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Pension and Supplemental Executive Retirement Plans (Tables)
9 Months Ended
Sep. 30, 2023
Retirement Benefits [Abstract]  
Activity in the Defined Benefit Plan
The following table presents information pertaining to the activity in our defined benefit pension plan, using the latest available actuarial valuations with a measurement date of September 30, 2023 and 2022 for the periods shown:

Three Months Ended September 30,Nine Months Ended September 30,
(Dollars in thousands)2023202220232022
Interest cost$113 $85 339 255 
Expected return on plan assets(164)(167)(492)(501)
Amortization of net actuarial loss29 107 87 321 
     Net periodic benefit (income) cost$(22)$25 $(66)$75 
Contributions paid$— $— $— $—