v3.26.1
Operating leases - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Lessee, Lease, Description [Line Items]      
Total lease cost $ 10,401 $ 10,431  
Right-of-use assets obtained in exchange for lease obligations $ 5,000 7,000  
Weighted average remaining lease term 5 years 8 months 23 days   5 years 11 months 15 days
Weighted average discount rate 3.84%   4.04%
Operating lease liabilities, current $ 35,200   $ 36,300
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other Liabilities   Other Liabilities
Operating lease liabilities, non-current $ 111,329 117,100 $ 117,122
Selling, general and administration costs      
Lessee, Lease, Description [Line Items]      
Total lease cost 8,700 8,900  
Direct costs      
Lessee, Lease, Description [Line Items]      
Total lease cost $ 1,700 $ 1,500