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SEGMENT INFORMATION - EBITDA Expense Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Reconciliation of consolidated Segment Adjusted EBITDA Expense |  |  |  |
Litigation expense accrual |  |  | $ (15,250) |
Outside coal purchases | $ 10,608 | $ 4,209 | 19,720 | $ 4,209
Other expense (income) | 958 | (177) | 1,564 | 396
Segment Adjusted EBITDA Expense | 363,171 | 338,434 | 721,498 | 677,730
Product |  |  |  |
Reconciliation of consolidated Segment Adjusted EBITDA Expense |  |  |  |
Operating expenses (excluding depreciation, depletion and amortization) | $ 351,605 | $ 334,402 | $ 715,464 | $ 673,125

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- Definition Segment Adjusted EBITDA Expense (a non-GAAP financial measure) includes operating expenses, coal purchases, if applicable, and other income or expense as adjusted to remove certain items from operating expenses that are characterized as unrepresentative of ongoing operations. + References No definition available. + Details
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- Definition Cost of product sold and service rendered, excluding depreciation, depletion, and amortization. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(a)) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(d)) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
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