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Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Assets	$ 479,517	$ 542,093
Cash and cash equivalents	48,604	19,232	$ 19,250	$ 30,521
Operating Segments
Assets	479,517	542,093
Cash and cash equivalents	48,604	19,232
Aluminum Extrusions [Member] | Operating Segments
Assets	256,671	293,308
PE Films [Member] | Operating Segments
Assets	58,459	102,431
Flexible Packaging Films [Member] | Operating Segments
Assets	82,789	103,448
Subtotal | Operating Segments
Assets	397,919	499,187
General Corporate | Operating Segments
Assets	$ 32,994	$ 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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