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Employee Benefit Plans - Other changes in the plan assets and benefit obligation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Changes in the obligations      
Pension liability, beginning of year $ 23,677 $ 23,831 $ 15,468
Plan amendment 0 6,017 0
Net prior service costs (773) (217) (216)
Net (gain) loss (24,603) (5,954) 8,579
Pension liability, end of year $ (1,699) $ 23,677 $ 23,831