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Benefit Plans - (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Components of net periodic benefit cost        
Service cost $ 81 $ 76 $ 162 $ 152
Interest cost 81 78 162 156
Expected return on plan assets (156) (133) (312) (266)
Amortization (accretion) of prior service cost and net loss (22) (10) (44) (20)
Pension (contra expense) expense $ (16) $ 11 $ (32) $ 22