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EQUITY INVESTMENTS - Equity method (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 05, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Equity Investments        
Beginning balance   $ 49,371    
Contributions   2,518 $ 24,087  
Equity method investment income (loss)   (1,468) 5,634 $ 2,130
Other income (expense)   218 4,355 (2,966)
Ending balance   46,503 49,371  
All Dale Minerals III        
Equity Investments        
Beginning balance   25,284 26,325 27,268
Equity method investment income (loss)   2,567 5,634 2,130
Distributions received   (3,918) (6,675) (3,073)
Ending balance   23,933 25,284 $ 26,325
Francis Renewable Energy        
Equity Investments        
Beginning balance   20,000    
Contributions $ 20,000   20,000  
Equity method investment income (loss)   (3,513)    
Ending balance   16,487 20,000  
NGP ET IV        
Equity Investments        
Beginning balance   4,087    
Contributions   2,518 4,087  
Equity method investment income (loss)   (522)    
Ending balance   $ 6,083 $ 4,087