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Revenues - Additional Information (Details) - Sales - Customer Concentration Risk	3 Months Ended
	Mar. 31, 2022
GSWC | Water Service Utility Operations [Member]
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	90.00%
Golden State Water Company and Bear Valley Electric Service Inc. | Electric Service Utility Operations
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	90.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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