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Derivative Instruments (Details) - Bear Valley Electric Service, Inc. $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) MWh	Dec. 31, 2020 USD ($)
Derivative instruments
Derivative Activity Volume | MWh	350,000
Changes in the fair value of the derivative
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	$ 4,400
Purchase power contract
Changes in the fair value of the derivative
Balance, at beginning of the period	1,537	$ 3,171
Unrealized gain on purchased power contracts	5,978	1,634
Balance, at end of the period	$ 4,441	$ 1,537
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

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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.

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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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.

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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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