XML 51 R36.htm IDEA: XBRL DOCUMENT
v3.19.3

Long-Term Liabilities and Bank Borrowings Long-Term Liabilities and Bank Borrowings (Details) $ in Thousands | Mar. 28, 2019 USD ($)
--- | ---
Long-Term Liabilities and Bank Borrowings [Abstract] |
Principal Debt Sold | $ 80,000
Debt Instrument, Interest Rate, Stated Percentage | 4.29%

X
- Definition Long-Term Liabilities and Bank Borrowings [Abstract] + References No definition available. + Details
Name: | sjw_LongTermLiabilitiesandBankBorrowingsAbstract
Namespace Prefix: | sjw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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 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