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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2023
Retirement Benefits [Abstract]  
Summary of Components of Net Periodic Pension Cost The following table summarizes the components of net periodic pension cost for the three and nine months ended September 30, 2023 and September 30, 2022.

 

 

 

Three Months Ended

 

 

Nine Months Ended

 

 

 

September 30,
2023

 

 

September 30,
2022

 

 

September 30,
2023

 

 

September 30,
2022

 

(Dollars in thousands)

 

 

 

 

 

 

 

 

 

 

 

 

Interest cost

 

$

305

 

 

$

218

 

 

$

913

 

 

$

654

 

Net amortization

 

 

—

 

 

 

83

 

 

 

—

 

 

 

249

 

Net periodic pension cost

 

$

305

 

 

$

301

 

 

$

913

 

 

$

903