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Derivatives, Hedges, Financial Instruments and Carbon Credits (Details 3) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
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The estimated fair value and carrying value of long-term debt |  |
Long-term Debt, Percentage Bearing Variable Interest, Carrying Value | $ 48,125 |
Long-term Debt, Percentage Bearing Fixed Interest, Carrying Value | 24,063 |
Long-term Debt, Estimated Fair Value | 79,399 | 74,385
Long-term Debt, Carrying Value | 79,460 | 95,392
Secured Term Loan due 2012 [Member] |  |
The estimated fair value and carrying value of long-term debt |  |
Long-term Debt, Percentage Bearing Variable Interest, Estimated Fair Value | 72,188 | 26,721
Long-term Debt, Percentage Bearing Variable Interest, Carrying Value | 72,188 | 48,773
Long-term Debt, Carrying Value | 72,188 | 48,773
Working Capital Revolver Loan due 2012 [Member] |  |
The estimated fair value and carrying value of long-term debt |  |
Long-term Debt, Percentage Bearing Variable Interest, Estimated Fair Value | 0 | 0
Long-term Debt, Percentage Bearing Variable Interest, Carrying Value | 0 | 0
Long-term Debt, Carrying Value | 0 | 0
Other debt [Member] |  |
The estimated fair value and carrying value of long-term debt |  |
Long-term Debt, Percentage Bearing Variable Interest, Estimated Fair Value | 0 | 2,437
Long-term Debt, Percentage Bearing Variable Interest, Carrying Value | 0 | 2,437
Long-term Debt, Carrying Value | 7,272 | 19,719
5.5% Convertible Senior Subordinated Notes due 2012 [Member] |  |
The estimated fair value and carrying value of long-term debt |  |
Long-term Debt, Percentage Bearing Fixed Interest, Estimated Fair Value | 0 | 27,976
Long-term Debt, Percentage Bearing Fixed Interest, Carrying Value | 0 | 26,900
Long-term Debt, Carrying Value | 0 | 26,900
Other bank debt and equipment financing [Member] |  |
The estimated fair value and carrying value of long-term debt |  |
Long-term Debt, Percentage Bearing Fixed Interest, Estimated Fair Value | 7,211 | 17,251
Long-term Debt, Percentage Bearing Fixed Interest, Carrying Value | $ 7,272 | $ 17,282

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- Definition This element represents the aggregate total of the portion of long-term debt valued at fair value by the entity used in connection with the fair value disclosures required in the footnote disclosures of the financial statements. + References No definition available. + Details
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- Definition This element represents the portion of long-term debt valued at fair value by the entity used in connection with the fair value disclosures required in the footnote disclosures of the financial statements which accrued interest at a set, unchanging rate. + References No definition available. + Details
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- Definition This element represents the portion of long-term debt valued at fair value by the entity used in connection with the fair value disclosures required in the footnote disclosures of the financial statements which accrued interest at a rate subject to change from time to time. + References No definition available. + Details
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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 The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References No definition available. + Details
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- Definition The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References No definition available. + Details
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