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v3.22.4

Property, Plant and Equipment, Net | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment, Net [Abstract] |
Property, Plant and Equipment, Net | Property, Plant and Equipment, Net Property, plant and equipment, net includes the following:
| December 31
| 2022 |  | 2021
Coal lands and real estate | $ | 60,277 |  |  | $ | 52,011 |
Mineral interests | 31,436 |  |  | 19,512 |
Plant and equipment | 290,511 |  |  | 264,110 |
Property, plant and equipment, at cost | 382,224 |  |  | 335,633 |
Less allowances for depreciation, depletion and amortization | 164,272 |  |  | 142,466 |
| $ | 217,952 |  |  | $ | 193,167 |
Total depreciation, depletion and amortization expense on property, plant and equipment was $23.1 million and $19.5 million during 2022 and 2021, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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