Acquisitions and Divestitures (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 222,880	$ 191,187
Operating Income (Loss)	54,865	51,597
Unregulated Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Income (Loss)	20,046	18,983
Regulated Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Income (Loss)	34,681	$ 32,637
Diversified Energy | Unregulated Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	23,100
Revenues	10,400
Operating Income (Loss)	$ 1,500
Number of customers acquired through acquisition	19,000
Business Combination, Consideration Transferred	$ 37,500
Business Combination, Working Capital	1,700
Business Combination, Contingent Consideration, Liability	2,100
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	5,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 6,200
Gallons acquired through acquisition	10,000,000
Business Acquisition, Preacquisition Contingency, Amount of Settlement	$ 800