Fair Value Measurements - Significant Unobservable Inputs Used to Value Level 3 Instruments (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) $ / MWh $ / MMBTU	Dec. 31, 2023 USD ($) $ / MWh $ / MMBTU
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	$ 1,707,783	$ 1,570,845
Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	7,176	6,616
Level 3 | Forward Contracts | Commodity Contracts
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	7,176	6,616
Liabilities	$ 22,215	$ 1,695
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 MWh) | $ / MWh	25.25	37.79
Natural gas forward price (per MMBtu) | $ / MMBTU	0.89	0.00
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 MWh) | $ / MWh	151.11	259.04
Natural gas forward price (per MMBtu) | $ / MMBTU	1.47	0.08
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 MWh) | $ / MWh	106.06	158.08
Natural gas forward price (per MMBtu) | $ / MMBTU	0.71	0.03
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	$ 708	$ 6,587
Liabilities	21,890	658
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	6,468	29
Liabilities	$ 325	$ 1,037