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Derivative Instruments - Commodity derivatives (Details)
Jun. 30, 2025
MMBTU / d
derivative
$ / MMBTU
Mar. 31, 2025
derivative
VIE, Martica    
Derivative Instruments    
Number of derivative instruments | derivative 0 0
Natural gas | Henry Hub | July-December 2025    
Derivative Instruments    
Contracted volume | MMBTU / d 100,000  
Weighted average price 3.12  
Natural gas | Henry Hub | January-December 2026    
Derivative Instruments    
Contracted volume | MMBTU / d 500,000  
Natural gas | Henry Hub | January-December 2026 | Weighted average    
Derivative Instruments    
Ceiling price 6.31  
Floor price 3.14  
Call option and embedded put option | Natural gas | Henry Hub | July-December 2025    
Derivative Instruments    
Contracted volume | MMBTU / d 44,000  
Call option and embedded put option | Natural gas | Henry Hub | January-December 2026    
Derivative Instruments    
Contracted volume | MMBTU / d 32,000  
Call option and embedded put option | Natural gas | Put option | Henry Hub | July-December 2025    
Derivative Instruments    
Strike price 2.564  
Call option and embedded put option | Natural gas | Put option | Henry Hub | January-December 2026    
Derivative Instruments    
Strike price 2.629  
Call option and embedded put option | Natural gas | Call Option | Henry Hub | July-December 2025    
Derivative Instruments    
Strike price 2.564  
Call option and embedded put option | Natural gas | Call Option | Henry Hub | January-December 2026    
Derivative Instruments    
Strike price 2.629