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DERIVATIVE INSTRUMENTS - The Effect of Derivative Instruments on the Consolidated Statement of Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Derivative [Line Items]            
Realized Gain (Loss) on Commodity Derivative Instruments: $ 22,380 $ 94,663 $ (122,712) $ 259,397    
Unrealized Gain (Loss) on Commodity Derivative Instruments: 109,315 (5,699) 147,308 (148,810)    
Gain (Loss) on Commodity Derivative Instruments: 131,695 88,964 24,596 110,587    
Commodity Derivatives            
Derivative [Line Items]            
Derivative asset 18,362 30,891 18,362 30,891 $ 2,309 $ 6,741
Derivatives settled not paid         $ 23,212 $ 900
Interest Rate Swaps            
Derivative [Line Items]            
Gain (Loss) on Commodity Derivative Instruments: 0 0 0 4    
Cash Received in Settlement of Interest Rate Swaps 0 0 0 1,103    
Unrealized Loss on Interest Rate Swaps 0 0 0 (1,099)    
Natural Gas | Commodity Swap            
Derivative [Line Items]            
Realized Gain (Loss) on Commodity Derivative Instruments: 4,061 85,312 (125,872) 258,096    
Unrealized Gain (Loss) on Commodity Derivative Instruments: 234,645 69,688 154,522 (30,679)    
Gain (Loss) on Commodity Derivative Instruments: 238,706 155,000 28,650 227,417    
Natural Gas | Natural Gas Basis Swaps            
Derivative [Line Items]            
Realized Gain (Loss) on Commodity Derivative Instruments: 17,591 8,797 3,633 531    
Unrealized Gain (Loss) on Commodity Derivative Instruments: (125,257) (77,905) (9,292) (118,190)    
Gain (Loss) on Commodity Derivative Instruments: (107,666) (69,108) (5,659) (117,659)    
Natural Gas Liquids | Commodity Swap            
Derivative [Line Items]            
Realized Gain (Loss) on Commodity Derivative Instruments: 728 554 (473) 770    
Unrealized Gain (Loss) on Commodity Derivative Instruments: (73) 2,518 2,078 59    
Gain (Loss) on Commodity Derivative Instruments: $ 655 $ 3,072 $ 1,605 $ 829