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Other Expense, Other Income and Non-Operating Other Income, net (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Other expense: |  |  |
Realized and unrealized losses on contractual obligations associated with carbon credits | $ 1,844 | $ 644 |
Losses on sales and disposals of property and equipment | 1,280 | 460 | 378
Miscellaneous expense, operating | 699 | 158 | 149
Total other expense | 3,823 | 1,262 | 527
Other Operating Income |  |  |
Realized and unrealized gains on carbon credits | 1,995 | 644 |
Settlements of litigation and potential litigation | 1,562 |  | 50
Property insurance recoveries in excess of losses incurred |  | 7,518 |
Miscellaneous Income, Operating | 381 | 265 | 237
Total other income | 3,938 | 8,427 | 287
Non-operating other income, net: |  |  |
Interest income | 77 | 133 | 216
Miscellaneous income, Non-Operating |  |  | 1
Miscellaneous expense, Non-Operating | (77) | (80) | (87)
Total non-operating other income, net |  | $ 53 | $ 130

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- Definition Miscellaneous operating cost and expense items that are associated with the entity's normal revenue producing operation. + References No definition available. + Details
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- Definition Miscellaneous non-operating income items resulting from ancillary business-related activities. + References No definition available. + Details
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- Definition The amount of property insurance recoveries in excess of losses incurred. + References No definition available. + Details
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- Definition Gains recognized (both realized and unrealized) from sales of carbon credits occurring during the reporting period. + References No definition available. + Details
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- Definition Losses incurred (both realized and unrealized) from contractual obligations related to carbon credits during the reporting period. + References No definition available. + Details
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- Definition The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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