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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Income Taxes [Line Items] |  |  |  |
Income Tax Expense (Benefit) | $ 1,317 | $ 903 | $ 4,533 | $ 5,682
Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards |  |  | $ 100 | $ 0
Effective Income Tax Rate Reconciliation, Percent |  |  | 29.80% | 35.20%
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest | 4,725 | $ 1,497 | $ 15,223 | $ 16,146
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 | $ 10,800 |  | $ 10,800 |
Terphane Ltda [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
BrazilianTaxCreditDeductionPeriod |  |  | 24 months |
Current Effective Tax Rate Including Social Contribution On Income |  |  | 15.25% |
LengthBrazilianTaxIncentive |  |  | 10 years |

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