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10-K Employee Benefit Plans - Schedule of accumulated benefit obligations in excess of plan assets (Details) - Pension benefits - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Projected benefit obligation $ 33,758 $ 44,363
Accumulated benefit obligation 33,758 44,363
Fair value of plan assets $ 28,431 $ 39,345