Subsequent Event (Details) - Subsequent Event - San Jose Water Company - 4.85% Senior Note, Series P - Senior Notes $ in Thousands	Jul. 14, 2022 USD ($)
Subsequent Event [Line Items]
Aggregate principal amount	$ 70,000
Interest rate	4.85%

Face (par) amount of debt instrument at time of issuance.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant