Reportable Segments - Depreciation and amortization expense by segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Depreciation and amortization expense by segment
Depreciation and amortization	$ 95,522	$ 107,041	$ 99,157
Operating Segment | Utilities
Depreciation and amortization expense by segment
Depreciation and amortization	60,863	70,916	71,520
Operating Segment | Energy
Depreciation and amortization expense by segment
Depreciation and amortization	29,073	31,377	24,657
Corporate and non-allocated costs
Depreciation and amortization expense by segment
Depreciation and amortization	$ 5,586	$ 4,748	$ 2,980