Business Segments (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Segment Reporting Information

The following tables present revenue, operating profit, depreciation expense and capital expenditures:

	THREE MONTHS ENDED				SIX MONTHS ENDED
	JUNE 30				JUNE 30
	2021		2020		2021		2020
Revenues
Coal Mining	$	23,063	$	21,573	$	46,802	$	42,501
NAMining	17,486		12,048		33,628		23,672
Minerals Management	5,608		1,987		11,108		7,228
Unallocated Items	910		327		1,053		353
Eliminations	(1,171)		(580)		(1,590)		(755)
Total	$	45,896	$	35,355	$	91,001	$	72,999
Operating profit (loss)
Coal Mining	$	8,542	$	7,498	$	17,226	$	14,683
NAMining	783		544		913		1,275
Minerals Management	4,173		510		8,408		4,777
Unallocated Items	(4,795)		(4,158)		(9,568)		(8,718)
Eliminations	(33)		88		21		45
Total	$	8,670	$	4,482	$	17,000	$	12,062

Expenditures for property, plant and equipment and acquisition of mineral interests
Coal Mining	$	3,115	$	3,844	$	4,732	$	4,667
NAMining	2,952		3,163		5,818		7,186
Minerals Management	5,105		276		5,498		739
Unallocated Items	79		158		79		207
Total	$	11,251	$	7,441	$	16,127	$	12,799
Depreciation, depletion and amortization
Coal Mining	$	4,127	$	3,615	$	8,334	$	7,158
NAMining	930		652		1,829		1,298
Minerals Management	522		327		969		654
Unallocated Items	38		30		70		58
Total	$	5,617	$	4,624	$	11,202	$	9,168