Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net sales	$ 1,806,700,000	$ 1,877,500,000	$ 1,893,900,000
Cost of sales	1,446,900,000	1,448,700,000	1,442,900,000
Gross profit	359,800,000	428,800,000	451,000,000.0
Selling, general and administrative expenses	230,700,000	237,800,000	221,900,000
Research and development costs	27,500,000	27,100,000	24,500,000
Loss (recovery) due to misappropriation of assets, net	(6,900,000)	59,300,000	0
Goodwill impairment	80,800,000	0	0
Other expense (income), net	200,000	1,900,000	(700,000)
Income from operations	27,500,000	102,700,000	205,300,000
Interest and other financial expense, net	62,300,000	49,400,000	50,900,000
Reclassification of actuarial gains from AOCI	0	0	(8,900,000)
Income (loss) before earnings in affiliated companies and income taxes	(34,800,000)	53,300,000	163,300,000
Income tax expense	35,800,000	9,700,000	60,300,000
Earnings in affiliated companies, net of tax	500,000	600,000	500,000
Net income (loss)	$ (70,100,000)	$ 44,200,000	$ 103,500,000
Weighted-average shares outstanding (in thousands):
Basic (in shares)	56,324	58,223	58,995
Diluted (in shares)	56,324	58,373	59,980
Earnings (loss) per share
Basic (in dollars per share)	$ (1.24)	$ 0.76	$ 1.75
Diluted (in dollars per share)	$ (1.24)	$ 0.76	$ 1.73