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Components of Net Periodic Benefit Cost (Tables)
9 Months Ended
Sep. 30, 2023
Components of Net Periodic Benefit Cost  
Schedule of Net Periodic Benefit Costs

Three Months Ended September 30, 

Nine Months Ended September 30, 

Post-Retirement

Post-Retirement

Pension Benefits

Health Benefits

Pension Benefits

Health Benefits

(Dollar amounts in thousands)

    

2023

    

2022

2023

    

2022

2023

    

2022

2023

    

2022

Service cost

$

157

$

297

$

5

$

8

$

471

$

892

$

15

$

25

Interest cost

 

956

 

707

 

38

 

28

 

2,868

 

2,120

 

115

 

83

Expected return on plan assets

 

(970)

 

(1,227)

 

 

 

(2,909)

 

(3,682)

 

 

Net amortization of prior service cost

 

 

 

 

 

 

 

 

Net amortization of net (gain) loss

188

315

(13)

564

944

(40)

Net Periodic Benefit Cost

$

331

$

92

$

30

$

36

$

994

$

274

$

90

$

108