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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Income Taxes [Line Items] |  |
Income Tax Expense (Benefit) | $ 3,216 | $ 4,779
Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards | $ 100 | $ 0
Effective Income Tax Rate Reconciliation, Percent | 30.60% | 32.60%
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest | $ 10,497 | $ 14,649
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 |
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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