Fair Value Measurements - Schedule of Significant Unobservable Inputs Used to Value Level 3 Instruments (Details) $ in Thousands	Mar. 31, 2026 USD ($) $ / MWh $ / MMBTU	Dec. 31, 2025 USD ($) $ / MWh $ / MMBTU
Commodity Contracts
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Derivative asset	$ 854	$ 8,387
Derivative liability	61,637	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	0	0
Derivative liability	33,456	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	$ 26,789	$ 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	31.79	41.51
Derivative asset, measurement input | $ / MWh	31.79	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	138.31	149.37
Derivative asset, measurement input | $ / MWh	138.31	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	71.57	80.20
Derivative asset, measurement input | $ / MWh	71.57	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	$ 0	$ 0
Derivative liability	$ 6,667	$ 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	(0.79)	(0.07)
Derivative asset, measurement input | $ / MMBTU	(0.79)	(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	0.14	0.36
Derivative asset, measurement input | $ / MMBTU	0.14	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	0.03	0.04
Derivative asset, measurement input | $ / MMBTU	0.03	0.04