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Goodwill (Details) - USD ($)	12 Months Ended
Goodwill (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
No impairment identified	$ 0
Goodwill	357,586,000	$ 357,586,000
Electric
Goodwill [Line Items]
Goodwill	243,558,000	243,558,000
Natural gas
Goodwill [Line Items]
Goodwill	$ 114,028,000	$ 114,028,000

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.

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