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Derivative Instruments (Details) - BVES $ in Thousands	12 Months Ended
	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

Derivative Activity Volume

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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
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-Publisher FASB
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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

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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.

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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
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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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- Definition

Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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