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Derivative Instruments (Details) - BVES $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) MWh | Dec. 31, 2022 USD ($)
Derivative instruments |  |
Derivative Activity Volume | MWh | 685,256 |
Changes in the fair value of the derivative |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | $ (2,400) |
Purchase power contract |  |
Changes in the fair value of the derivative |  |
Balance, at beginning of the period | 11,847 | $ 4,441
Unrealized (losses) gains on purchase power contracts | (14,207) | 7,406
Balance, at end of the period | $ (2,360) | $ 11,847
Minimum |  |
Derivative instruments |  |
Derivative, Term of Contract | 3 years |
Minimum | Purchase power contract |  |
Derivative instruments |  |
Derivative, Term of Contract | 3 years |
Maximum |  |
Derivative instruments |  |
Derivative, Term of Contract | 5 years |
Maximum | Purchase power contract |  |
Derivative instruments |  |
Derivative, Term of Contract | 5 years |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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