Fair Value Measurements - Schedule of Significant Unobservable Inputs Used to Value Level 3 Instruments (Details) $ in Thousands	Jun. 30, 2026 USD ($) $ / MMBTU $ / MWh	Dec. 31, 2025 USD ($) $ / MMBTU $ / MWh
Commodity Contracts
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative asset	$ 5	$ 8,387
Derivative liability	81,127	36,636
Commodity Contracts \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative asset	268	0
Derivative liability	33,130	23,710
Electricity Forward Contract \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative asset	0	0
Derivative liability	$ 23,980	$ 21,913
Electricity Forward Contract \| Minimum \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative liability, measurement input \| $ / MWh	42.50	41.51
Derivative asset, measurement input \| $ / MWh	42.50	41.51
Electricity Forward Contract \| Maximum \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative liability, measurement input \| $ / MWh	91.17	149.37
Derivative asset, measurement input \| $ / MWh	91.17	149.37
Electricity Forward Contract \| Weighted Average \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative liability, measurement input \| $ / MWh	62.82	80.20
Derivative asset, measurement input \| $ / MWh	62.82	80.20
Natural Gas Forward Contract \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative asset	$ 268	$ 0
Derivative liability	$ 9,150	$ 1,797
Natural Gas Forward Contract \| Minimum \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative liability, measurement input \| $ / MMBTU	(0.59)	(0.07)
Derivative asset, measurement input \| $ / MMBTU	(0.59)	(0.07)
Natural Gas Forward Contract \| Maximum \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative liability, measurement input \| $ / MMBTU	0.26	0.36
Derivative asset, measurement input \| $ / MMBTU	0.26	0.36
Natural Gas Forward Contract \| Weighted Average \| Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative liability, measurement input \| $ / MMBTU	(0.02)	0.04
Derivative asset, measurement input \| $ / MMBTU	(0.02)	0.04