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Goodwill - Narrative (Details) $ in Thousands		1 Months Ended		9 Months Ended
	Jul. 08, 2025 waterSystem	Jul. 31, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2025 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill reclassified to regulatory assets			$ (3,000)	$ (2,959)
Goodwill, acquired during period		$ 200		$ 229
Tucson Water | GW-Ocotillo
Business Combination [Line Items]
Number of water systems acquired | waterSystem	7

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