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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Jun. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Income Taxes [Line Items] |  |  |  |  |  |
Effective Tax Rate Reconciliation, Escrow Settlement |  |  |  |  | (6.40%) |
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations |  |  |  |  | 0.20% | (1.10%)
Income Tax Expense (Benefit) | $ 4,422 |  | $ (2,669) |  | $ 9,667 | $ 1,864
Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards |  |  |  |  | $ 100 |
Effective Income Tax Rate Reconciliation, Percent |  |  |  |  | 14.70% | 7.60%
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest | 12,696 |  | $ 9,379 |  | $ 65,847 | $ 24,602
Effective Tax Rate Reconciliation Worthless Stock |  |  |  |  | (12.20%) |
Brazilian [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Effective income tax rate reconciliation social contribution on income |  |  |  |  | 9.00% |
Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Excluding Social Contribution On Income |  |  |  |  | 25.00% |
Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Including Social Contribution On Income |  |  |  |  | 34.00% |
Excess Capital Losses From Investments And Other Related Items [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Deferred Tax Assets, Valuation Allowance | $ 11,200 |  |  |  | $ 11,200 |
Flexible Packaging Films [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Foreign Earnings Repatriated |  |  |  | $ 10,700 |  |
Worthless Stock Tax Deductible Amount |  | $ 8,100 |  |  |  |
Foreign Income Tax Expense (Benefit), Continuing Operations |  | $ 400 |  |  |  |
Terphane Ltda [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Current Effective Tax Rate Including Social Contribution On Income |  |  |  |  | 15.25% |
LengthBrazilianTaxIncentive |  |  |  |  | 10 years |

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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate on foreign earnings that are not expected to be permanently reinvested in the foreign country. + References No definition available. + Details
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