XML 53 R42.htm IDEA: XBRL DOCUMENT v3.10.0.1

Subsequent Event (Details) - Deer Creek Ranch Water Co., LLC [Member] - SJWTX, Inc. [Member] - Subsequent Event [Member] $ in Thousands	Jul. 02, 2018 USD ($) a service_connection
Subsequent Event [Line Items]
Payment to acquire business | $	$ 2,700
Number of service connections acquired | service_connection	750
Area of land acquired (in acres) | a	1,191

X

- Definition

Business Combination, Area Of Land Acquired

+ References

No definition available.

+ Details

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Namespace Prefix:	sjw_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Business Combination, Number Of Service Connections Acquired

+ References

No definition available.

+ Details

Name:	sjw_BusinessCombinationNumberOfServiceConnectionsAcquired
Namespace Prefix:	sjw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=sjw_SJWTXInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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