v3.26.1
REVENUE (Details)
T in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
T
$ / T
Dec. 31, 2024
Dec. 31, 2023
REVENUES      
Term of domestic sales contracts 1 year    
Increase to revenue | $ $ 0.1    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01      
REVENUES      
Percentage expected to be satisfied 97.00%    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year    
INDIA      
REVENUES      
Percentage of Sales   11.00%  
GERMANY      
REVENUES      
Percentage of Sales 11.00% 10.00% 14.00%
CANADA      
REVENUES      
Percentage of Sales     14.00%
BRAZIL      
REVENUES      
Percentage of Sales     10.00%
Fixed Priced Contracts      
REVENUES      
Outstanding performance obligation, mass 1.1    
Average per ton | $ / T 142    
Contracts with indexed based pricing mechanisms      
REVENUES      
Outstanding performance obligation, mass 1.2    
Foreign Coal Revenues      
REVENUES      
Percentage of Sales 10.00%