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Business Segments (Schedule Of Identifiable Assets By Geographic Area, Property, Plant & Equipment, Net By Geographic Area) (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	[1]	$ 514,870	$ 712,668
Property, Plant & Equipment, Net by Geographic Area, Total		166,545	173,556
Cash, Cash Equivalents, and Federal Funds Sold	[1]	11,846	31,422
Property, Plant & Equipment, Net of Discontinued operations by Geographic Area, Total	[1]	166,545	242,890
Disposal Group, Including Discontinued Operation, Assets		1,490	108,279
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		0	69,334
United States
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	[1]	363,106	403,366
Property, Plant & Equipment, Net by Geographic Area, Total	[1]	132,268	140,609
General Corporate
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	[1]	71,508	109,655
Property, Plant & Equipment, Net by Geographic Area, Total	[1]	2,444	1,389
Operations Outside The United States | Brazil
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	[1]	49,157	41,890
Property, Plant & Equipment, Net by Geographic Area, Total	[1]	15,588	15,348
Operations Outside The United States | China
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	[1]	17,763	18,056
Property, Plant & Equipment, Net by Geographic Area, Total	[1]	$ 16,245	$ 16,210
[1] Cash and cash equivalents includes funds held in locations outside the U.S. of $9.4 million and $8.9 million at December 31, 2020 and 2019, respectively. (c)Information on exports and foreign operations are provided on the previous page. Export sales relate almost entirely to PE Films. Operations in China relate to PE Films. Operations in Brazil relate to Flexible Packaging Films.

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Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Includes PP&E reclassified to long-term assets for discontinued operations.

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