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Property, Plant and Equipment, Net | 12 Months Ended
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Dec. 31, 2023
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
| 2023 |  | 2022
Coal lands and real estate | $ | 58,353 |  |  | $ | 60,277 |
Mineral interests | 68,150 |  |  | 31,436 |
Plant and equipment | 325,655 |  |  | 290,511 |
Property, plant and equipment, at cost | 452,158 |  |  | 382,224 |
Less allowances for depreciation, depletion, amortization and impairment | 228,256 |  |  | 164,272 |
| $ | 223,902 |  |  | $ | 217,952 |
Total depreciation, depletion and amortization expense on property, plant and equipment was $26.4 million and $23.1 million during 2023 and 2022, respectively. During the fourth quarter of 2023, the Company recorded a non-cash, long-lived asset impairment charge of $65.9 million. See Note 9 for further discussion of the impairment charge.

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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://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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