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Workers' Compensation And Pneumoconiosis (Tables)
6 Months Ended
Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]  
Reconciliation of changes in workers' compensation liability

    

Three Months Ended

Six Months Ended

 

June 30, 

June 30, 

2025

    

2024

    

2025

    

2024

(in thousands)

Beginning balance

$

48,511

$

47,561

$

47,870

$

47,975

Changes in accruals

 

3,419

 

3,365

 

6,795

 

6,490

Payments

 

(3,762)

 

(3,446)

 

(7,064)

 

(7,494)

Interest accretion

 

570

 

509

 

1,137

 

1,018

Valuation loss (gain) (1)

 

496

(795)

 

496

(795)

Ending balance

$

49,234

$

47,194

$

49,234

$

47,194

Pneumoconiosis benefits  
Defined Benefit Plan Disclosure [Line Items]  
Components of net periodic benefit cost

    

Three Months Ended

Six Months Ended

June 30, 

June 30, 

2025

    

2024

    

2025

    

2024

 

(in thousands)

Service cost

$

889

$

858

$

1,748

$

1,719

 

Interest cost (1)

 

1,686

 

1,558

 

3,352

 

3,116

Net amortization (1)

 

232

 

839

 

464

 

1,678

Net periodic benefit cost

$

2,807

$

3,255

$

5,564

$

6,513

(1)Interest cost and net amortization are included in the Other income (expense) line item within our condensed consolidated statements of income.