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BUSINESS SEGMENTS - Schedule of Identifiable Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Revenue from External Customer [Line Items]
Total	$ 403,643	$ 371,372
Operating Segments
Revenue from External Customer [Line Items]
Total	403,643	371,372
Cash and cash equivalents	15,611	6,729
Aluminum Extrusions | Operating Segments
Revenue from External Customer [Line Items]
Total	300,531	269,802
High Performance Films | Operating Segments
Revenue from External Customer [Line Items]
Total	53,511	52,998
Subtotal | Operating Segments
Revenue from External Customer [Line Items]
Total	354,042	322,800
General corporate | Operating Segments
Revenue from External Customer [Line Items]
Total	$ 33,990	$ 41,843

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