Shareholders' equity - Accumulated other comprehensive income (loss) into income expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of goods sold	$ 1,259,961	$ 1,212,282	$ 1,186,357
Income from continuing operations before taxes	559,468	357,732	339,903
Taxes (benefit) on income from continuing operations	(74,349)	(21,931)	122,078
Net of tax	485,119	335,801	461,981
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Impact on income from continuing operations, net of tax	6,987	7,699	4,247
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedges | Foreign Exchange Forward
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of goods sold	1,150	2,354	(1,284)
Income from continuing operations before taxes	1,150	2,354	(1,284)
Taxes (benefit) on income from continuing operations	62	(240)	150
Net of tax	1,212	2,114	(1,134)
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	7,531	7,286	7,012
Taxes (benefit) on income from continuing operations	(1,756)	(1,701)	(1,631)
Net of tax	5,775	5,585	5,381
Actuarial losses	8,543	7,253	6,930
Prior-service credits	$ (1,012)	$ 33	$ 82