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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Income Taxes [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income |  |  | $ 736,000 | $ 0
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income - Percentage |  |  | 1.70% | 0.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount |  |  | $ (188,000) | $ (285,000)
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount |  |  | 0 | (390,000)
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount |  |  | 0.000 | (113,000.000)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount |  |  | $ 8,971,000 | $ 18,603,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent |  |  | (1.50%) | 0.00%
effective income tax rate reconciliation, valuation allowance due to foreign losses |  |  | $ (383,000) | $ 275,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00% | 35.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount |  |  | $ 669,000 | $ 876,000
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent |  |  | 0.00% | (0.70%)
Increase in value of kaléo investment held abroad |  |  | $ 0 | $ (2,326,000)
Increase In Value Of kaléo Investment Held Abroad, Percentage |  |  | 0.00% | (4.40%)
Effective Income Tax Rate Reconciliation Amount - FDII |  |  | $ (309,000) | $ 0
Effective Income Tax Rate Reconciliation, Tax Credit, Amount |  |  | $ (655,000) | $ 0
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent |  |  | 1.60% | 1.80%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount |  |  | $ 537,000 | $ 615,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent |  |  | 1.20% | 1.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount |  |  | $ 176,000 | $ 182,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent |  |  | 0.40% | 0.30%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount |  |  | $ 123,000.000 | $ 229,000.000
Effective Income Tax Rate Reconciliation Percent - FDII |  |  | (0.70%) | 0.00%
Effective Income Tax Rate Reconciliation, Tax Settlement, Other, Amount |  |  | $ 100,000 | $ 118,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent |  |  | 0.30% | 0.40%
Effective Income Tax Rate Reconciliation Operating Loss Carryforwards Valuation Allowance For Foreign Country |  |  | (0.90%) | 0.50%
Effective Income Tax Rate Reconciliation, escrow settlement, amount |  |  |  | $ (4,200,000.000)
Effective Tax Rate Reconciliation, Escrow Settlement |  |  |  | (7.90%)
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations |  |  | 0.00% | (0.20%)
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount |  |  | $ 91,000.000 | $ 0.000
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance |  |  | 0.20% | 0.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  |  | $ 0 | $ (413,000)
Effective Income Tax Rate Reconciliation, Deduction, Amount |  |  | (9,834,000.000) | (5,246,000.000)
Income Tax Expense (Benefit) | $ 4,547,000 | $ 2,827,000 | $ 9,834,000 | $ 5,246,000
Effective Income Tax Rate Reconciliation, Percent |  |  | 23.00% | 9.90%
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest | $ 19,269,000 | $ 47,031,000 | $ 42,721,000 | $ 53,152,000
Effective Tax Rate Reconciliation Worthless Stock |  |  |  | (15.20%)
Effective Tax Rate Reconciliation Worthless Stock Deductions, Amount |  |  | $ 0.000 | $ 8,057,000.000
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent |  |  | 0.20% | 0.20%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount |  |  | $ (34,000) | $ 132,000
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% |
Flexible Packaging Films [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Foreign Tax Credit - Brazil |  |  |  | $ 700,000
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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