Fair Value Measurements - Significant Unobservable Inputs Used to Value Level 3 Instruments (Details 2) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025 USD ($) $ / MWh $ / MMBTU	Dec. 31, 2024 USD ($) $ / MMBTU $ / MWh
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	$ 1,810,450	$ 1,707,783
Level 3
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments
Assets	1,189	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	1,189	7,176
Liabilities	$ 24,029	$ 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 MWh) \| $ / MWh	26.23	25.25
Natural gas forward price (per MMBtu) \| $ / MMBTU	1.92	(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 MWh) \| $ / MWh	151.56	151.11
Natural gas forward price (per MMBtu) \| $ / MMBTU	0.09	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 MWh) \| $ / MWh	90.74	106.06
Natural gas forward price (per MMBtu) \| $ / MMBTU	0.02	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	$ 703	$ 708
Liabilities	23,218	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	486	6,468
Liabilities	$ 811	$ 325