v3.26.1
Fair value measurements - Schedule of Fair Value of Deferred Compensation Plan Assets (Details) - Deferred Compensation Plan Assets - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Opening balance $ 76,775 $ 61,812 $ 75,586 $ 61,549
Additions (net of redemption) 1,107 941 3,733 2,345
Change in fair value of deferred compensation plan assets 8,788 5,603 7,351 4,462
Closing balance $ 86,670 $ 68,356 $ 86,670 $ 68,356