50,000,000
Sublimit under the revolving credit facility related to swingline loans																					10,000,000
Sublimit under the revolving credit facility related to multicurrency borrowings																					150,000,000
Variable rate basis								LIBOR	LIBOR	LIBOR	LIBOR	LIBOR	LIBOR
Debt, margin on LIBOR rate									2.00%	1.75%	1.50%	1.25%	1.00%
Leverage ratio									2.5				1.0
Leverage ratio, low end of range										2.0	1.5	1.0
Leverage ratio, high end of range										2.5	2.0	1.5
Variable interest rate description before hedging of debt	LIBOR																					LIBOR	LIBOR
Notional amount of interest rate swap	296,300,000																					218,800,000	165,000,000
Effective interest rate for hedged variable rate debt (as a percent)																						1.89%	2.09%
Effective interest rate after giving effect to the floating-to-fixed interest rate swaps (as a percent)			2.29%	3.82%
Principal reduction amount																$ 3,750,000	$ 5,625,000	$ 7,500,000	$ 187,500,000
Quarterly principal reductions, percentage of original principal amount (as a percent)																1.25%	1.875%	2.50%