Business Segments (Tables)

6 Months Ended

Jun. 30, 2024

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

The following table presents Revenues, Cost of sales, Earnings of unconsolidated operations, Operating expenses, Operating profit (loss), Expenditures for property, plant and equipment and acquisition of mineral interests and Depreciation, depletion and amortization expense:

	THREE MONTHS ENDED				SIX MONTHS ENDED
	JUNE 30				JUNE 30
	2024		2023		2024		2023
Revenues
Coal Mining	$	14,996	$	26,343	$	30,541	$	46,996
NAMining	27,920		21,716		52,403		42,349
Minerals Management	5,593		9,171		15,994		17,456
Unallocated Items	4,566		4,628		7,828		5,819
Eliminations	(730)		(508)		(1,132)		(1,129)
Total	$	52,345	$	61,350	$	105,634	$	111,491
Cost of sales
Coal Mining	$	16,138	$	33,269	$	37,081	$	59,147
NAMining	24,254		18,884		45,925		38,125
Minerals Management	1,501		910		2,865		1,962
Unallocated Items	4,167		2,375		6,879		3,589
Eliminations	(733)		(495)		(1,152)		(1,096)
Total	$	45,327	$	54,943	$	91,598	$	101,727
Earnings of unconsolidated operations
Coal Mining	$	12,006	$	9,962	$	24,013	$	22,428
NAMining	1,448		1,122		2,813		2,480
Minerals Management	138		—		73		—
Total	$	13,592	$	11,084	$	26,899	$	24,908
Operating expenses (income)*
Coal Mining	$	8,097	$	7,711	$	15,123	$	14,639
NAMining	2,029		1,740		3,851		3,660
Minerals Management	(3,361)		972		(2,319)		2,161
Unallocated Items	6,479		5,318		12,157		10,648
Total	$	13,244	$	15,741	$	28,812	$	31,108
Operating profit (loss)
Coal Mining	$	2,767	$	(4,675)	$	2,350	$	(4,362)
NAMining	3,085		2,214		5,440		3,044
Minerals Management	7,591		7,289		15,521		13,333
Unallocated Items	(6,080)		(3,065)		(11,208)		(8,418)
Eliminations	3		(13)		20		(33)
Total	$	7,366	$	1,750	$	12,123	$	3,564

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

	THREE MONTHS ENDED				SIX MONTHS ENDED
	JUNE 30				JUNE 30
	2024		2023		2024		2023
Expenditures for property, plant and equipment and acquisition of mineral interests
Coal Mining	$	1,913	$	1,032	$	3,707	$	3,718
NAMining	5,168		4,507		10,986		8,930
Minerals Management	10		638		146		982
Unallocated Items	827		79		7,562		505
Total	$	7,918	$	6,256	$	22,401	$	14,135
Depreciation, depletion and amortization
Coal Mining	$	2,896	$	4,348	$	5,110	$	8,588
NAMining	2,434		1,855		4,690		3,741
Minerals Management	1,323		749		2,316		1,560
Unallocated Items	354		138		583		220
Total	$	7,007	$	7,090	$	12,699	$	14,109