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FINANCING ARRANGEMENTS: (Details) (USD $) | 3 Months Ended |  | 9 Months Ended | 12 Months Ended |  |  | 1 Months Ended | 9 Months Ended |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2011 | Mar. 31, 2012 Senior term notes | Jun. 30, 2011 Senior term notes | Mar. 31, 2012 Private Shelf Agreement | Jun. 30, 2011 Private Shelf Agreement | Jul. 31, 2009 Convertible senior notes | Mar. 31, 2012 Convertible senior notes Y | Mar. 31, 2011 Convertible senior notes | Jun. 30, 2011 Convertible senior notes | Mar. 31, 2012 Revolving credit facility | Jun. 30, 2011 Revolving credit facility | Sep. 30, 2011 Equipment and leasehold notes payable Y | Mar. 31, 2012 Equipment and leasehold notes payable | Jun. 30, 2011 Equipment and leasehold notes payable | Sep. 29, 2011 Equipment and leasehold notes payable | Mar. 31, 2012 Other notes payable | Jun. 30, 2011 Other notes payable
Total debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of period | $ 292,881,000 | $ 304,015,000 | $ 313,411,000 | $ 404,145,000 | $ 439,669,000 | $ 440,029,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term debt and capital lease obligations | (1,811,000) | (12,321,000) | (9,669,000) | (2,937,000) | (39,258,000) | (3,334,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortized debt discount | 1,234,000 | 1,208,000 | 1,183,000 | 1,134,000 | 1,110,000 | 1,086,000 |  |  |  |  |  |  | 3,625,000 | 3,329,000 |  |  |  |  |  |  |  |  |
Other | 3,000 | (21,000) | (910,000) | 1,949,000 | 2,624,000 | 1,888,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the end of period | 292,307,000 | 292,881,000 | 304,015,000 | 404,291,000 | 404,145,000 | 439,669,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate percentage, minimum |  |  |  |  |  |  |  | 6.69% | 6.69% |  |  |  |  |  |  |  |  |  | 4.90% | 8.80% |  | 5.75% | 5.75%
Interest rate percentage, maximum |  |  |  |  |  |  |  | 8.50% | 8.50% |  |  |  |  |  |  |  |  |  | 8.78% | 9.14% |  | 8.00% | 8.00%
Interest rate percentage |  |  |  |  |  |  |  |  |  |  |  | 5.00% | 5.00% |  | 5.00% |  |  |  |  |  | 4.90% |  |
Net carrying amount of long-term debt | 292,307,000 |  |  |  |  |  | 313,411,000 | 115,714,000 | 133,571,000 | 115,700,000 | 133,600,000 |  | 159,873,000 |  | 156,248,000 |  |  |  | 16,312,000 | 22,273,000 |  | 408,000 | 1,319,000
Less current portion | (28,877,000) |  |  |  |  |  | (32,252,000) |  |  | (22,100,000) | (22,100,000) |  |  |  |  |  |  |  |  |  |  |  |
Long-term portion | 263,430,000 |  |  |  |  |  | 281,159,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of long-term debt |  |  |  |  |  |  |  |  |  |  |  | 172,500,000 | 172,500,000 |  | 172,500,000 |  |  |  |  |  | 20,500,000 |  |
Long-term debt, additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt conversion ratio |  |  |  |  |  |  |  |  |  |  |  | 64.6726 | 65.0715 |  |  |  |  |  |  |  |  |  |
Principal amount applied to conversion ratio |  |  |  |  |  |  |  |  |  |  |  | 1,000 | 1,000 |  |  |  |  |  |  |  |  |  |
Long-term debt conversion price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 15.46 | $ 15.37 |  |  |  |  |  |  |  |  |  |
Convertible long-term debt amount allocated to equity |  |  |  |  |  |  |  |  |  |  |  | 24,700,000 |  |  |  |  |  |  |  |  |  |  |
Fair value of long-term debt |  |  |  |  |  |  |  |  |  |  |  | 147,800,000 |  |  |  |  |  |  |  |  |  |  |
Effective interest rate on the convertible debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 8.90% |  |  |  |  |  |  |  |  |  |  |
Debt discount amortization period (in years) |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |
Unamortized debt discount |  |  |  |  |  |  |  |  |  |  |  | (24,700,000) | (12,627,000) |  | (16,252,000) |  |  |  |  |  |  |  |
Interest cost related to contractual interest coupon |  |  |  |  |  |  |  |  |  |  |  |  | 6,469,000 | 6,469,000 |  |  |  |  |  |  |  |  |
Interest cost related to amortization of the discount | 1,234,000 | 1,208,000 | 1,183,000 | 1,134,000 | 1,110,000 | 1,086,000 |  |  |  |  |  |  | 3,625,000 | 3,329,000 |  |  |  |  |  |  |  |  |
Total interest cost |  |  |  |  |  |  |  |  |  |  |  |  | 10,094,000 | 9,798,000 |  |  |  |  |  |  |  |  |
Outstanding standby letters of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 26,100,000 | 26,000,000 |  |  |  |  |  |
Revolving credit facility remaining borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 373,900,000 | $ 374,000,000 |  |  |  |  |  |
Debt instrument term (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |
Capital lease amortization rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.20% |  |  |  |  |

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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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- Definition Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section H Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt and payment of capital lease obligations. + References No definition available. + Details
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