Shareholders' equity - Change in accumulated other comprehensive income (loss), net of tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 4,021,968	$ 3,754,748	$ 3,336,457
Other comprehensive income (loss) before reclassifications	95,596	(58,331)
Amounts reclassified from accumulated other comprehensive income	(6,479)	1,768
Other comprehensive (loss) income	89,117	(56,563)	(49,661)
Ending Balance	4,440,988	4,021,968	3,754,748
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	4,931	1,081
Other comprehensive income (loss) before reclassifications	8,314	7,179
Amounts reclassified from accumulated other comprehensive income	(11,849)	(3,329)
Other comprehensive (loss) income	(3,535)	3,850
Ending Balance	1,396	4,931	1,081
Pension and Other Postretirement Benefit Plans
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(135,799)	(138,290)
Other comprehensive income (loss) before reclassifications	42,380	(2,606)
Amounts reclassified from accumulated other comprehensive income	5,370	5,097
Other comprehensive (loss) income	47,750	2,491
Ending Balance	(88,049)	(135,799)	(138,290)
Foreign Currency Translation Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(272,654)	(209,750)
Other comprehensive income (loss) before reclassifications	44,902	(62,904)
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive (loss) income	44,902	(62,904)
Ending Balance	(227,752)	(272,654)	(209,750)
Accumulated Other Comprehensive Loss (income)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(403,522)	(346,959)	(297,298)
Other comprehensive (loss) income	89,117	(56,563)	(49,661)
Ending Balance	$ (314,405)	$ (403,522)	$ (346,959)