v3.22.4
Retirement plans - Schedule of Pension Costs (Details) - Retirement Plans - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
Service cost-benefits earned during the period $ 0 $ 2 $ 7
Interest cost on benefit obligation 16,830 15,887 19,487
Expected return on plan assets (19,502) (34,679) (31,058)
Amortization of prior service cost 90 90 90
Amortization of actuarial loss 4,583 4,952 6,207
Pension payment timing related charge 300 946 0
Expense for (income from) company-sponsored retirement plans $ 2,301 $ (12,802) $ (5,267)