Business Segments - Summary of Segment Operating Results (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 321,602	$ 316,276
Aluminum and other material costs	171,369	154,391
Manufacturing costs	114,733	118,977
Manufacturing depreciation and amortization	19,400	21,762
Selling, general and administrative expenses	15,478	20,832
Segment expenses	320,980	315,962
Income (loss) from operations	622	314
Supplemental Segment Financial Information:
Depreciation and amortization	19,542	21,946
Capital expenditures	5,964	6,618
Long-lived assets:
Property, plant, and equipment	329,693		$ 329,892
Intangible assets	8,251		12,612
Segment assets	763,779		740,129
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	203,708	193,508
Aluminum and other material costs	114,930	99,888
Manufacturing costs	66,611	65,466
Manufacturing depreciation and amortization	8,556	10,228
Selling, general and administrative expenses	8,676	9,844
Segment expenses	198,773	185,426
Income (loss) from operations	4,935	8,082
Supplemental Segment Financial Information:
Depreciation and amortization	8,656	10,343
Capital expenditures	2,837	4,557
Long-lived assets:
Property, plant, and equipment	169,327		174,180
Segment assets	408,550		407,800
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	117,894	122,768
Aluminum and other material costs	56,439	54,503
Manufacturing costs	48,122	53,511
Manufacturing depreciation and amortization	10,844	11,534
Selling, general and administrative expenses	6,802	10,988
Segment expenses	122,207	130,536
Income (loss) from operations	(4,313)	(7,768)
Supplemental Segment Financial Information:
Depreciation and amortization	10,886	11,603
Capital expenditures	3,127	$ 2,061
Long-lived assets:
Property, plant, and equipment	160,366		155,712
Intangible assets	8,251		12,612
Segment assets	$ 355,229		$ 332,329