Fair Value Measurements - Schedule of Significant Unobservable Inputs Used to Value Level 3 Instruments (Details 2) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($) $ / MMBTU $ / MWh	Dec. 31, 2024 USD ($) $ / MWh $ / MMBTU
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	$ 1,845,615	$ 1,707,783
Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	1,369	7,176
Level 3 | Forward Contracts | Commodity Contracts
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	1,369	7,176
Liabilities	$ 19,645	$ 22,215
Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Commodity Contracts | Minimum
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Electricity forward price (per megawatt-hour (“MWh”)) | $ / MWh	30.85	25.25
Natural gas forward price (per Million British Thermal Units (“MMBtu”)) | $ / MMBTU	0.48	(0.89)
Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Commodity Contracts | Maximum
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Electricity forward price (per megawatt-hour (“MWh”)) | $ / MWh	157.99	151.11
Natural gas forward price (per Million British Thermal Units (“MMBtu”)) | $ / MMBTU	0.1	1.47
Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Commodity Contracts | Weighted Average
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Electricity forward price (per megawatt-hour (“MWh”)) | $ / MWh	80.98	106.06
Natural gas forward price (per Million British Thermal Units (“MMBtu”)) | $ / MMBTU	(0.09)	0.71
Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Electricity: | Commodity Contracts
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	$ 1,032	$ 708
Liabilities	17,576	21,890
Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Natural Gas: | Commodity Contracts
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	337	6,468
Liabilities	$ 2,069	$ 325