FINANCING ARRANGEMENTS: (Details) (USD $)			9 Months Ended	12 Months Ended	1 Months Ended	9 Months Ended					9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2013	Jun. 30, 2012	Mar. 31, 2013 Senior term notes outstanding under Private Shelf Agreement	Jun. 30, 2012 Senior term notes outstanding under Private Shelf Agreement	Jul. 31, 2009 Convertible senior notes	Mar. 31, 2013 Convertible senior notes	Mar. 31, 2012 Convertible senior notes	Jun. 30, 2012 Convertible senior notes	Mar. 31, 2013 Revolving credit facility	Jun. 30, 2012 Revolving credit facility	Mar. 31, 2013 Equipment and leasehold notes payable	Jun. 30, 2012 Equipment and leasehold notes payable	Mar. 31, 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%
Net carrying amount of long-term debt	$ 268,637,000	$ 287,674,000	$ 93,571,000	$ 111,429,000		$ 165,081,000		$ 161,134,000			$ 9,985,000	$ 14,780,000		$ 331,000
Less current portion	(29,044,000)	(28,937,000)	22,100,000	22,100,000
Long-term portion	239,593,000	258,737,000
Long-term debt, additional disclosures
Principal amount of long-term debt					172,500,000
Long-term debt conversion ratio					0.0646726	0.0653632
Long-term debt conversion price (in dollars per share)					$ 15.46	$ 15.30
Interest expense related to contractual interest coupon						6,500,000	6,500,000
Interest cost related to amortization of the discount						3,900,000	3,600,000
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									$ 24,500,000