Shareholders' equity - Accumulated other comprehensive income (loss) into income expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of goods sold	$ 1,344,645	$ 1,327,558	$ 1,259,954
Income from continuing operations before taxes	75,478	434,012	445,919
Taxes on income from continuing operations	(5,316)	(76,440)	(83,003)
Net of tax	70,162	357,572	362,916
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Impact on income from continuing operations, net of tax	77,888	(6,479)	1,768
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedges | Foreign Exchange Forward
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of goods sold	(1,626)	(12,234)	(3,532)
Income from continuing operations before taxes	(1,626)	(12,234)	(3,532)
Taxes on income from continuing operations	92	385	203
Net of tax	(1,534)	(11,849)	(3,329)
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income from continuing operations before taxes	137,324	6,981	6,643
Taxes on income from continuing operations	(57,902)	(1,611)	(1,546)
Net of tax	79,422	5,370	5,097
Actuarial losses	1,152	7,989	7,660
Prior-service credits	(1,967)	(1,008)	(1,017)
Settlements	$ 138,139	$ 0	$ 0