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Business Segments | 9 Months Ended
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Sep. 30, 2021
Segment Reporting [Abstract] |
Business Segments | Business Segments The Company’s operating segments are: (i) Coal Mining, (ii) NAMining and (iii) Minerals Management. The Company determines its reportable segments by first identifying its operating segments, and then by assessing whether any components of these segments constitute a business for which discrete financial information is available and where segment management regularly reviews the operating results of that component. The Company’s Chief Operating Decision Maker utilizes operating profit to evaluate segment performance and allocate resources. The Company has items not directly attributable to a reportable segment that are not included as part of the measurement of segment operating profit, which include primarily administrative costs related to public company reporting requirements at the parent company and the financial results of Mitigation Resources and Bellaire. Mitigation Resources generates and sells stream and wetland mitigation credits (known as mitigation banking) and provides services to those engaged in permittee-responsible stream and wetland mitigation. Bellaire manages the Company’s long-term liabilities related to former Eastern U.S. underground mining activities. All financial statement line items below operating profit (other income including interest expense and interest income, the provision for income taxes and net income) are presented and discussed within this Form 10-Q on a consolidated basis. See Note 1 for additional discussion of the Company's reportable segments. The following tables present revenue, operating profit, depreciation expense and capital expenditures:
| THREE MONTHS ENDED |  | NINE MONTHS ENDED
| SEPTEMBER 30 |  | SEPTEMBER 30
| 2021 |  | 2020 |  | 2021 |  | 2020
Revenues |  |  |  |  |  |  |
Coal Mining | $ | 23,682 |  |  | $ | 20,395 |  |  | $ | 70,484 |  |  | $ | 62,896 |
NAMining | 17,693 |  |  | 9,443 |  |  | 51,321 |  |  | 33,115 |
Minerals Management | 10,607 |  |  | 2,722 |  |  | 21,715 |  |  | 9,950 |
Unallocated Items | 1,594 |  |  | 904 |  |  | 2,647 |  |  | 1,257 |
Eliminations | (1,834) |  |  | (1,169) |  |  | (3,424) |  |  | (1,924) |
Total | $ | 51,742 |  |  | $ | 32,295 |  |  | $ | 142,743 |  |  | $ | 105,294 |
Operating profit (loss) |  |  |  |  |  |  |
Coal Mining | $ | 23,121 |  |  | $ | 11,174 |  |  | $ | 40,347 |  |  | $ | 25,857 |
NAMining | 312 |  |  | 244 |  |  | 1,225 |  |  | 1,519 |
Minerals Management | 9,454 |  |  | 1,673 |  |  | 17,862 |  |  | 6,450 |
Unallocated Items | (5,170) |  |  | (3,623) |  |  | (14,738) |  |  | (12,341) |
Eliminations | (125) |  |  | (70) |  |  | (104) |  |  | (25) |
Total | $ | 27,592 |  |  | $ | 9,398 |  |  | $ | 44,592 |  |  | $ | 21,460 |
Expenditures for property, plant and equipment and acquisition of mineral interests |  |  |  |  |  |  |
Coal Mining | $ | 5,646 |  |  | $ | 3,150 |  |  | $ | 10,378 |  |  | $ | 7,817 |
NAMining | 13,309 |  |  | 3,220 |  |  | 19,127 |  |  | 10,406 |
Minerals Management | 450 |  |  | 633 |  |  | 5,948 |  |  | 1,372 |
Unallocated Items | 2 |  |  | — |  |  | 81 |  |  | 207 |
Total | $ | 19,407 |  |  | $ | 7,003 |  |  | $ | 35,534 |  |  | $ | 19,802 |
Depreciation, depletion and amortization |  |  |  |  |  |  |
Coal Mining | $ | 4,323 |  |  | $ | 3,793 |  |  | $ | 12,657 |  |  | $ | 10,951 |
NAMining | 1,014 |  |  | 723 |  |  | 2,843 |  |  | 2,021 |
Minerals Management | 423 |  |  | 327 |  |  | 1,392 |  |  | 981 |
Unallocated Items | 36 |  |  | 33 |  |  | 106 |  |  | 91 |
Total | $ | 5,796 |  |  | $ | 4,876 |  |  | $ | 16,998 |  |  | $ | 14,044 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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