v3.26.1
COMMITMENTS AND CONTINGENCIES (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 20, 2023
USD ($)
Mar. 04, 2022
USD ($)
Jul. 16, 2021
USD ($)
Jul. 15, 2021
USD ($)
Nov. 05, 2018
item
Feb. 29, 2024
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
COMMITMENTS AND CONTINGENCIES                    
Royalty expense             $ 7,300,000 $ 7,000,000 $ 12,400,000 $ 12,700,000
Accrued amount             0   0  
Payments to acquire property, plant, and equipment           $ 3,000,000        
Number of raw coal storage silos, failure | item         1          
Number of raw coal storage silos | item         3          
Percentage of structural failure         80.00%          
Compensatory damages $ 7,700,000 $ 1,800,000 $ 25,000,000 $ 7,700,000            
Award to cover inconvenience and aggravation $ 25,000,000                  
Total loss recovery asset             4,800,000   4,800,000  
Maximum                    
COMMITMENTS AND CONTINGENCIES                    
Additional loss recovery asset             100,000      
Corresponding reduction             100,000      
Surety Bond                    
COMMITMENTS AND CONTINGENCIES                    
Asset retirement obligation             38,000,000   38,000,000  
Take-or-pay Purchase Commitments                    
COMMITMENTS AND CONTINGENCIES                    
Total commitment                 17,100,000  
Commitment             12,300,000   12,300,000  
Environmental Restoration Costs                    
COMMITMENTS AND CONTINGENCIES                    
Regulatory liability             0   0  
Environmental Issue                    
COMMITMENTS AND CONTINGENCIES                    
Environmental liabilities             $ 0   $ 0