XML 50 R34.htm IDEA: XBRL DOCUMENT v3.8.0.1

Regulatory Rate Filings (Details) - USD ($) $ in Thousands	Apr. 03, 2017	Sep. 30, 2017	Sep. 27, 2017	Jun. 06, 2017
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 7,550
Public Utilities, Requested Rate Increase (Decrease), Percentage	2.10%
Requested Service Charge Refund				$ 1,794
Regulatory Balancing and Memorandum Accounts, Net Under-Collected		$ 3,810	$ 11,474

X

- Definition

Regulatory Balancing and Memorandum Accounts,, Net Under-Collected

+ References

No definition available.

+ Details

Name:	sjw_RegulatoryBalancingandMemorandumAccountsNetUnderCollected
Namespace Prefix:	sjw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Requested Service Charge Refund

+ References

No definition available.

+ Details

Name:	sjw_RequestedServiceChargeRefund
Namespace Prefix:	sjw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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.

+ Details

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

X

- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Percentage of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration