Business Segments (Tables)

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Schedule of Revenue by Major Customers by Reporting Segments

The following represents the revenue attributable to each of these entities as a percentage of consolidated revenue for those years:

	Percentage of Consolidated Revenue
Segment	2025		2024
Utility Coal Mining customer	32	%	29	%
Contract Mining customer	25	%	24	%
Contract Mining customer	10	%	11	%

Schedule of Segment Reporting Information

The following tables provide segment financial information and a reconciliation of segment results to consolidated results for the years ended December 31:

	2025		2024
Revenues
Utility Coal Mining	$	88,188	$	68,611
Contract Mining	140,013		119,600
Minerals and Royalties	37,630		34,579
Unallocated Items	15,080		17,707
Eliminations	(3,713)		(2,789)
Total	$	277,198	$	237,708
Cost of sales
Utility Coal Mining	$	94,155	$	79,375
Contract Mining	129,876		110,821
Minerals and Royalties	5,666		5,234
Unallocated Items	12,654		15,323
Eliminations	(3,626)		(2,801)
Total	$	238,725	$	207,952
Earnings of unconsolidated operations
Utility Coal Mining	$	54,471	$	51,821
Contract Mining	4,789		5,010
Minerals and Royalties	2,571		647
Unallocated Items	(8)		(2)
Total	$	61,823	$	57,476
Operating expenses*
Utility Coal Mining	$	31,349	$	30,358
Contract Mining	9,159		8,017
Minerals and Royalties	5,427		1,065
Unallocated Items	32,380		25,699
Total	$	78,315	$	65,139

*Operating expenses consist of Selling, general and administrative expenses, Amortization of intangible assets and Gain on sale of assets.

	2025		2024
Operating profit (loss)
Utility Coal Mining	$	17,155	$	24,311
Contract Mining	5,767		5,772
Minerals and Royalties	29,108		28,927
Unallocated Items	(29,962)		(23,317)
Eliminations	(87)		12
Total	$	21,981	$	35,705
Expenditures for property, plant and equipment and acquisition of mineral interests
Utility Coal Mining	$	8,020	$	8,292
Contract Mining	31,968		30,556
Minerals and Royalties	7,710		1,079
Unallocated Items	5,588		15,492
Total	$	53,286	$	55,419
Depreciation, depletion and amortization
Utility Coal Mining	$	8,815	$	9,476
Contract Mining	10,854		9,811
Minerals and Royalties	4,579		4,273
Unallocated Items	1,029		1,092
Total	$	25,277	$	24,652
Total assets
Utility Coal Mining	$	125,715	$	125,301
Contract Mining	213,571		204,889
Minerals and Royalties	115,545		99,905
Unallocated Items**	206,397		201,592
Total	$	661,228	$	631,687

**Unallocated Items consist primarily of Cash and cash equivalents, assets of growth businesses, Deferred income taxes and Investments in unconsolidated subsidiaries.