XML 34 R23.htm IDEA: XBRL DOCUMENT v3.22.1
Business Segments (Tables)
 3 Months Ended
Mar. 31, 2022
Segment Reporting [Abstract]  
Segment Reporting Information The following tables present revenue, operating profit, depreciation expense and capital expenditures:
 THREE MONTHS ENDED
 MARCH 31
 2022 2021
Revenues
Coal Mining$20,962  $21,942 
NAMining21,404  17,939 
Minerals Management12,754 5,500 
Unallocated Items192 143 
Eliminations(289)(419)
Total$55,023  $45,105 
Operating profit (loss)   
Coal Mining$7,352  $8,157 
NAMining1,271  657 
Minerals Management11,628 4,235 
Unallocated Items(5,439)(4,773)
Eliminations132 54 
Total$14,944  $8,330 
Expenditures for property, plant and equipment and acquisition of mineral interests
Coal Mining$1,720 $1,617 
NAMining1,820 2,866 
Minerals Management833 393 
Unallocated Items276 — 
Total$4,649  $4,876 
Depreciation, depletion and amortization
Coal Mining$4,038 $4,155 
NAMining1,467 951 
Minerals Management578 447 
Unallocated Items44 32 
Total$6,127 $5,585