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COMPONENTS OF PENSION PLAN NET PERIODIC BENEFIT COSTS (Tables)
9 Months Ended
Sep. 30, 2024
Defined benefit pension plan  
Compensation And Pneumoconiosis Benefits  
Components of net periodic benefit cost

    

Three Months Ended

Nine Months Ended

September 30, 

September 30, 

2024

    

2023

    

2024

    

2023

    

(in thousands)

Interest cost

$

1,289

$

1,294

$

3,817

$

3,885

Expected return on plan assets

 

(1,752)

 

(1,553)

 

(5,278)

 

(4,668)

Amortization of prior service cost

47

47

140

140

Amortization of net loss

 

136

 

169

 

245

 

513

Net periodic benefit credit (1)

$

(280)

$

(43)

$

(1,076)

$

(130)

(1)Net periodic benefit credit for the Pension Plan is included in the Other income (expense) line item within our condensed consolidated statements of income.