v3.26.1
Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs (Tables)
 6 Months Ended
Jun. 30, 2026
Compensation Related Costs [Abstract]  
Schedule of Net Periodic Benefit Costs
The components of Net Periodic Benefit Cost were as follows:
Pension BenefitsOther Postretirement Benefits
Three Months Ended
June 30,		Six Months Ended
June 30,		Three Months Ended
June 30,		Six Months Ended
June 30,
20262025202620252026202520262025
Service Cost$300 $275 $600 $550 $28 $38 $57 $70 
Interest Cost5,729 6,343 11,459 12,685 2,347 2,987 4,694 5,892 
Expected Return on Plan Assets(7,479)(7,565)(14,958)(15,130)— — — — 
Amortization of Prior Service Credits— — — — (602)(601)(1,203)(1,202)
Recognized Net Actuarial Loss (Gain)2,467 2,158 4,935 4,316 (1,019)(685)(2,039)(1,369)
Net Periodic Benefit Cost$1,017 $1,211 $2,036 $2,421 $754 $1,739 $1,509 $3,391 
The components of Net Periodic Benefit Cost were as follows:
CWPWorkers' Compensation
Three Months Ended
June 30,		Six Months Ended
June 30,		Three Months Ended
June 30,		Six Months Ended
June 30,
20262025202620252026202520262025
Service Cost$1,691 $1,990 $3,381 $3,806 $3,195 $1,728 $6,390 $3,456 
Interest Cost3,381 3,670 6,763 7,089 501 555 1,002 1,110 
Recognized Net Actuarial Loss (Gain)318 43 635 85 (356)(460)(712)(920)
State Administrative Fees and Insurance Bond Premiums— — — — 795 740 1,561 1,130 
Net Periodic Benefit Cost$5,390 $5,703 $10,779 $10,980 $4,135 $2,563 $8,241 $4,776 
Insured Workers’ Compensation Fees and Assessments518 1,634 1,037 2,980 
Total Workers’ Compensation Expense$4,653 $4,197 $9,278 $7,756