Acquisitions and Divestitures (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 139,470	$ 111,082	$ 362,350	$ 302,268
Operating Income (Loss)	26,469	22,578	81,334	74,175
Unregulated Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Income (Loss)	560	(465)	20,613	18,575
Regulated Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Income (Loss)	25,841	$ 22,760	60,539	$ 55,466
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		23,100
Revenues	4,000		14,300
Operating Income (Loss)	(800)		$ 700
Number of customers acquired through acquisition			19,000
Business Combination, Consideration Transferred			$ 37,500
Business Combination, Working Capital	1,700		1,700
Business Combination, Contingent Consideration, Liability	2,100		2,100
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	5,900		5,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	6,200		$ 6,200
Gallons acquired through acquisition			10,000,000
Business Acquisition, Preacquisition Contingency, Amount of Settlement	800		$ 800
Davenport 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	1,500		$ 1,500
Number of customers acquired through acquisition			850
Business Combination, Consideration Transferred			$ 2,000
Business Combination, Working Capital	100		100
Business Combination, Contingent Consideration, Liability	100		100
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 500		$ 500
Gallons acquired through acquisition			400,000