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Other (Loss) Income (Tables) | 6 Months Ended
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Jun. 30, 2013
Other Income And Expenses [Abstract] |
Summary of Other (Loss) Income |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
|  | $ |  |  | $ |  |  | $ |  |  | $ |
Gain on sale of other assets |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,217 |
Loss on bond repurchase |  |  | — |  |  |  | — |  |  |  | (1,759 | ) |  |  | — |
Volatile organic compound emission plant lease income |  |  | 39 |  |  |  | 617 |  |  |  | 197 |  |  |  | 1,045 |
Impairment of marketable securities |  |  | (2,062 | ) |  |  | — |  |  |  | (2,062 | ) |  |  | — |
Loss on sale of marketable securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (420 | )
Miscellaneous income (loss) |  |  | 637 |  |  |  | (528 | ) |  |  | 7,480 |  |  |  | (410 | )
Other (loss) income |  |  | (1,386 | ) |  |  | 89 |  |  |  | 3,856 |  |  |  | 2,432 |

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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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