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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

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Three Months Ended September 30, 

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Nine Months Ended September 30, 

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Post-Retirement

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Post-Retirement

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Pension Benefits

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Health Benefits

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Pension Benefits

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Health Benefits

(Dollar amounts in thousands)

    

2023

    

2022

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2023

    

2022

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2023

    

2022

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2023

    

2022

Service cost

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$

157

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$

297

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$

5

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$

8

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$

471

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$

892

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$

15

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$

25

Interest cost

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956

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707

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38

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28

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2,868

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2,120

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115

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83

Expected return on plan assets

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(970)

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(1,227)

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—

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—

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(2,909)

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(3,682)

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—

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—

Net amortization of prior service cost

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—

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—

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—

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—

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—

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—

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—

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—

Net amortization of net (gain) loss

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188

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315

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(13)

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—

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564

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944

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(40)

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—

Net Periodic Benefit Cost

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$

331

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$

92

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$

30

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$

36

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$

994

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$

274

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$

90

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$

108