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Employee Benefit Plans - Accumulated Post-Retirement Benefit Obligation, Funded Status, and Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Change in benefit obligation    
Benefit obligation at beginning of year $ 1,091 $ 1,050
Interest cost 0 5
Benefits paid (21) (22)
Benefit obligation at end of period 1,070 1,033
Funded status    
Benefit obligation at end of period (1,070) (1,033)
Unamortized gain (384) (345)
Accrued benefit cost at end of period (1,454) (1,378)
Components of net periodic benefit cost    
Interest cost 0 5
Net periodic benefit cost $ 0 $ 5