Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 345,736,000	$ 345,736,000
Goodwill, impairment loss	0	0	$ 0
Natural gas distribution
Goodwill [Line Items]
Goodwill	$ 345,700,000	$ 345,700,000