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Plants Shutdowns, Asset Impairments, Restructurings And Other (Schedule Of Accrued Expenses Associated With Asset Impairments And Exit And Disposal Activities) (Details) - USD ($) $ in Thousands | 3 Months Ended | 10 Months Ended | 19 Months Ended
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Dec. 31, 2019
Restructuring Reserve [Roll Forward] |  |  |  |
January 1, 2019 | $ 776 |  |  |
Charges | 1,056 |  |  |
Cash payments | (468) |  |  |
Charges against assets | (404) |  |  |
March 31, 2019 | 960 |  | $ 960 |
Restructuring Reserve, Accrual Adjustment | 0 |  |  |
Severance (a) |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
January 1, 2019 | 616 |  |  |
Charges | 455 |  |  |
Cash payments | (242) |  |  |
March 31, 2019 | 829 |  | 829 |
Long Lived Asset Impairment [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
January 1, 2019 | 0 |  |  |
Charges | 404 |  |  |
Cash payments | 0 |  |  |
Charges against assets | (404) |  |  |
March 31, 2019 | 0 |  | 0 |
Restructuring Reserve, Accrual Adjustment | 0 |  |  |
Other |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
January 1, 2019 | 160 |  |  |
Charges | 197 |  |  |
Cash payments | (226) |  |  |
Charges against assets | 0 |  |  |
March 31, 2019 | 131 |  | 131 |
PE Films |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance Costs | 400 | $ 100 |  |
PE Films | Film Products Manufacturing Facility In Shanghai, China [Member] | Other Restructuring [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance Costs |  |  |  | $ 2,900
Restructuring Reserve [Roll Forward] |  |  |  |
Cash payments | $ (200) |  | $ (2,700) |

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