v3.25.4
Segment Information - Schedule of Reconciliations of Segment Information to Consolidated Amounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information [Line Items]      
Total revenues $ 1,310,043 $ 1,525,220 $ 1,676,625
Operating income 45,709 254,890 541,406
Assets 2,783,799 2,591,516  
Depreciation and depletion 188,565 153,982 127,356
Operating Segments      
Segment Reporting Information [Line Items]      
Total revenues 1,310,043 1,525,220 1,676,625
Transportation and royalties 333,042 367,059 368,212
Assets 2,783,799 2,591,516 2,357,058
Depreciation and depletion 188,565 153,982 127,356
Capital expenditures 320,261 457,221 491,674
Mining      
Segment Reporting Information [Line Items]      
Depreciation and depletion 188,565 153,982 127,356
Mining | Operating Segments      
Segment Reporting Information [Line Items]      
Total revenues 1,277,024 1,499,980 1,647,992
Cash cost of sales [1] 975,384 999,188 904,319
Other segment items [2] 7,017 8,109 5,950
Operating income 294,623 492,683 737,723
Transportation and royalties 333,042 367,059 367,949
Assets 2,632,118 2,456,973 2,220,771
Depreciation and depletion 180,067 145,229 120,192
Capital expenditures 315,258 450,713 484,730
All other | Operating Segments      
Segment Reporting Information [Line Items]      
Total revenues 33,019 25,240 28,633
Transportation and royalties 263
Assets 151,681 134,543 136,287
Depreciation and depletion 8,498 8,753 7,164
Capital expenditures $ 5,003 $ 6,508 $ 6,944
[1] The significant expense category and amounts align with the segment-level information that is regularly reviewed by the CODM. Cash cost of sales includes transportation and royalties and excludes depreciation and depletion as presented above.
[2] Other segment items include non-cash charges to cost of sales of asset retirement obligation accretion and valuation adjustments and stock compensation expense.