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Employee benefits - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Defined benefit liability	$ 31,100,000		$ 31,100,000		$ 31,600
Defined benefit plan, expected future benefit payment, 2026	800,000		800,000
Defined benefit plan, expected future benefit payment, 2027	700,000		700,000
Defined benefit plan, expected future benefit payment, 2028	1,300,000		1,300,000
Defined benefit plan, expected future benefit payment, 2029	1,600,000		1,600,000
Defined benefit plan, expected future benefit payment, 2030	3,300,000		3,300,000
Defined benefit plan, expected future benefit payment, 2031 through 2035	14,000,000		14,000,000
Austria [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans	11,600,000	$ 10,100,000	23,500,000	$ 19,900,000
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans	$ 3,300,000	$ 2,500,000	$ 4,300,000	$ 3,300,000