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Income Taxes (Narrative) (Details) (USD $) | 6 Months Ended
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Jun. 30, 2012 | Jun. 30, 2011
Income Taxes [Line Items] |  |
Effective tax rate for continuing operations | 31.20% | 33.70%
Valuation allowance | $ 1,300,000 | $ 61,000
Possible additional tax payments | $ 12,000,000 |
Terphane Ltda [Member] |  |
Income Taxes [Line Items] |  |
Current effective tax rate | 15.25% |
Income tax rate | 6.25% |
Percentage of social contribution on income included in current effective tax rate | 9.00% |
Brazil [Member] |  |
Income Taxes [Line Items] |  |
Federal statutory income tax rate | 34.00% |
Income tax rate | 25.00% |
Percentage of social contribution on income included in federal statutory income tax rate | 9.00% |

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