v3.25.2
Operating leases - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Lessee, Lease, Description [Line Items]          
Total lease cost $ 10,618 $ 8,986 $ 21,049 $ 21,813  
Right-of-use assets obtained in exchange for lease obligations $ 2,800 11,000 $ 9,800 46,600  
Weighted average remaining lease term 6 years 7 days   6 years 7 days   6 years 6 months 21 days
Weighted average discount rate 3.97%   3.97%   4.01%
Operating lease liabilities, current $ 38,700   $ 38,700   $ 36,800
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other Liabilities   Other Liabilities   Other Liabilities
Operating lease liabilities, non-current $ 132,713   $ 132,713   $ 140,085
Selling, general and administration costs          
Lessee, Lease, Description [Line Items]          
Total lease cost 9,200 8,000 18,100 18,000  
Direct costs          
Lessee, Lease, Description [Line Items]          
Total lease cost $ 1,400 $ 1,000 $ 2,900 $ 3,800