Annual report [Section 13 and 15(d), not S-K Item 405]

COMMITMENTS AND CONTINGENCIES (Details)

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Millions
 12 Months Ended
Nov. 08, 2024
Oct. 21, 2024
Oct. 09, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2010
Contractual obligation bonds outstanding       $ 463.3      
Accrued Royalties       5.0      
Additional royalty due to disallowed deductions       4.7     $ 4.7
Estimated penalties       0.3      
Decommissioning obligations       16.4      
Additional decommissioning obligations       20.9      
Loss of decommissioning obligations       22.6      
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            
Minimum              
Contractual obligation, surety bonds subject to escalation       30.0      
Maximum              
Contractual obligation, surety bonds subject to escalation       70.0      
Security requirements for decommissioning obligations              
Expenses related to surety bonds paid       7.5 $ 7.4 $ 8.3  
Drilling Commitments              
Other commitment expense       9.9      
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            
Heidelberg Field              
Other commitment expense       $ 0.4 $ 1.0 $ 1.6