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Income Taxes (Narrative) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Income Taxes [Line Items] |  |  |
Benefit from the tax incentives | $ 2,500,000 | $ 4,300,000 | $ 700,000
Benefit from the tax incentives, per share | $ 0.08 | $ 0.13 | $ 0.02
Valuation allowance | 20,019,000 | 18,635,000 |
Balance of unrecognized state tax positions | 1,000,000 |  |
State And Foreign Net Operating Loss Carryforwards |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance | 1,700,000 | 1,300,000 |
Excess Capital Losses From Investments And Other Related Items |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance | 15,500,000 | 16,400,000 |
Asset Impairments In Foreign Jurisdictions |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance | $ 1,900,000 | $ 1,900,000 |
Terphane Ltda |  |  |
Income Taxes [Line Items] |  |  |
Income tax rate | 6.25% |  |
Current effective tax rate | 15.25% |  |
Percentage of social contribution on income included in current effective tax rate | 9.00% |  |
Brazilian |  |  |
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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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 11.C) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 11 -Section C + Details
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