XML 58 R42.htm IDEA: XBRL DOCUMENT
v3.19.3

Subsequent Events (Details) $ in Thousands | Oct. 09, 2019 USD ($) mi² communities_served people_served service_connection | Oct. 08, 2019 USD ($) | Mar. 28, 2019 USD ($)
--- | --- | --- | ---
Subsequent Event [Line Items] |  |  |
Principal Debt Sold |  |  | $ 80,000
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.29%
SJWNE, LLC | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Public Utilities, Service Connections | service_connection | 138,000 |  |
Public Utilities, Number of People Served | people_served | 450,000 |  |
Public Utilities, Number of Communities Served | communities_served | 80 |  |
Public Utilities, Service Area | mi² | 269 |  |
Payments to Acquire Businesses, Gross | $ 838,476 |  |
Wastewater | SJWNE, LLC | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Public Utilities, Service Connections | service_connection | 3,000 |  |
Series 2019A | Senior Notes | Parent Company | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Principal Debt Sold |  | $ 310,000 |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.05% |
Series 2019B | Senior Notes | Parent Company | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Principal Debt Sold |  | $ 75,000 |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.15% |
Series 2019C | Senior Notes | Parent Company | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Principal Debt Sold |  | $ 125,000 |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.53% |

X
- Definition Principal Debt Sold + References No definition available. + Details
Name: | sjw_PrincipalDebtSold
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Number of People Served + References No definition available. + Details
Name: | sjw_PublicUtilitiesNumberOfPeopleServed
Namespace Prefix: | sjw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Number of Communities Served + References No definition available. + Details
Name: | sjw_PublicUtilitiesNumberofCommunitiesServed
Namespace Prefix: | sjw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Service Area + References No definition available. + Details
Name: | sjw_PublicUtilitiesServiceArea
Namespace Prefix: | sjw_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Service Connections + References No definition available. + Details
Name: | sjw_PublicUtilitiesServiceConnections
Namespace Prefix: | sjw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=sjw_SJWNELLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=sjw_WastewaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=sjw_Series2019AMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=sjw_Series2019BMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=sjw_Series2019CMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |