XML 61 R54.htm IDEA: XBRL DOCUMENT v3.23.2
Operating leases - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Lessee, Lease, Description [Line Items]        
Total lease cost $ 12,535 $ 13,245 $ 25,128 $ 28,182
Right-of-use assets obtained in exchange for lease obligations $ 10,200 $ 29,000 $ 22,500 $ 35,800
Weighted average remaining lease term 7 years 3 days   7 years 3 days  
Weighted average discount rate 2.66%   2.66%  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other Liabilities Other Liabilities Other Liabilities Other Liabilities
Other liabilities        
Lessee, Lease, Description [Line Items]        
Operating lease liabilities $ 40,100 $ 47,000 $ 40,100 $ 47,000
Selling, general and administration costs        
Lessee, Lease, Description [Line Items]        
Total lease cost     19,300 27,100
Direct costs        
Lessee, Lease, Description [Line Items]        
Total lease cost     $ 5,800 $ 1,100