Employee benefit plans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2025	Jun. 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Defined contribution pension plans			$ 4,000	$ 3,500	$ 3,900
Settlement loss on pension plan termination and buy-out			19,670		$ 4,911
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement loss on pension plan termination and buy-out	$ 19,700	$ 4,900
Expected contributions to Defined Benefit Plans in Next Fiscal Year	$ 2,000		$ 2,000
Weighted-average rate determining the actuarial present value of benefit obligation				5.50%