Acquisitions and Divestitures (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Acquisitions - Additional Information [Line Items]
Revenues	$ 160,138,000	$ 131,547,000	$ 572,154,000	$ 485,269,000
Operating Income (Loss)	40,918,000	20,228,000	$ 161,293,000	$ 103,488,000
Number of Miles of Distribution Mains			150	160
Transaction-related expenses	819,000	3,899,000	$ 3,114,000	$ 3,899,000
Total operating income	40,918,000	20,228,000	161,293,000	103,488,000
Business Combination, Acquisition Related Costs				15,900,000
Transaction-related expenses						$ 4,100,000
Proceeds from Issuance of Senior Long-Term Debt			550,000,000.0
Equity Issued in Business Combination, Fair Value Disclosure					$ 366,400,000
Unregulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Operating Income (Loss)	(3,061,000)	(4,723,000)	18,606,000	11,529,000
Total operating income	(3,061,000)	(4,723,000)	18,606,000	11,529,000
Regulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Operating Income (Loss)	43,935,000	24,912,000	142,549,000	91,828,000
Total operating income	43,935,000	$ 24,912,000	142,549,000	91,828,000
J.T. Lee and Son's
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	2,700,000		$ 2,700,000
Number of customers acquired through acquisition			3,000
Business Combination, Consideration Transferred			$ 3,900,000
Business Combination, Working Capital	200,000		200,000
Business Combination, Contingent Consideration, Liability	300,000		300,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	900,000		900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	100,000		$ 100,000
Gallons acquired through acquisition			800,000
Acquisitions - Additional Information [Line Items]
Number of customers acquired through acquisition			3,000
Business Combination, Consideration Transferred			$ 3,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	2,700,000		2,700,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	900,000		900,000
Business Combination, Contingent Consideration, Liability	300,000		$ 300,000
Gallons acquired through acquisition			800,000
Business Combination, Working Capital	200,000		$ 200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	100,000		$ 100,000
Bulk Plant Storage Acquired Through Acquisition			60,000
Florida City Gas
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						454,410,000
Number of customers acquired through acquisition			120,000
Business Combination, Consideration Transferred			$ 922,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables						14,138,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities						35,619,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						460,875,000
Acquisitions - Additional Information [Line Items]
Number of customers acquired through acquisition			120,000
Business Combination, Consideration Transferred			$ 922,800,000
Number of Miles of Distribution Mains			3,800
Number of Miles of Transmission Pipe			80
Transaction-related expenses	800,000		$ 3,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents						2,261,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables						14,138,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Regulatory assets - current						2,983,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other						2,082,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						454,410,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						460,875,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Regulatory assets - noncurrent						3,381,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets						18,309,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets						958,439,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities						(20,934,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Regulatory liabilities - noncurrent						(14,137,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other						(548,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities						35,619,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						$ 922,820,000
Business Combination, Integration Related Costs				$ 10,400,000
Florida City Gas | Regulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Revenues	33,400,000		101,800,000
Operating Income (Loss)	3,900,000		9,900,000
Bridge Loan	965,000,000		965,000,000
Total operating income	$ 3,900,000		$ 9,900,000