v3.26.1
Operating leases - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Lessee, Lease, Description [Line Items]          
Total lease cost $ 10,128 $ 10,618 $ 20,529 $ 21,049  
Right-of-use assets obtained in exchange for lease obligations $ 1,900 2,800 $ 6,900 9,800  
Weighted average remaining lease term 5 years 7 months 28 days   5 years 7 months 28 days   5 years 11 months 15 days
Weighted average discount rate 3.83%   3.83%   4.04%
Operating lease liabilities, current $ 32,500   $ 32,500   $ 36,300
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other Liabilities   Other Liabilities   Other Liabilities
Operating lease liabilities, non-current $ 102,790   $ 102,790   $ 117,122
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization          
Lessee, Lease, Description [Line Items]          
Total lease cost 1,600 1,400 3,100 2,900  
Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense          
Lessee, Lease, Description [Line Items]          
Total lease cost $ 8,500 $ 9,200 $ 17,400 $ 18,100