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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 |  |  |  |  |

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