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Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Assets	$ 564,671	$ 523,584
Cash and cash equivalents	25,648	30,521	$ 21,859	$ 11,846
Disposal Group, Including Discontinued Operation, Assets	151	178
Aluminum Extrusions [Member]
Assets	311,971	280,521
PE Films [Member]
Assets	115,307	113,613
Flexible Packaging Films [Member]
Assets	92,852	75,269
Subtotal
Assets	520,130	469,403
General Corporate
Assets	$ 18,742	$ 23,482

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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