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Derivative Instruments - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) MWh	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
BVESI
Derivative Instruments, Gain (Loss) [Line Items]
Description of derivative activity volume | MWh	283,665
Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	$ 8,100
Commodity Contract | BVESI
Derivative Instruments, Gain (Loss) [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	$ 8,114	$ 7,020	$ 4,441	$ 2,810	$ 1,224	$ (1,537)
Minimum | Commodity Contract | BVESI
Derivative Instruments, Gain (Loss) [Line Items]
Term of derivative contract	3 years
Maximum | Commodity Contract | BVESI
Derivative Instruments, Gain (Loss) [Line Items]
Term of derivative contract	5 years

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- Definition

Derivative Activity Volume

+ References

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- Definition

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+ References

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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

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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-Publisher FASB
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-Topic 820
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-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258

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