Acquisitions and Divestitures (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)
Acquisitions - Additional Information [Line Items]
Revenues	$ 192,800	$ 166,300	$ 491,500	$ 412,000
Operating Income (Loss)	50,300	40,800	$ 137,100	$ 120,400
Number of Miles of Distribution Mains			150	160
Transaction-related expenses	500	1,400	$ 800	$ 2,300
Total operating income	50,300	40,800	137,100	120,400
Unregulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Revenues	47,900	41,400	154,600	124,500
Operating Income (Loss)	(1,500)	400	24,800	21,800
Total operating income	(1,500)	400	24,800	21,800
Regulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Revenues	151,800	130,700	351,400	299,100
Operating Income (Loss)	51,800	40,500	112,300	98,600
Total operating income	$ 51,800	$ 40,500	$ 112,300	$ 98,600