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Derivatives, Hedges, Financial Instruments and Carbon Credits (Tables) | 12 Months Ended
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Dec. 31, 2011
Derivatives, Hedges, Financial Instruments and Carbon Credits [Abstract] |
Assets and liabilities measured at fair value on recurring basis |
|  |  |  |  |  | Fair Value Measurements at |  |  |  |
|  |  |  |  |  | December 31, 2011 Using |  |  |  |
|  |  |  |  |  | Quoted Prices |  |  | Significant |  |  |  |  |  |  |
|  | Total Fair |  |  | in Active |  |  | Other |  |  | Significant |  |  | Total Fair |
|  | Value at |  |  | Markets for |  |  | Observable |  |  | Unobservable |  |  | Value at |
|  | December 31, |  |  | Identical Assets |  |  | Inputs |  |  | Inputs |  |  | December 31, |
|  | 2011 |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | 2010 |
Description |  | (In Thousands) |
Assets — Supplies, prepaid items and other: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodities contracts |  | $ | 11 |  |  | $ | 11 |  |  | $ | — |  |  | $ | — |  |  | $ | 761 |
Carbon credits |  |  | 42 |  |  |  | — |  |  |  | — |  |  |  | 42 |  |  |  | 644 |
Foreign exchange contracts |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 49 |
Total |  | $ | 53 |  |  | $ | 11 |  |  | $ | — |  |  | $ | 42 |  |  | $ | 1,454 |
Liabilities — Current and noncurrent accrued and other liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual obligations — carbon credits |  | $ | 42 |  |  | $ | — |  |  | $ | — |  |  | $ | 42 |  |  | $ | 644 |
Interest rate contracts |  |  | 2,241 |  |  |  | — |  |  |  | 2,241 |  |  |  | — |  |  |  | 1,895 |
Total |  | $ | 2,283 |  |  | $ | — |  |  | $ | 2,241 |  |  | $ | 42 |  |  | $ | 2,539 |
Reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) |
|  | Assets |  |  | Liabilities |
|  | 2011 |  |  | 2010 |  |  | 2009 |  |  | 2011 |  |  | 2010 |  |  | 2009 |
|  | (In Thousands) |
Beginning balance |  | $ | 644 |  |  | $ | — |  |  | $ | — |  |  | $ | (644 | ) |  | $ | — |  |  | $ | (1,388 | )
Transfers into Level 3 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Transfers out of Level 3 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total realized and unrealized gains (losses) included in earnings |  |  | 1,995 |  |  |  | 644 |  |  |  | — |  |  |  | (1,844 | ) |  |  | (644 | ) |  |  | 493 |
Purchases |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Issuances |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Sales |  |  | (2,597 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Settlements |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,446 |  |  |  | — |  |  |  | 895 |
Ending balance |  | $ | 42 |  |  | $ | 644 |  |  | $ | — |  |  | $ | (42 | ) |  | $ | (644 | ) |  | $ | — |
Total gains (losses) for the period included in earnings attributed to the change in unrealized gains or losses on assets and liabilities still held at the reporting date |  | $ | 42 |  |  | $ | 644 |  |  | $ | — |  |  | $ | (42 | ) |  | $ | (644 | ) |  | $ | — |
Realized and unrealized net losses included in earnings and the income statement |
|  | 2011 |  |  | 2010 |  |  | 2009 |
|  | (In Thousands) |
Total net gains (losses) included in earnings: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales — Commodities contracts |  | $ | (523 | ) |  | $ | (59 | ) |  | $ | (1,312 | )
Cost of sales — Foreign exchange contracts |  |  | 46 |  |  |  | 25 |  |  |  | (32 | )
Other income — Carbon credits |  |  | 1,995 |  |  |  | 644 |  |  |  | — |
Other expense — Contractual obligations relating to carbon credits |  |  | (1,844 | ) |  |  | (644 | ) |  |  | — |
Interest expense — Interest rate contracts |  |  | (1,925 | ) |  |  | (1,527 | ) |  |  | (729 | )
|  | $ | (2,251 | ) |  | $ | (1,561 | ) |  | $ | (2,073 | )
Change in unrealized gains (losses) relating to contracts still held at year end: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales — Commodities contracts |  | $ | 11 |  |  | $ | 761 |  |  | $ | 138 |
Cost of sales — Foreign exchange contracts |  |  | — |  |  |  | 49 |  |  |  | — |
Other income — Carbon credits |  |  | 42 |  |  |  | 644 |  |  |  | — |
Other expense — Contractual obligations relating to carbon credits |  |  | (42 | ) |  |  | (644 | ) |  |  | — |
Interest expense — Interest rate contracts |  |  | (346 | ) |  |  | 34 |  |  |  | 508 |
|  | $ | (335 | ) |  | $ | 844 |  |  | $ | 646 |
The estimated fair value and carrying value of long-term debt |
|  | December 31, 2011 |  |  | December 31, 2010 |
|  | Estimated |  |  | Carrying |  |  | Estimated |  |  | Carrying |
|  | Fair Value |  |  | Value |  |  | Fair Value |  |  | Value |
|  | (In Thousands) |
Variable Interest Rate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Term Loan (1) |  | $ | 72,188 |  |  | $ | 72,188 |  |  | $ | 26,721 |  |  | $ | 48,773 |
Working Capital Revolver Loan |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Other debt (2) |  |  | — |  |  |  | — |  |  |  | 2,437 |  |  |  | 2,437 |
Fixed Interest Rate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
5.5% Convertible Senior Subordinated Notes |  |  | — |  |  |  | — |  |  |  | 27,976 |  |  |  | 26,900 |
Other bank debt and equipment financing |  |  | 7,211 |  |  |  | 7,272 |  |  |  | 17,251 |  |  |  | 17,282 |
|  | $ | 79,399 |  |  | $ | 79,460 |  |  | $ | 74,385 |  |  | $ | 95,392 |
(1) |  | Includes a fixed interest rate of 5.15% on the principal amount of $24.1 million at December 31, 2011.
(2) |  | At December 31, 2010, the balance includes a variable interest rate debt agreement with a minimum interest rate of 6%, which interest rate was 6%.

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- Definition Tabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs). + References No definition available. + Details
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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 14 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15 -Subparagraph b-d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13476-108611 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13467-108611 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph c(2), d, e, f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a, c(1), c(2), c(3), d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 19 -Subparagraph a, b, c(1), d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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