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Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs
 9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs COMPONENTS OF COAL WORKERS’ PNEUMOCONIOSIS (CWP) AND WORKERS’ COMPENSATION NET PERIODIC BENEFIT COSTS:
The components of Net Periodic Benefit Cost are as follows:
CWPWorkers' Compensation
Three Months Ended
September 30,		Nine Months Ended
September 30,		Three Months Ended
September 30,		Nine Months Ended
September 30,
20242023202420232024202320242023
Service Cost$746 $578 $2,239 $1,734 $1,465 $1,400 $4,393 $4,198 
Interest Cost2,066 2,071 6,198 6,214 572 628 1,717 1,885 
Amortization of Actuarial Loss (Gain)109 (261)326 (784)(540)(512)(1,620)(1,537)
State Administrative Fees and Insurance Bond Premiums— — — — 464 471 1,393 1,482 
Net Periodic Benefit Cost$2,921 $2,388 $8,763 $7,164 $1,961 $1,987 $5,883 $6,028 
Expenses related to CWP and workers’ compensation are reflected in Operating and Other Costs in the Consolidated Statements of Income. Amounts reclassified out of accumulated other comprehensive (loss) income are reflected in Operating and Other Costs in the Consolidated Statements of Income.