XML 41 R31.htm IDEA: XBRL DOCUMENT
v3.23.3

Capitalization (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 22 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2023 | Mar. 31, 2023 | Feb. 28, 2023 | Dec. 31, 2022
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Common stock, par value (in usd per share) | $ 0.001 | $ 0.001 | $ 0.001 |  |  | $ 0.001
At The Market Offering |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Common stock, par value (in usd per share) |  |  |  | $ 0.001 |  |
Aggregate gross sales price (up to) |  |  |  | $ 240,000 | $ 100,000 |
Shares issued in offering (in shares) | 169,421 | 1,029,924 | 1,914,775 |  |  |
Weighted average price per share (in usd per share) | $ 69.57 | $ 74.57 | $ 74.05 |  |  |
Net proceeds from stock offering | $ 11,505 | $ 75,284 | $ 138,716 |  |  |
Total equity distribution | $ 98,209 | $ 98,209 | $ 98,209 |  |  |

X
- Definition Sale Of Stock, Aggregate Gross Sales Price + References No definition available. + Details
Name: | sjw_SaleOfStockAggregateGrossSalesPrice
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sale Of Stock, Total Equity Distribution Agreement Remaining + References No definition available. + Details
Name: | sjw_SaleOfStockTotalEquityDistributionAgreementRemaining
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sale Of Stock, Weighted Average Price Per Share + References No definition available. + Details
Name: | sjw_SaleOfStockWeightedAveragePricePerShare
Namespace Prefix: | sjw_
Data Type: | dtr-types1:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cash received on stock transaction after deduction of issuance costs. + References No definition available. + Details
Name: | us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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_SubsidiarySaleOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=sjw_AtTheMarketOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |