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Summary of Significant Accounting Policies - Summary of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Balance as of December 31, 2020 and 2021	$ 52,426	$ 52,426
Alaska Electric Light & Power [Member]
Goodwill [Line Items]
Balance as of December 31, 2020 and 2021	52,426
Accumulated Impairment Losses [Member]
Goodwill [Line Items]
Balance as of December 31, 2020 and 2021	$ 0

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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+ References

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