XML 73 R52.htm IDEA: XBRL DOCUMENT v3.25.0.1

Regulatory Matters - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 19, 2024	Dec. 31, 2024
Regulated Operations [Abstract]
Reduction in authorized return of equity		0.20%
Authorized revenue, threshold percentage		2.00%
Balancing and memorandum revenue account, refunds (collections)	$ 15,792

X

- Definition

Balancing Accounts, Increase (Decrease) In Authorized Return On Equity, Percentage

+ References

No definition available.

+ Details

Name:	sjw_BalancingAccountsIncreaseDecreaseInAuthorizedReturnOnEquityPercentage
Namespace Prefix:	sjw_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Balancing and Memorandum Revenue Account, Refunds (Collections)

+ References

No definition available.

+ Details

Name:	sjw_BalancingandMemorandumRevenueAccountRefundsCollections
Namespace Prefix:	sjw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Threshold balance of regulatory balancing or memorandum accounts as a percentage of authorized revenue to trigger an account review.

+ References

No definition available.

+ Details

Name:	sjw_RegulatoryBalancingAndMemorandumAccountsReviewAuthorizedRevenueThresholdPercentage
Namespace Prefix:	sjw_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_RegulatedOperationsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration