Condensed Consolidated Statements of Operations shares in Thousands, € in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares
Income Statement [Abstract]
Net sales	$ 450,900,000	$ 463,400,000	$ 1,395,000,000	$ 1,443,300,000
Cost of sales	365,300,000	355,900,000	1,112,900,000	1,103,800,000
Gross profit	85,600,000	107,500,000	282,100,000	339,500,000
Selling, general and administrative expenses	57,500,000	57,900,000	173,600,000	179,700,000
Research and development costs	6,900,000	7,000,000.0	20,000,000.0	20,100,000
Loss (recovery) due to misappropriation of assets, net	(7,300,000)	60,700,000	(6,500,000)	60,700,000
Goodwill impairment	80,800,000	0	80,800,000	0
Other (income) expenses, net	1,400,000	(2,800,000)	4,600,000	(100,000)
Income (loss) from operations	(53,700,000)	(15,300,000)	9,600,000	79,100,000
Interest and other financial expense, net	14,400,000	15,900,000	47,200,000	40,800,000
Income (loss) before earnings in affiliated companies and income taxes	(68,100,000)	(31,200,000)	(37,600,000)	38,300,000
Income tax expense (benefit)	(500,000)	(10,800,000)	13,000,000.0	11,800,000
Earnings in affiliated companies, net of tax	500,000	200,000	1,600,000	500,000
Net income (loss)	$ (67,100,000)	$ (20,200,000)	$ (49,000,000.0)	$ 27,000,000.0
Weighted-average shares outstanding (in thousands):
Basic (in shares) | shares	56,046	58,191	56,415	58,406
Diluted (in shares) | shares	56,249	58,738	56,663	58,942
Earnings (loss) per share:
Basic (in USD per share) | $ / shares	$ (1.20)	$ (0.35)	$ (0.87)	$ 0.46
Diluted (in USD per share) | $ / shares	$ (1.20)	$ (0.35)	$ (0.87)	$ 0.46