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Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Assets	$ 484,869	$ 542,093
Cash and cash equivalents	21,193	19,232	$ 27,462	$ 30,521
Aluminum Extrusions [Member]
Assets	266,426	293,308
PE Films [Member]
Assets	82,191	102,431
Flexible Packaging Films [Member]
Assets	91,568	103,448
Subtotal
Assets	440,185	499,187
General Corporate
Assets	$ 23,491	$ 23,674

X

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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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