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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 156 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 30, 2027
Income Taxes [Line Items] |  |  |  |  |
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income |  |  | $ 3,062 | $ 670 |
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income - Percentage |  |  | 7.80% | (7.70%) |
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount |  |  | $ (644) | $ (355) |
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount |  |  | 0 | 148 |
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount |  |  | $ 8,225 | $ (1,833) |
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent |  |  | (15.00%) | 35.00% |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00% | 21.00% |
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount |  |  | $ 2,925 | $ 2,425 |
Effective Income Tax Rate Reconciliation, Tax Credit, Amount |  |  | $ (5,872) | $ (3,041) |
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent |  |  | 7.50% | (27.90%) |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount |  |  | $ 584 | $ (220) |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent |  |  | 1.50% | 2.50% |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount |  |  | $ 480 | $ 247 |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent |  |  | 1.20% | (2.80%) |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount |  |  | $ 411 | $ 293 |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent |  |  | 1.00% | (3.40%) |
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations |  |  | 0.00% | (1.70%) |
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount |  |  | $ 132 | $ 40 |
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance |  |  | 0.30% | (0.50%) |
Effective Income Tax Rate Reconciliation, Deduction, Amount | $ (8,820) |  |  | $ (2,366) |
Goodwill, Impairment Loss | 0 | $ 0 | $ 0 | $ 13,696 |
Effective Income Tax Rate Reconciliation, Percent |  |  | 22.50% | 27.10% |
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest | 26,451 | 18,192 | $ 39,166 | $ (8,698) |
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent |  |  | 0.00% | 1.70% |
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount |  |  | $ (450) | $ (592) |
Income Tax Expense (Benefit) | $ 5,723 | $ 3,860 | 8,820 | (2,366) |
Current Income Tax Expense (Benefit) |  |  | $ 8,800 |  |
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 |  |  | $ 5,900 | $ 3,000 |
Terphane Ltda [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Current Effective Tax Rate Including Social Contribution On Income |  |  | 15.25% |  |
LengthBrazilianTaxIncentive |  |  |  |  | 13 years

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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