Description of Business, Basis of Presentation, Corporate Transactions, Significant Accounting Policies, and Recent Accounting Pronouncements - Description of Business (Details) people in Thousands, home in Thousands	12 Months Ended
	Dec. 31, 2022 mi² people home utility
Concentration Risk [Line Items]
Number of water and waste water utilities owned | utility	29
Number of people served (more than 55,000) | people	74
Number of homes served | home	29
Area of certificated service areas | mi²	397
Santa Cruz | Revenue Benchmark | Geographic Concentration Risk
Concentration Risk [Line Items]
Percentage of customers on geographical basis	91.00%