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Subsequent Event (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 28, 2025	Sep. 30, 2025	Sep. 30, 2025
Subsequent Event [Line Items]
Proceeds from legal settlements		$ 14,710	$ 21,152
CWC
Subsequent Event [Line Items]
Proceeds from legal settlements		4,571	6,477
SJWC
Subsequent Event [Line Items]
Proceeds from legal settlements		10,078	14,497
MWC
Subsequent Event [Line Items]
Proceeds from legal settlements		61	178
Settlement payable to contract operators		$ 91	$ 91
Subsequent Event | PFAS Litigation Settlement
Subsequent Event [Line Items]
Proceeds from legal settlements	$ 3,762
Subsequent Event | CWC | PFAS Litigation Settlement
Subsequent Event [Line Items]
Proceeds from legal settlements	1,153
Subsequent Event | CWC | Senior Notes | 6.08% Senior Note, Series 2025
Subsequent Event [Line Items]
Aggregate principal amount	$ 60,000
Interest rate	6.08%
Subsequent Event | SJWC | PFAS Litigation Settlement
Subsequent Event [Line Items]
Proceeds from legal settlements	$ 2,542
Subsequent Event | MWC | PFAS Litigation Settlement
Subsequent Event [Line Items]
Proceeds from legal settlements	67
Settlement payable to contract operators	$ 52

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