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Fair Value Measurements - Significant Unobservable Inputs Used to Value Level 3 Instruments (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) $ / MWh $ / MMBTU | Dec. 31, 2023 USD ($) $ / MMBTU $ / MWh
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets, Fair Value Disclosure | $ 1,614,173 | $ 1,570,845
Level 3 |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets, Fair Value Disclosure | 238 | 6,616
Commodity Contracts | Level 3 | Forward Contracts |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets, Fair Value Disclosure | 238 | 6,616
Liabilities, Fair Value Disclosure | $ 21,878 | $ 1,695
Commodity Contracts | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Minimum |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Electricity forward price (in usd per MWh) | $ / MWh | 25.27 | 37.79
Natural gas forward price (in usd per MMBTu) | $ / MMBTU | (0.10) | 0.00
Commodity Contracts | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Maximum |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Electricity forward price (in usd per MWh) | $ / MWh | 240.98 | 259.04
Natural gas forward price (in usd per MMBTu) | $ / MMBTU | 0 | 0.08
Commodity Contracts | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Weighted-Average |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Electricity forward price (in usd per MWh) | $ / MWh | 142.10 | 158.08
Natural gas forward price (in usd per MMBTu) | $ / MMBTU | (0.04) | 0.03
Commodity Option | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Minimum |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Electricity forward price (in usd per MWh) | $ / MWh | 43.90 |
Electricity price volatilities | 2.35 |
Natural gas price volatilities | 0.65 |
Commodity Option | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Maximum |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Electricity forward price (in usd per MWh) | $ / MWh | 68.60 |
Electricity price volatilities | 3.84 |
Natural gas price volatilities | 0.86 |
Commodity Option | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow | Weighted-Average |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Electricity forward price (in usd per MWh) | $ / MWh | 53.66 |
Electricity price volatilities | 2.96 |
Natural gas price volatilities | 0.78 |
Electricity | Commodity Contracts | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets, Fair Value Disclosure | $ 238 | $ 6,587
Liabilities, Fair Value Disclosure | 19,228 | 658
Electricity | Commodity Option | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets, Fair Value Disclosure | 0 |
Liabilities, Fair Value Disclosure | 573 |
Natural Gas | Commodity Contracts | Level 3 | Forward Contracts | Valuation Technique, Discounted Cash Flow |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets, Fair Value Disclosure | 0 | 29
Liabilities, Fair Value Disclosure | $ 2,077 | $ 1,037

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