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Fair Value Measurements - Significant Unobservable Inputs (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) $ / MMBTU $ / MWh | Dec. 31, 2021 USD ($) $ / MMBTU
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets | $ 1,552,870 | $ 1,763,556
Liabilities | 42,446 |
Level 3 |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets | 26,132 | 0
Liabilities | 31,020 |
Level 3 | Forward Contracts | Commodity Contracts |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets | 26,132 | 0
Liabilities | $ 31,020 | $ 2,738
Level 3 | Forward Contracts | Discounted Cash Flows | Commodity Contracts | 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 | 163.92 |
Natural gas forward price (in usd per MMBTu) | $ / MMBTU | (5.08) | (0.71)
Level 3 | Forward Contracts | Discounted Cash Flows | Commodity Contracts | 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 | 37.79 |
Natural gas forward price (in usd per MMBTu) | $ / MMBTU | (11.81) | 0.76
Level 3 | Forward Contracts | Discounted Cash Flows | Commodity Contracts | 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 | 310.69 |
Natural gas forward price (in usd per MMBTu) | $ / MMBTU | 0.00 | 0.65
Level 3 | Forward Contracts | Discounted Cash Flows | Electricity: | Commodity Contracts |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets | $ 26,132 |
Liabilities | 1,759 |
Level 3 | Forward Contracts | Discounted Cash Flows | Natural Gas: | Commodity Contracts |  |
Information regarding the entity's internally developed significant unobservable inputs used to value its level 3 instruments |  |
Assets | 0 | $ 0
Liabilities | $ 29,261 | $ 2,738

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