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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Line Items] |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent |  |  |  |  | 356.50% | 11.60% | (38.50%)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent |  |  |  |  | (17.10%) | 1.80% | 3.10%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent |  |  |  |  | (4.40%) | 2.30% | 0.30%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent |  |  |  |  | (2.10%) | 1.20% | (2.10%)
Changes in estimates related to prior year tax provision |  |  |  |  | $ 320 | $ 330 | $ 489
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount |  |  |  |  | $ 83.000 | $ 267.000 | $ (311.000)
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent |  |  |  |  | 0.00% | (23.70%) | 0.10%
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent |  |  |  |  | 0.00% | (2.70%) | 3.60%
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount |  |  |  |  | $ 0.000 | $ (256.000) | $ (502.000)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent |  |  |  |  | (4.20%) | 1.40% | (1.90%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount |  |  |  |  | $ 633.000 | $ 396.000 | $ 448.000
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Percent |  |  |  |  | 2.80% | 0.40% | (3.10%)
Increase In Value Of kaléo Investment Held Abroad, Percentage |  |  |  |  | 15.60% | (0.70%) | (10.90%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent |  |  |  |  | 29.70% | 0.00% | 0.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  | 21.00% | 35.00% | 35.00% | 35.00%
Effective Tax Rate Reconciliation Worthless Stock Deductions, Amount |  |  |  |  | $ (61,413.000) | $ 0.000 | $ 0.000
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent |  |  |  |  | 411.90% | 0.00% | 0.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  |  |  | $ 3,900,000 |  |
Foreign Income Tax Expense (Benefit), Continuing Operations |  |  |  |  | 13,300,000 |  |
Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards |  |  |  |  | 0 |  |
excess foreign tax credits repatriation |  |  |  |  | 6,400,000 |  |
Valuation allowance | $ 28,499,000 |  |  |  | 28,499,000 | $ 12,694,000 |
Balance of unrecognized state tax positions | 800,000 |  |  |  | 800,000 |  |
Income tax expense (benefit) at federal statutory rate |  |  |  |  | (5,219) | 9,689 | $ (8,122)
Impact of U.S. Tax Cuts and Jobs Act |  |  |  |  | $ (4,433) | 0 | 0
Effective Tax Rate Reconciliation, Escrow Settlement |  |  |  |  | 28.20% |  |
Increase in value of kaléo investment held abroad |  |  |  |  | $ (2,326) | $ (197) | $ 2,523
Unremitted earnings from foreign operations |  |  |  |  | 0.00% | (0.90%) | 2.20%
Domestic Production Activities Deduction |  |  |  |  | $ 0 | $ 735 | $ 840
Remitted earnings from foreign operations |  |  |  |  | 0 | (6,574) | (18)
State taxes, net of federal income tax benefit |  |  |  |  | 656 | 647 | (67)
Foreign rate differences |  |  |  |  | $ 2,546 | $ 499 | $ (719)
Valuation allowance due to foreign losses and impairments |  |  |  |  | (139.30%) | (1.50%) | 0.00%
Income tax expense (benefit) at effective income tax rate |  |  |  |  | $ 53,163 | $ (3,217) | $ (8,928)
State And Foreign Net Operating Loss Carryforwards |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Operating Loss Carryforwards | 33,400,000 |  |  |  | 33,400,000 | 4,900,000 |
Valuation allowance | 8,500,000 |  |  |  | 8,500,000 | 1,500,000 | 1,500,000
Excess Capital Losses From Investments And Other Related Items |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Valuation allowance | 11,200,000 |  |  |  | 11,200,000 | 4,400,000 | 10,900,000
Asset Impairments In Foreign Jurisdictions |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Valuation allowance | 15,600,000 |  |  |  | $ 15,600,000 | $ 0 | $ 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% |  |
Hungary |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Income 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% |  |
Minimum |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Net Operating Loss Carrforward Expiration Period |  |  |  |  | 10 years |  |
Maximum |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Net Operating Loss Carrforward Expiration Period |  |  |  |  | 20 years |  |
Flexible Packaging Films [Member] |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Effective Tax Rate Reconciliation Worthless Stock Deductions, Amount | 54,000,000 |  |  |  |  |  |
Effective Tax Rate Reconciliation Worthless Stock Deductions, Amount, Effect of Tax Rate Change | 4,800,000 |  |  |  |  |  |
Foreign Income Tax Expense (Benefit), Continuing Operations |  | $ 400,000 |  |  |  |  |
Worthless Stock Tax Deductible Amount | $ 153,000,000 | $ 8,100,000 |  |  |  |  |
Foreign Earnings Repatriated |  |  | $ 10,700,000 |  |  |  |

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