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Losses Associated With Plant Shutdowns, Asset Impairments And Restructurings, Unusual Items, Gains From Sale Of Assets And Other Items Shanghai Plant Shutdown (Details) - USD ($) $ in Thousands | 12 Months Ended | 18 Months Ended | 19 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2016
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Loss on asset impairments | $ 519 | $ 223 | $ 101,282 |  |  |
PE Films [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other Restructuring Costs | 52 |  |  |  |  |
PE Films [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Severance Costs | 800 |  |  |  |  |
Accelerated Depreciation Expense | 1,200 | 600 | 300 |  |  |
Employee Severance [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Reserve | 1,294 | 616 | 627 |  | $ 1,294 | $ 1,854
Payments for Restructuring | (1,739) | (2,665) | (1,816) |  |  |
Restructuring Reserve Charged Against Assets | 0 | 0 | 0 |  |  |
Restructuring Reserve Reversed to Income |  | 0 |  |  |  |
Severance Costs |  | 2,654 | 589 |  |  |
Other Restructuring Costs | 2,417 |  |  |  |  |
Employee Severance [Member] | Terphane Ltda [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items |  |  | 0 |  |  |
Employee Severance [Member] | PE Films [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other Restructuring Costs | 842 | 822 | 589 |  |  |
Employee Severance [Member] | PE Films [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Severance Costs | 800 | 700 | 200 |  |  |
Employee Severance [Member] | PE Films [Member] | Film Products Manufacturing Facility in Shanghai, China |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 113 | 1,832 |  |  |  |
Long Lived Asset Impairment [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Reserve | 0 | 0 | 0 |  | 0 | 0
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items |  | 233 | 101,595 |  |  |
Payments for Restructuring | 0 | 0 | 0 |  |  |
Restructuring Reserve Charged Against Assets | (882) | (141) | (101,595) |  |  |
Restructuring Reserve Reversed to Income |  | (92) |  |  |  |
Other Restructuring Costs | 882 |  |  |  |  |
Long Lived Asset Impairment [Member] | Terphane Ltda [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items |  |  | 101,254 |  |  |
Long Lived Asset Impairment [Member] | PE Films [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other Restructuring Costs | 595 | 0 | 341 |  |  |
Long Lived Asset Impairment [Member] | PE Films [Member] | Film Products Manufacturing Facility in Shanghai, China |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 0 | 200 |  |  |  |
Other Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Reserve | 86 | 160 | 476 |  | 86 | 554
Restructuring and Related Cost, Incurred Cost |  |  | 304 |  |  |
Payments for Restructuring | (900) |  | (382) |  |  |
Restructuring Reserve Charged Against Assets | 0 | 0 | 0 |  |  |
Restructuring Reserve Reversed to Income |  | 0 |  |  |  |
Other Restructuring Costs | 826 | 118 |  |  |  |
Other Restructuring [Member] | Aluminum Extrusions [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other Restructuring Costs |  |  | 304 |  |  |
Other Restructuring [Member] | Terphane Ltda [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items |  |  | 0 |  |  |
Other Restructuring [Member] | PE Films [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other Restructuring Costs |  | 20 |  |  |  |
Other Restructuring [Member] | PE Films [Member] | Film Products Manufacturing Facility in Shanghai, China |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 716 | 98 |  |  |  |
Payments for Restructuring | 800 | (434) |  |  | 3,300 |
Other Restructuring Costs after Taxes |  |  |  |  | 4,100 |
Other Accrued Expenses [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Reserve | 1,380 | 776 | 1,103 |  | $ 1,380 | $ 2,408
Restructuring and Related Cost, Incurred Cost |  |  | 102,488 |  |  |
Payments for Restructuring | (2,639) | (3,099) | (2,198) |  |  |
Restructuring Reserve Charged Against Assets | (882) | (141) | (101,595) |  |  |
Restructuring Reserve Reversed to Income |  | (92) |  |  |  |
Other Restructuring Costs | 4,125 | 3,005 |  |  |  |
Other Accrued Expenses [Member] | Aluminum Extrusions [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other Restructuring Costs | 1,489 | 842 | 1,234 |  |  |
Other Accrued Expenses [Member] | Terphane Ltda [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items |  |  | $ 101,254 |  |  |
Other Accrued Expenses [Member] | PE Films [Member] | Film Products Manufacturing Facility in Shanghai, China |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 829 | $ 2,163 |  |  |  |
Personal Care Materials [Member] | Employee Severance [Member] | PE Films [Member] | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 874 |  |  |  |  |
Personal Care Materials [Member] | Employee Severance [Member] | PE Films [Member] | PE Films Personal Care European Operations [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 588 |  |  |  |  |
Personal Care Materials [Member] | Long Lived Asset Impairment [Member] | PE Films [Member] | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 200 |  |  |  |  |
Personal Care Materials [Member] | Long Lived Asset Impairment [Member] | PE Films [Member] | PE Films Personal Care European Operations [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 100 |  |  |  |  |
Personal Care Materials [Member] | Other Restructuring [Member] | PE Films [Member] | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 58 |  |  |  |  |
Restructuring, Settlement and Impairment Provisions |  |  |  | $ 7,600 |  |
Payments for Restructuring | 500 |  |  |  |  |
Severance Costs |  |  |  | 1,800 |  |
Accelerated Depreciation Expense |  |  |  | 1,600 |  |
Other Restructuring Costs |  |  |  | 5,100 |  |
Other Restructuring Costs after Taxes | 2,700 |  |  |  |  |
Other Plant Consolidation Expenses - Cost of Goods Sold |  |  |  | 700 |  |
Personal Care Materials [Member] | Other Restructuring [Member] | PE Films [Member] | PE Films Personal Care European Operations [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 0 |  |  |  |  |
Restructuring, Settlement and Impairment Provisions |  |  |  | $ 1,700 |  |
Payments for Restructuring | 500 |  |  |  |  |
Other Restructuring Costs after Taxes | 800 |  |  |  |  |
Personal Care Materials [Member] | Other Accrued Expenses [Member] | PE Films [Member] | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | 1,123 |  |  |  |  |
Personal Care Materials [Member] | Other Accrued Expenses [Member] | PE Films [Member] | PE Films Personal Care European Operations [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items | $ 684 |  |  |  |  |

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