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Other Expense, Other Income and Non-Operating Other Income (Expense), net (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Other expense: |  |  |  |
Losses on sales and disposals of property and equipment | $ 536 | $ 914 | $ 551 | $ 895
Loss on contractual obligations associated with carbon credits |  | 896 |  | 936
Miscellaneous expense | 19 | 511 | 171 | 552
Total other expense | 555 | 2,321 | 722 | 2,383
Other income: |  |  |  |
Gains on carbon credits |  | 990 |  | 1,030
Settlements of litigation and potential litigation |  | 10 |  | 757
Miscellaneous income | 112 | 105 | 348 | 190
Total other income | 112 | 1,105 | 348 | 1,977
Non-operating other income (expense), net: |  |  |  |
Interest income | 24 | 17 | 48 | 41
Miscellaneous income | 263 |  | 263 |
Miscellaneous expense | (20) | (19) | (39) | (36)
Total non-operating other income (expense), net | $ 267 | $ (2) | $ 272 | $ 5

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- Definition Gains recognized (realized and/or unrealized) from sales of carbon credits occurring during the reporting period. + References No definition available. + Details
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- Definition Losses incurred (realized and/or 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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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