Quarterly report [Sections 13 or 15(d)]

COMMITMENTS AND CONTINGENCIES (Details)

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 08, 2024
Oct. 21, 2024
Oct. 09, 2024
Mar. 31, 2025
Dec. 31, 2010
Accrued Royalties       $ 5.0  
Additional royalty due to disallowed deductions       4.7 $ 4.7
Estimated penalties       0.3  
Decommissioning obligations       1.4  
Increase (decrease) in decommissioning obligation accrual       (0.2)  
Accrual for decommissioning obligations       $ 21.4  
The Sureties          
Surety bonds issued $ 183.7        
Philadelphia Indemnity Insurance Company          
Surety bonds issued 71.0        
The Sureties and PIIC          
Surety bonds issued 254.7        
Surety Bonds          
Surety bonds issued   $ 111.0 $ 55.0    
Cancelled bonds     13.1    
Cash collateral   $ 23.0 $ 55.0    
Surety Bonds | Applied litigation          
Surety bonds issued 11.3        
Cash collateral 11.3        
Unpaid in loss contingency 0.4        
Surety Bonds | U.S. Fire Litigation          
Surety bonds issued 93.5        
Cash collateral $ 93.5