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Components of Net Periodic Benefit Cost (Tables)
9 Months Ended
Sep. 30, 2022
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)

    

2022

    

2021

2022

    

2021

2022

    

2021

2022

    

2021

Service cost

$

297

$

339

$

8

$

10

$

892

$

1,016

$

25

$

32

Interest cost

 

707

 

658

 

28

 

26

 

2,120

 

1,974

 

83

 

77

Expected return on plan assets

 

(1,227)

 

(1,178)

 

 

 

(3,682)

 

(3,535)

 

 

Net amortization of prior service cost

 

 

 

 

 

 

 

 

Net amortization of net (gain) loss

315

518

944

1,554

Net Periodic Benefit Cost

$

92

$

337

$

36

$

36

$

274

$

1,009

$

108

$

109