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Segment Information
 12 Months Ended
Dec. 31, 2024
Segment Reporting [Abstract]  
Segment Information Segment Information
The Company identifies a business as an operating segment if: i) it engages in business activities from which it may earn revenues and incur expenses; ii) its operating results are regularly reviewed by the Chief Operating Decision Maker (“CODM”), who is the Company’s Chief Executive Officer, to make decisions about resources to be allocated to the segment and assess its performance; and iii) it has available discrete financial information. The Company has determined that its two underground mining operations are its operating segments. The CODM reviews financial information at the operating segment level to allocate resources and to assess the operating results and financial performance for each operating segment. Operating segments are aggregated into a reportable segment if the operating segments have similar quantitative economic characteristics and if the operating segments are similar in the following qualitative characteristics: i) nature of products and services; ii) nature of production processes; iii) type or class of customer for their products and services; iv) methods used to distribute the products or provide services; and v) if applicable, the nature of the regulatory environment.
The Company has determined that the two operating segments are similar in both quantitative and qualitative characteristics and thus the two operating segments have been aggregated into one reportable segment identified as Mining. The Company has determined that its natural gas and royalty businesses and the Blue Creek mine development did not meet the criteria in ASC 280 to be considered as operating or reportable segments. Therefore, the Company has included their results in an “all other” category as a reconciling item to consolidated amounts.
The Company does not allocate all of its assets, or its depreciation and depletion expense, selling, general and administrative expenses, other post-retirement benefits, transactions costs, restructuring costs, interest expense, reorganization items, net and income tax expense by segment.
The following tables include reconciliations of segment information to consolidated amounts (in thousands):
 For the years ended December 31,
202420232022
Revenues
Mining$1,499,980 1,647,992 $1,707,579 
All other25,240 28,633 31,159 
Total revenues$1,525,220 $1,676,625 $1,738,738 
Segment profit
Revenue$1,499,980 $1,647,992 $1,707,579 
Cash cost of sales (exclusive of depreciation and depletion)(1)
999,188 904,319 705,425 
Other segment items(2)
8,109 5,950 5,180 
Segment profit$492,683 $737,723 $996,974 
Assets
Mining$1,627,857 $1,819,179 $1,845,119 
All other963,659 537,879 182,976 
Total assets$2,591,516 $2,357,058 $2,028,095 
Depreciation and depletion
Mining$145,229 $120,192 $108,484 
All other8,753 7,164 6,795 
Total depreciation and depletion$153,982 $127,356 $115,279 
Capital Expenditures
Mining$96,784 $168,238 $151,194 
All other360,437 323,436 54,048 
Total capital expenditures$457,221 $491,674 $205,242 

(1) The significant expense category and amounts align with the segment-level information that is regularly reviewed by the CODM.
(2) Other segment items include non-cash charges to cost of sales (exclusive of depreciation and depletion) of asset retirement obligation accretion and valuation adjustments and stock compensation expense.
The Company evaluates the performance of its segment based on Segment Adjusted EBITDA, which is defined as net income adjusted for other revenues, cost of other revenues, depreciation and depletion, selling, general and administrative, other postretirement benefits, and certain transactions or adjustments that the CODM does not consider for the purposes of making decisions to allocate resources among segments or assessing segment performance. Segment Adjusted EBITDA should not be considered as an alternative to cost of sales under GAAP and may not be comparable to other similarly titled measures used by other companies. Below is a reconciliation of Segment Adjusted EBITDA to net income, which is its most directly comparable financial measure calculated and presented in accordance with GAAP (in thousands): 
 For the years ended December 31,
202420232022
Segment Adjusted EBITDA$492,683 $737,723 $996,974 
Other revenues25,240 28,633 31,159 
Cost of other revenues(45,449)(37,486)(27,047)
Depreciation and depletion(153,982)(127,356)(115,279)
Selling, general and administrative(63,078)(51,817)(48,791)
Business interruption(524)(8,291)(23,455)
Idle mine— — (12,137)
Loss on early extinguishment of debt— (11,699)— 
Other (expense) income— (1,027)675 
Interest income33,047 40,699 12,438 
Interest expense(4,271)(17,960)(31,433)
Income before income taxes283,666 551,419 783,104 
Income tax expense(33,063)(72,790)(141,806)
Net income $250,603 $478,629 $641,298