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SEGMENT INFORMATION - EBITDA Expense Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Reconciliation of consolidated Segment Adjusted EBITDA Expense to operating expenses (excluding depreciation, depletion and amortization) |  |  |  |
Segment Adjusted EBITDA Expense | $ 187,541 | $ 319,597 | $ 422,239 | $ 622,454
Outside coal purchases |  | (5,311) |  | (5,311)
Other expense | (377) | (13) | (733) | (142)
Operating expenses (excluding depreciation, depletion and amortization) | $ 187,164 | $ 314,273 | $ 421,506 | $ 617,001

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- Definition Costs incurred during the reporting period for purchased coal. + References No definition available. + Details
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- Definition Represents the segment adjusted EBITDA expense, including operating expenses, coal purchases and other income. Excludes transportation expenses. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(a)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(d)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- References No definition available. + Details
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