FINANCING ARRANGEMENTS (Details) (USD $)	3 Months Ended	12 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended		0 Months Ended			1 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Senior term notes outstanding under Private Shelf Agreement	Jun. 30, 2012 Senior term notes outstanding under Private Shelf Agreement	Jun. 30, 2013 Private Shelf Agreement	Jul. 31, 2009 Convertible senior notes	Jun. 30, 2013 Convertible senior notes	Jun. 30, 2012 Convertible senior notes	Jun. 11, 2013 Revolving credit facility	Jun. 30, 2013 Revolving credit facility	Jun. 30, 2012 Revolving credit facility	Sep. 30, 2011 Equipment and leasehold notes payable	Jun. 30, 2013 Equipment and leasehold notes payable	Jun. 30, 2012 Equipment and leasehold notes payable	Jun. 30, 2013 Other notes payable	Jun. 30, 2012 Other notes payable
Long-term debt
Interest rate percentage, minimum				6.69%	6.69%									4.90%	4.90%	5.75%	5.75%
Interest rate percentage, maximum				8.50%	8.50%									8.75%	8.75%	8.00%	8.00%
Interest rate percentage							5.00%	5.00%	5.00%				4.90%
Net carrying amount of long-term debt	$ 174,770,000	$ 174,770,000	$ 287,674,000		$ 111,429,000			$ 166,454,000	$ 161,134,000					$ 8,316,000	$ 14,780,000		$ 331,000
Less current portion	(173,515,000)	(173,515,000)	(28,937,000)
Long-term portion	1,255,000	1,255,000	258,737,000
Aggregate maturities of long-term debt, including capital lease obligations
Capital lease obligations	8,300,000	8,300,000
Fiscal year, 2014	173,515,000	173,515,000
Fiscal year, 2015	1,253,000	1,253,000
Fiscal year, 2016	2,000	2,000
Prepayment of debt						89,300,000
Make-whole payments related to repayment of long-term debt	6,700,000	10,600,000				10,600,000
Long-term debt, additional disclosures
Principal amount of long-term debt							172,500,000	172,500,000	172,500,000					8,300,000
Long-term debt conversion ratio								0.0654357
Long-term debt conversion price (in dollars per share)								$ 15.28
Convertible long-term debt amount allocated to equity							24,700,000
Unamortized debt discount							(24,700,000)	(6,046,000)	(11,366,000)
Debt discount amortization period							5 years
Effective interest rate on the convertible debt (as a percent)							8.90%
Debt instrument term													3 years
Interest expense related to contractual interest coupon								8,625,000	8,625,000
Interest cost related to amortization of the discount								5,320,000	4,886,000
Total interest cost								13,945,000	13,511,000
Revolving credit facility maximum borrowing capacity										400,000,000
Variable interest rate basis										LIBOR
Maximum borrowing capacity, optional expansion										200,000,000
Threshold default of other debt to trigger event of default										10,000,000
Revolving credit facility outstanding amount											0	0
Outstanding standby letters of credit											2,200,000	26,100,000
Revolving credit facility remaining borrowing capacity											397,800,000	373,900,000
Restricted cash used to collateralize insurance reserves	27,500,000	27,500,000	4,500,000								24,500,000
Capital lease amortization rate (as a percent)													9.20%
Gain (loss) recorded on refinancing of capital leases													$ 0