$SJW
SJW GROUP Stock $sjw

$sjw Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000076682923000041 Filed on February 24, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$137.3M	$171.4M	$620.7M
YoY Change	10.45%	22.64%	8.19%
Cost Of Revenue	$12.56M	$3.313M	$65.05M
YoY Change	-26.16%	-82.91%	-27.22%
Gross Profit	$124.7M	$168.1M	$555.7M
YoY Change	16.26%	39.64%	14.73%
Gross Profit Margin	90.85%	98.07%	89.52%
Selling, General & Admin	$24.34M	$24.03M	$95.40M
YoY Change	0.57%	7.28%	9.24%
% of Gross Profit	19.52%	14.3%	17.17%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$26.84M	$26.58M	$106.4M
YoY Change	-4.41%	8.2%	10.33%
% of Gross Profit	21.52%	15.81%	19.16%
Operating Expenses	$99.56M	$118.3M	$430.9M
YoY Change	3.54%	25.94%	13.86%
Operating Profit	$25.18M	$49.72M	$131.0M
YoY Change	51.78%	88.45%	17.83%
Interest Expense	$15.77M	-$15.90M	$58.06M
YoY Change	14.88%	24.65%	6.85%
% of Operating Profit	62.64%	-31.98%	44.33%
Other Income/Expense, Net	$3.266M	$3.854M	$4.385M
YoY Change	228.24%	66.19%	-35.23%
Pretax Income	$12.61M	$38.34M	$82.32M
YoY Change	162.45%	80.59%	19.58%
Income Tax	$1.078M	$4.838M	$8.496M
% Of Pretax Income	8.55%	12.62%	10.32%
Net Earnings	$11.53M	$33.50M	$73.83M
YoY Change	208.54%	85.91%	22.07%
Net Earnings / Revenue	8.4%	19.55%	11.89%
Basic Earnings Per Share	$0.37		$2.44
Diluted Earnings Per Share	$0.37	$1.09	$2.43
COMMON SHARES
Basic Shares Outstanding	30.85M shares	30.32M shares	30.30M shares
Diluted Shares Outstanding	31.04M shares		30.42M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$23.33M	$12.34M	$12.34M
YoY Change	33.43%	13.16%	13.16%
Cash & Equivalents	$23.33M	$12.34M
Short-Term Investments
Other Short-Term Assets	$6.216M	$6.095M	$77.64M
YoY Change	54.59%	24.34%	24.35%
Inventory
Prepaid Expenses	$11.38M	$9.753M
Receivables	$56.47M	$59.17M	$59.17M
Other Receivables	$5.145M	$5.560M	$5.560M
Total Short-Term Assets	$193.8M	$154.7M	$154.7M
YoY Change	40.54%	15.39%	15.39%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.619B	$2.635B	$2.655B
YoY Change	3.85%	5.29%	5.41%
Goodwill	$640.3M	$640.3M
YoY Change	0.0%	-0.02%
Intangibles
YoY Change
Long-Term Investments	$127.3M	$127.3M	$127.3M
YoY Change	702.59%	706.35%	706.35%
Other Assets	$803.3M	$806.7M	$39.13M
YoY Change	-1.47%	-1.52%	-75.97%
Total Long-Term Assets	$3.459B	$3.478B	$3.478B
YoY Change	2.51%	3.56%	3.56%
TOTAL ASSETS
Total Short-Term Assets	$193.8M	$154.7M	$154.7M
Total Long-Term Assets	$3.459B	$3.478B	$3.478B
Total Assets	$3.652B	$3.633B	$3.633B
YoY Change	4.0%	4.02%	4.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$25.97M	$29.58M	$29.58M
YoY Change	-8.44%	-2.67%	-2.67%
Accrued Expenses	$39.89M	$45.52M	$45.52M
YoY Change	-14.38%	5.97%	5.97%
Deferred Revenue
YoY Change
Short-Term Debt	$72.43M	$159.6M	$159.6M
YoY Change	-4.69%	153.31%	153.31%
Long-Term Debt Due	$44.27M	$4.360M	$4.360M
YoY Change	13.76%	-88.85%	-88.85%
Total Short-Term Liabilities	$213.0M	$264.7M	$264.6M
YoY Change	-2.24%	30.2%	30.2%
LONG-TERM LIABILITIES
Long-Term Debt	$1.520B	$1.492B	$1.492B
YoY Change	1.93%	-0.06%	-0.06%
Other Long-Term Liabilities	$25.98M	$25.88M	$547.0M
YoY Change	8.85%	7.63%	-2.54%
Total Long-Term Liabilities	$1.546B	$1.518B	$2.039B
YoY Change	2.04%	0.06%	-0.74%
TOTAL LIABILITIES
Total Short-Term Liabilities	$213.0M	$264.7M	$264.6M
Total Long-Term Liabilities	$1.546B	$1.518B	$2.039B
Total Liabilities	$1.759B	$1.782B	$2.522B
YoY Change	1.5%	3.62%	2.6%
SHAREHOLDERS EQUITY
Retained Earnings	$458.1M	$458.4M
YoY Change	8.8%	7.03%
Common Stock	$692.8M	$651.0M
YoY Change	14.01%	7.36%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.152B	$1.111B	$1.111B
YoY Change
Total Liabilities & Shareholders Equity	$3.652B	$3.633B	$3.633B
YoY Change	4.0%	4.02%	4.02%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$11.53M	$33.50M	$73.83M
YoY Change	208.54%	85.91%	22.07%
Depreciation, Depletion And Amortization	$26.84M	$26.58M	$106.4M
YoY Change	-4.41%	8.2%	10.33%
Cash From Operating Activities	$50.61M	$36.85M	$166.2M
YoY Change	11.73%	23.72%	27.81%
INVESTING ACTIVITIES
Capital Expenditures	$55.09M	$63.43M	$241.7M
YoY Change	-213.56%	-191.57%	-196.29%
Acquisitions
YoY Change
Other Investing Activities	-$225.0K	$556.0K	-$2.609M
YoY Change	-75.88%	-107.11%	-70.9%
Cash From Investing Activities	-$55.03M	-$62.88M	-$244.3M
YoY Change	11.3%	-18.45%	-6.03%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$39.09M
YoY Change			-57.06%
Debt Paid & Issued, Net	$956.0K		$89.18M
YoY Change	-18.43%		17.16%
Cash From Financing Activities	$15.41M	25.18M	$78.35M
YoY Change	52.31%	-41.73%	-41.0%
NET CHANGE
Cash From Operating Activities	$50.61M	36.85M	$166.2M
Cash From Investing Activities	-$55.03M	-62.88M	-$244.3M
Cash From Financing Activities	$15.41M	25.18M	$78.35M
Net Change In Cash	$10.99M	-846.0K	$225.0K
YoY Change	84.07%	-79.38%	-92.11%
FREE CASH FLOW
Cash From Operating Activities	$50.61M	$36.85M	$166.2M
Capital Expenditures	$55.09M	$63.43M	$241.7M
Free Cash Flow	-$4.480M	-$26.58M	-$75.52M
YoY Change	-104.78%	-126.83%	-119.82%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000766829
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-8966
CY2022	dei	Entity Registrant Name EntityRegistrantName	SJW GROUP
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	77-0066628
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	110 West Taylor Street,
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	San Jose,
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95110
CY2022	dei	City Area Code CityAreaCode	(408)
CY2022	dei	Local Phone Number LocalPhoneNumber	279-7800
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $0.001 per share
CY2022	dei	Trading Symbol TradingSymbol	SJW
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	1879000000	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	30846574	shares
CY2022	dei	Auditor Name AuditorName	Deloitte & Touche
CY2022	dei	Auditor Location AuditorLocation	San Jose, California
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Land PublicUtilitiesPropertyPlantAndEquipmentLand	39982000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Land PublicUtilitiesPropertyPlantAndEquipmentLand	39004000	usd
CY2022Q4	sjw	Public Utilities Property Plant And Equipment Depreciable Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment	3661285000	usd
CY2021Q4	sjw	Public Utilities Property Plant And Equipment Depreciable Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment	3381908000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	116851000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	176427000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	35959000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	36276000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3854077000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3633615000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1223760000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1136116000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	2630317000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	2497499000	usd
CY2022Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	58033000	usd
CY2021Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	57632000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	17158000	usd
CY2021Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	15951000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	40875000	usd
CY2021Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	41681000	usd
CY2022Q4	us-gaap	Cash Cash	12344000	usd
CY2021Q4	us-gaap	Cash Cash	10908000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	0	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1211000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5753000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4600000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	59172000	usd
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	53699000	usd
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	usd
CY2021Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	2308000	usd
CY2022Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	5560000	usd
CY2021Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	4735000	usd
CY2022Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	45722000	usd
CY2021Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	44026000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	16068000	usd
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	2629000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	9753000	usd
CY2021Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	9667000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	6095000	usd
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	4902000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	154714000	usd
CY2021Q4	us-gaap	Assets Current AssetsCurrent	134085000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	127275000	usd
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	151992000	usd
CY2022Q4	us-gaap	Investments Investments	14819000	usd
CY2021Q4	us-gaap	Investments Investments	15784000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	640311000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	640471000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	24313000	usd
CY2021Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	10883000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	806718000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	819130000	usd
CY2022Q4	us-gaap	Assets Assets	3632624000	usd
CY2021Q4	us-gaap	Assets Assets	3492395000	usd
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30801912	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30801912	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30181348	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30181348	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	31000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	30000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	651004000	usd
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	606392000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	458356000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	428260000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1477000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-163000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1110868000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1034519000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1491965000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1492935000	usd
CY2022Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	2602833000	usd
CY2021Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	2527454000	usd
CY2022Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	159578000	usd
CY2021Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	62996000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	4360000	usd
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	39106000	usd
CY2022Q4	sjw	Accruedgroundwaterextractionchargespurchasedwaterandpower Accruedgroundwaterextractionchargespurchasedwaterandpower	19707000	usd
CY2021Q4	sjw	Accruedgroundwaterextractionchargespurchasedwaterandpower Accruedgroundwaterextractionchargespurchasedwaterandpower	17200000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	29581000	usd
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	30391000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	13907000	usd
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	14174000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	11908000	usd
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	11583000	usd
CY2022Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	2696000	usd
CY2021Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	0	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	22913000	usd
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	27821000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	264650000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	203271000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	218155000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	200451000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	137696000	usd
CY2021Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	130693000	usd
CY2022Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	323668000	usd
CY2021Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	316479000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	59738000	usd
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	89998000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	25884000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	24049000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3632624000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3492395000	usd
CY2022	us-gaap	Revenues Revenues	620698000	usd
CY2021	us-gaap	Revenues Revenues	573686000	usd
CY2020	us-gaap	Revenues Revenues	564526000	usd
CY2022	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	122334000	usd
CY2021	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	98231000	usd
CY2020	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	100723000	usd
CY2022	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	8889000	usd
CY2021	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	13511000	usd
CY2020	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	13330000	usd
CY2022	sjw	Groundwater Extraction Charges GroundwaterExtractionCharges	56158000	usd
CY2021	sjw	Groundwater Extraction Charges GroundwaterExtractionCharges	75866000	usd
CY2020	sjw	Groundwater Extraction Charges GroundwaterExtractionCharges	71359000	usd
CY2022	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	45409000	usd
CY2021	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	41475000	usd
CY2020	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	40380000	usd
CY2022	us-gaap	Water Production Costs WaterProductionCosts	232790000	usd
CY2021	us-gaap	Water Production Costs WaterProductionCosts	229083000	usd
CY2020	us-gaap	Water Production Costs WaterProductionCosts	225792000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	95404000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	87332000	usd
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	79741000	usd
CY2022	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	30734000	usd
CY2021	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	26031000	usd
CY2020	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	22158000	usd
CY2022	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	32572000	usd
CY2021	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	30964000	usd
CY2020	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	29886000	usd
CY2022	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	104417000	usd
CY2021	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	94400000	usd
CY2020	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	89279000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	6197000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	7494000	usd
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	usd
CY2022	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2021	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	2211000	usd
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2022	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	489720000	usd
CY2021	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	462527000	usd
CY2020	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	446856000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	130978000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	111159000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	117670000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	58062000	usd
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	54339000	usd
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	54255000	usd
CY2022	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-5023000	usd
CY2021	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-1330000	usd
CY2020	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	374000	usd
CY2022	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	usd
CY2021	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	3000000	usd
CY2020	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	usd
CY2022	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	0	usd
CY2021	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	927000	usd
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	948000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4385000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6770000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5906000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	82324000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68847000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69895000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8496000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8369000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8380000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	73828000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	60478000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	61515000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-188000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	68000	usd
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-247000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-511000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	185000	usd
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-310000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-793000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-264000	usd
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	324000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-2151000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-716000	usd
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	880000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	75468000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	61379000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	60325000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.44
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.04
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3393000	usd
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.16
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.43
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.03
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.14
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	30304557	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	29601284	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28521900	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	30423735	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	29735533	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28694986	shares
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	889984000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	61515000	usd
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-247000	usd
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-310000	usd
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	324000	usd
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	880000	usd
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1863000	usd
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1830000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.28
CY2020	us-gaap	Dividends Dividends	36509000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	917160000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	60478000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	68000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	185000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-264000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-716000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4128000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1066000	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2026000	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	91029000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.36
CY2021	us-gaap	Dividends Dividends	40137000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1034519000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	73828000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-188000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-511000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-793000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-2151000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4641000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1354000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2091000	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	39085000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.44
CY2022	us-gaap	Dividends Dividends	43582000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1110868000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	73828000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	60478000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	61515000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	106439000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	96474000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	91622000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3244000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2851000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5497000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	4791000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	4246000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	3553000	usd
CY2022	sjw	Gain Loss On Disposition Of Property Plant Equipment Excluding Oil And Gas Property And Timber Property And On Sale Of Investment Real Estate GainLossOnDispositionOfPropertyPlantEquipmentExcludingOilAndGasPropertyAndTimberPropertyAndOnSaleOfInvestmentRealEstate	6197000	usd
CY2021	sjw	Gain Loss On Disposition Of Property Plant Equipment Excluding Oil And Gas Property And Timber Property And On Sale Of Investment Real Estate GainLossOnDispositionOfPropertyPlantEquipmentExcludingOilAndGasPropertyAndTimberPropertyAndOnSaleOfInvestmentRealEstate	11421000	usd
CY2020	sjw	Gain Loss On Disposition Of Property Plant Equipment Excluding Oil And Gas Property And Timber Property And On Sale Of Investment Real Estate GainLossOnDispositionOfPropertyPlantEquipmentExcludingOilAndGasPropertyAndTimberPropertyAndOnSaleOfInvestmentRealEstate	948000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1551000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1926000	usd
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1249000	usd
CY2022	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2021	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	2211000	usd
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2022	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	8222000	usd
CY2021	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	5931000	usd
CY2020	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	18918000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1388000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4843000	usd
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-357000	usd
CY2022	sjw	Increase Decreasein Accrued Groundwater Extraction Charges Purchased Waterand Power IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower	2507000	usd
CY2021	sjw	Increase Decreasein Accrued Groundwater Extraction Charges Purchased Waterand Power IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower	-1984000	usd
CY2020	sjw	Increase Decreasein Accrued Groundwater Extraction Charges Purchased Waterand Power IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower	1973000	usd
CY2022	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-11954000	usd
CY2021	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-6416000	usd
CY2020	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-3557000	usd
CY2022	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-7108000	usd
CY2021	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-4312000	usd
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-2965000	usd
CY2022	sjw	Increase Decrease To Regulatory Asset And Liabilities Excluding Income Tax Temporary Differences Net And Postretirement Benefits IncreaseDecreaseToRegulatoryAssetAndLiabilitiesExcludingIncomeTaxTemporaryDifferencesNetAndPostretirementBenefits	-1714000	usd
CY2021	sjw	Increase Decrease To Regulatory Asset And Liabilities Excluding Income Tax Temporary Differences Net And Postretirement Benefits IncreaseDecreaseToRegulatoryAssetAndLiabilitiesExcludingIncomeTaxTemporaryDifferencesNetAndPostretirementBenefits	14629000	usd
CY2020	sjw	Increase Decrease To Regulatory Asset And Liabilities Excluding Income Tax Temporary Differences Net And Postretirement Benefits IncreaseDecreaseToRegulatoryAssetAndLiabilitiesExcludingIncomeTaxTemporaryDifferencesNetAndPostretirementBenefits	14459000	usd
CY2022	sjw	Increase Decrease In Up Front Service Concession Payment IncreaseDecreaseInUpFrontServiceConcessionPayment	1600000	usd
CY2021	sjw	Increase Decrease In Up Front Service Concession Payment IncreaseDecreaseInUpFrontServiceConcessionPayment	0	usd
CY2020	sjw	Increase Decrease In Up Front Service Concession Payment IncreaseDecreaseInUpFrontServiceConcessionPayment	5000000	usd
CY2022	sjw	Increase Decrease In Other Noncurrent Assets And Liabilities IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilities	-17923000	usd
CY2021	sjw	Increase Decrease In Other Noncurrent Assets And Liabilities IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilities	-13381000	usd
CY2020	sjw	Increase Decrease In Other Noncurrent Assets And Liabilities IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilities	-751000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-261000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2123000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2413000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	166199000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	130040000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	104051000	usd
CY2022	sjw	Payments To Acquire Water Systems Using Company Funds PaymentsToAcquireWaterSystemsUsingCompanyFunds	218784000	usd
CY2021	sjw	Payments To Acquire Water Systems Using Company Funds PaymentsToAcquireWaterSystemsUsingCompanyFunds	233933000	usd
CY2020	sjw	Payments To Acquire Water Systems Using Company Funds PaymentsToAcquireWaterSystemsUsingCompanyFunds	195323000	usd
CY2022	sjw	Payments To Acquire Water Systems Using Contributions In Aid Of Construction PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction	22935000	usd
CY2021	sjw	Payments To Acquire Water Systems Using Contributions In Aid Of Construction PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction	17096000	usd
CY2020	sjw	Payments To Acquire Water Systems Using Contributions In Aid Of Construction PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction	17096000	usd
CY2022	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	631000	usd
CY2021	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	826000	usd
CY2020	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	435000	usd
CY2022	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	433000	usd
CY2021	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	23587000	usd
CY2020	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2022	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	2520000	usd
CY2021	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	2781000	usd
CY2020	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	2556000	usd
CY2022	sjw	Proceeds From Sale Of Property Held For Sale And From Sale Of Real Estate Investments ProceedsFromSaleOfPropertyHeldForSaleAndFromSaleOfRealEstateInvestments	975000	usd
CY2021	sjw	Proceeds From Sale Of Property Held For Sale And From Sale Of Real Estate Investments ProceedsFromSaleOfPropertyHeldForSaleAndFromSaleOfRealEstateInvestments	18228000	usd
CY2020	sjw	Proceeds From Sale Of Property Held For Sale And From Sale Of Real Estate Investments ProceedsFromSaleOfPropertyHeldForSaleAndFromSaleOfRealEstateInvestments	1151000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-244328000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-259995000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-214259000	usd
CY2022	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	158779000	usd
CY2021	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	96625000	usd
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	276174000	usd
CY2022	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	62197000	usd
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	208722000	usd
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	218289000	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	55000000	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	247000000	usd
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	85000000	usd
CY2022	sjw	Proceeds From Issuance Of Long Term Debt Held As Restricted Cash ProceedsFromIssuanceOfLongTermDebtHeldAsRestrictedCash	0	usd
CY2021	sjw	Proceeds From Issuance Of Long Term Debt Held As Restricted Cash ProceedsFromIssuanceOfLongTermDebtHeldAsRestrictedCash	0	usd
CY2020	sjw	Proceeds From Issuance Of Long Term Debt Held As Restricted Cash ProceedsFromIssuanceOfLongTermDebtHeldAsRestrictedCash	4000000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	89177000	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	76113000	usd
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	28931000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	43582000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	40137000	usd
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	36509000	usd
CY2022	sjw	Receipts Of Advances And Contributions In Aid Of Construction ReceiptsOfAdvancesAndContributionsInAidOfConstruction	23820000	usd
CY2021	sjw	Receipts Of Advances And Contributions In Aid Of Construction ReceiptsOfAdvancesAndContributionsInAidOfConstruction	26438000	usd
CY2020	sjw	Receipts Of Advances And Contributions In Aid Of Construction ReceiptsOfAdvancesAndContributionsInAidOfConstruction	23874000	usd
CY2022	sjw	Repayments Of Advances For Construction Financing Activities RepaymentsOfAdvancesForConstructionFinancingActivities	2859000	usd
CY2021	sjw	Repayments Of Advances For Construction Financing Activities RepaymentsOfAdvancesForConstructionFinancingActivities	2852000	usd
CY2020	sjw	Repayments Of Advances For Construction Financing Activities RepaymentsOfAdvancesForConstructionFinancingActivities	2767000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	39085000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	91028000	usd
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-515000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-462000	usd
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1019000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	78354000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	132805000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	101533000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	225000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2850000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-8675000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12119000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9269000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17944000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12344000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12119000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9269000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1211000	usd
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	4000000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	12344000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10908000	usd
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5269000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	63677000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	58175000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	59955000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	6853000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	8466000	usd
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10380000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	22561000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	20579000	usd
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	24571000	usd
CY2022	sjw	Utility Property Installed By Developer UtilityPropertyInstalledByDeveloper	2433000	usd
CY2021	sjw	Utility Property Installed By Developer UtilityPropertyInstalledByDeveloper	2659000	usd
CY2020	sjw	Utility Property Installed By Developer UtilityPropertyInstalledByDeveloper	9779000	usd
CY2022	sjw	Variable Interest Entities Number Of Entities VariableInterestEntitiesNumberOfEntities	2	entity
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:8pt;text-indent:31.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</span></div>
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Equipment PublicUtilitiesPropertyPlantAndEquipmentEquipment	652723000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Equipment PublicUtilitiesPropertyPlantAndEquipmentEquipment	598285000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	2649476000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	1802008000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	359086000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	981615000	usd
CY2022Q4	sjw	Public Utilities Property Plant And Equipment Depreciable Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment	3661285000	usd
CY2021Q4	sjw	Public Utilities Property Plant And Equipment Depreciable Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment	3381908000	usd
CY2022	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.033
CY2021	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.032
CY2020	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.032
CY2022	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4703000	usd
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4422000	usd
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4133000	usd
CY2022	sjw	Equity Funds Capitalized EquityFundsCapitalized	1551000	usd
CY2021	sjw	Equity Funds Capitalized EquityFundsCapitalized	1926000	usd
CY2020	sjw	Equity Funds Capitalized EquityFundsCapitalized	1249000	usd
CY2022Q4	us-gaap	Land Land	12615000	usd
CY2021Q4	us-gaap	Land Land	12615000	usd
CY2022Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	45418000	usd
CY2021Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	45017000	usd
CY2022Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	58033000	usd
CY2021Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	57632000	usd
CY2017Q4	sjw	Sales Agreement Holdback Amount SalesAgreementHoldbackAmount	3000000	usd
CY2021Q2	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	3000000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	4423000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	3157000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	3034000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	3197000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	3180000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	1679000	usd
CY2022	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2021	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	2211000	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	7342000	usd
CY2021Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	8026000	usd
CY2022Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	3420000	usd
CY2021Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	4191000	usd
CY2022Q4	sjw	Advances For Construction Estimated Refunds Next Twelve Months AdvancesForConstructionEstimatedRefundsNextTwelveMonths	3372000	usd
CY2022Q4	sjw	Advances For Construction Estimated Refunds Year Two AdvancesForConstructionEstimatedRefundsYearTwo	3332000	usd
CY2022Q4	sjw	Advances For Construction Estimated Refunds Year Three AdvancesForConstructionEstimatedRefundsYearThree	3135000	usd
CY2022Q4	sjw	Advances For Construction Estimated Refunds Year Four AdvancesForConstructionEstimatedRefundsYearFour	2931000	usd
CY2022Q4	sjw	Advances For Construction Estimated Refunds Year Five AdvancesForConstructionEstimatedRefundsYearFive	2749000	usd
CY2022Q4	sjw	Advances For Construction Estimated Refunds After Year Five AdvancesForConstructionEstimatedRefundsAfterYearFive	47370000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	137696000	usd
CY2022Q4	sjw	Customer Advancesfor Construction Non Refundable CustomerAdvancesforConstructionNonRefundable	46380000	usd
CY2022Q4	sjw	Customer Advancesfor Construction Refundedon Service Connections CustomerAdvancesforConstructionRefundedonServiceConnections	28427000	usd
CY2022	sjw	Contract With Customer Refund Liability Refund Period ContractWithCustomerRefundLiabilityRefundPeriod	P40Y
CY2022Q4	sjw	Contract With Customer Refund Liability Fair Value Disclosure ContractWithCustomerRefundLiabilityFairValueDisclosure	44715000	usd
CY2021Q4	sjw	Contract With Customer Refund Liability Fair Value Disclosure ContractWithCustomerRefundLiabilityFairValueDisclosure	51067000	usd
CY2022	sjw	Advances For Construction Deferred Taxes Amortization Period AdvancesForConstructionDeferredTaxesAmortizationPeriod	P40Y
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4426000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4511000	usd
CY2022Q4	sjw	Asset Retirement Obligation Discount Rate AssetRetirementObligationDiscountRate	0.06
CY2021Q4	sjw	Asset Retirement Obligation Discount Rate AssetRetirementObligationDiscountRate	0.06
CY2022Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	920000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	925000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	586918000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	559568000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	549270000	usd
CY2022	sjw	Alternative Revenue Programs Net AlternativeRevenueProgramsNet	-1312000	usd
CY2021	sjw	Alternative Revenue Programs Net AlternativeRevenueProgramsNet	5304000	usd
CY2020	sjw	Alternative Revenue Programs Net AlternativeRevenueProgramsNet	-493000	usd
CY2022	sjw	Regulatory Balancingand Memorandum Accounts Revenue Net RegulatoryBalancingandMemorandumAccountsRevenueNet	30179000	usd
CY2021	sjw	Regulatory Balancingand Memorandum Accounts Revenue Net RegulatoryBalancingandMemorandumAccountsRevenueNet	5138000	usd
CY2020	sjw	Regulatory Balancingand Memorandum Accounts Revenue Net RegulatoryBalancingandMemorandumAccountsRevenueNet	11856000	usd
CY2022	sjw	Regulatory Mechanisms Other Net RegulatoryMechanismsOtherNet	-692000	usd
CY2021	sjw	Regulatory Mechanisms Other Net RegulatoryMechanismsOtherNet	-1703000	usd
CY2020	sjw	Regulatory Mechanisms Other Net RegulatoryMechanismsOtherNet	-1639000	usd
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	5605000	usd
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	5379000	usd
CY2020	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	5532000	usd
CY2022	us-gaap	Revenues Revenues	620698000	usd
CY2021	us-gaap	Revenues Revenues	573686000	usd
CY2020	us-gaap	Revenues Revenues	564526000	usd
CY2022	sjw	Regulated Operating Revenue Water Surcharge RegulatedOperatingRevenueWaterSurcharge	6121000	usd
CY2021	sjw	Regulated Operating Revenue Water Surcharge RegulatedOperatingRevenueWaterSurcharge	5691000	usd
CY2020	sjw	Regulated Operating Revenue Water Surcharge RegulatedOperatingRevenueWaterSurcharge	4911000	usd
CY2022Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	52066000	usd
CY2021Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	84887000	usd
CY2022Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	143343000	usd
CY2021Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	154621000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	16068000	usd
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	2629000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	127275000	usd
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	151992000	usd
CY2022Q4	sjw	Regulatory Balancingand Memorandum Accounts Review Authorized Revenue Threshold Percentage RegulatoryBalancingandMemorandumAccountsReviewAuthorizedRevenueThresholdPercentage	0.02
CY2022Q4	sjw	Regulatory Balancingand Memorandum Accounts Net Under Collected RegulatoryBalancingandMemorandumAccountsNetUnderCollected	655000	usd
CY2022Q4	sjw	Balancingand Memorandum Revenue Account Refunds Collections BalancingandMemorandumRevenueAccountRefundsCollections	18174000	usd
CY2021Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	18451000	usd
CY2022	sjw	Balancingand Memorandum Revenue Account Increase Decrease BalancingandMemorandumRevenueAccountIncreaseDecrease	32786000	usd
CY2022	sjw	Balancingand Memorandum Revenue Account Refunds Collections BalancingandMemorandumRevenueAccountRefundsCollections	-22494000	usd
CY2022Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	28743000	usd
CY2021Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	19883000	usd
CY2022	sjw	Balancingand Memorandum Cost Recovery Account Increase Decrease BalancingandMemorandumCostRecoveryAccountIncreaseDecrease	5660000	usd
CY2022	sjw	Balancingand Memorandum Cost Recovery Account Refunds Collections BalancingandMemorandumCostRecoveryAccountRefundsCollections	-8517000	usd
CY2022Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	17026000	usd
CY2021Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	38334000	usd
CY2022	sjw	Balancingand Memorandum Account Increase Decrease BalancingandMemorandumAccountIncreaseDecrease	38446000	usd
CY2022	sjw	Balancingand Memorandum Account Refunds Collections BalancingandMemorandumAccountRefundsCollections	-31011000	usd
CY2022Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	45769000	usd
CY2020Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	10043000	usd
CY2021	sjw	Balancingand Memorandum Revenue Account Increase Decrease BalancingandMemorandumRevenueAccountIncreaseDecrease	8779000	usd
CY2021	sjw	Balancingand Memorandum Revenue Account Refunds Collections BalancingandMemorandumRevenueAccountRefundsCollections	-371000	usd
CY2021Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	18451000	usd
CY2020Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	15420000	usd
CY2021	sjw	Balancingand Memorandum Cost Recovery Account Increase Decrease BalancingandMemorandumCostRecoveryAccountIncreaseDecrease	4865000	usd
CY2021	sjw	Balancingand Memorandum Cost Recovery Account Refunds Collections BalancingandMemorandumCostRecoveryAccountRefundsCollections	-402000	usd
CY2021Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	19883000	usd
CY2020Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	25463000	usd
CY2021	sjw	Balancingand Memorandum Account Increase Decrease BalancingandMemorandumAccountIncreaseDecrease	13644000	usd
CY2021	sjw	Balancingand Memorandum Account Refunds Collections BalancingandMemorandumAccountRefundsCollections	-773000	usd
CY2021Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	38334000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2633000	usd
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30801912	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30801912	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30181348	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30181348	shares
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2021Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q1	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	59.00
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	1488788000	usd
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	1522955000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	17396000	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	19937000	usd
CY2022Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	9859000	usd
CY2021Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	10851000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	4360000	usd
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	39106000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1491965000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1492935000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	4360000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	48983000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	3648000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	23303000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	2299000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1406195000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8570000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8587000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11349000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3170000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2528000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3223000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3811000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-8073000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-21000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	960000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2576000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8496000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8369000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8380000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	82324000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68847000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69895000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	17288000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14458000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14678000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5328000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4572000	usd
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4142000	usd
CY2022	sjw	Effective Income Tax Rate Reconciliation Uncertain Tax Positions EffectiveIncomeTaxRateReconciliationUncertainTaxPositions	-1483000	usd
CY2021	sjw	Effective Income Tax Rate Reconciliation Uncertain Tax Positions EffectiveIncomeTaxRateReconciliationUncertainTaxPositions	-1678000	usd
CY2020	sjw	Effective Income Tax Rate Reconciliation Uncertain Tax Positions EffectiveIncomeTaxRateReconciliationUncertainTaxPositions	-1351000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-13091000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-8573000	usd
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-9215000	usd
CY2022	sjw	Effective Income Tax Rate Reconciliation Other Adjustments Merger Costs EffectiveIncomeTaxRateReconciliationOtherAdjustmentsMergerCosts	0	usd
CY2021	sjw	Effective Income Tax Rate Reconciliation Other Adjustments Merger Costs EffectiveIncomeTaxRateReconciliationOtherAdjustmentsMergerCosts	0	usd
CY2020	sjw	Effective Income Tax Rate Reconciliation Other Adjustments Merger Costs EffectiveIncomeTaxRateReconciliationOtherAdjustmentsMergerCosts	-296000	usd
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CY2021	sjw	Effective Income Tax Rate Reconciliation Nondeductible Expense Pensions EffectiveIncomeTaxRateReconciliationNondeductibleExpensePensions	429000	usd
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CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-297000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-331000	usd
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-333000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1643000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-569000	usd
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	873000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8496000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8369000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8380000	usd
CY2022Q4	sjw	Deferred Tax Assets Advances And Contributions DeferredTaxAssetsAdvancesAndContributions	25462000	usd
CY2021Q4	sjw	Deferred Tax Assets Advances And Contributions DeferredTaxAssetsAdvancesAndContributions	24584000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	575000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	599000	usd
CY2022Q4	sjw	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions And Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits	23161000	usd
CY2021Q4	sjw	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions And Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits	32396000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	4868000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	5579000	usd
CY2022Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	640000	usd
CY2021Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	514000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1444000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	6627000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	8128000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	62777000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	71800000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	229500000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	216497000	usd
CY2022Q4	sjw	Deferred Tax Liabilities Pension And Postretirement Benefits DeferredTaxLiabilitiesPensionAndPostretirementBenefits	17709000	usd
CY2021Q4	sjw	Deferred Tax Liabilities Pension And Postretirement Benefits DeferredTaxLiabilitiesPensionAndPostretirementBenefits	24779000	usd
CY2022Q4	sjw	Deferred Tax Liabilities Deferred Gain And Other Property Related DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated	5982000	usd
CY2021Q4	sjw	Deferred Tax Liabilities Deferred Gain And Other Property Related DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated	5901000	usd
CY2022Q4	sjw	Deferred Tax Liabilities Regulatory Asset Debt Premium DeferredTaxLiabilitiesRegulatoryAssetDebtPremium	4868000	usd
CY2021Q4	sjw	Deferred Tax Liabilities Regulatory Asset Debt Premium DeferredTaxLiabilitiesRegulatoryAssetDebtPremium	5579000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	2943000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3193000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	0	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	773000	usd
CY2022Q4	sjw	Deferred Tax Liability Regulatory Asset Income Tax Temporary Differences DeferredTaxLiabilityRegulatoryAssetIncomeTaxTemporaryDifferences	12849000	usd
CY2021Q4	sjw	Deferred Tax Liability Regulatory Asset Income Tax Temporary Differences DeferredTaxLiabilityRegulatoryAssetIncomeTaxTemporaryDifferences	6867000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	5508000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1376000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	5551000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	280932000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	272251000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	218155000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	200451000	usd
CY2022	sjw	Deferred Tax Liabilities Period Increase Decrease DeferredTaxLiabilitiesPeriodIncreaseDecrease	17704000	usd
CY2022Q4	sjw	Unrecognized Tax Benefits Gross UnrecognizedTaxBenefitsGross	9004000	usd
CY2021Q4	sjw	Unrecognized Tax Benefits Gross UnrecognizedTaxBenefitsGross	7961000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	8262000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	7009000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	7961000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	6468000	usd
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3834000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1549000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1104000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	117000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1530000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	284000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	usd
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	222000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9004000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	7961000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	6468000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	606000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	230000	usd
CY2022Q4	us-gaap	Finite Lived Customer Relationships Gross FiniteLivedCustomerRelationshipsGross	1400000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3869000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1553000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1401000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1518000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1518000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1518000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1518000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	1518000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1518000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	35959000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	36276000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	16367000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	20650000	usd
CY2022	us-gaap	Loss Contingency Disclosures LossContingencyDisclosures	ContingenciesSJW Group and its subsidiaries are subject to ordinary routine litigation incidental to its business. There are no pending legal proceedings to which SJW Group or any of its subsidiaries is a party, or to which any of its properties is the subject, that are expected to have a material effect on SJW Group’s business, financial position, results of operations or cash flows.
CY2022	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	2979000	usd
CY2021	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	2442000	usd
CY2022	sjw	Defined Benefit Plan Actuarial Gain Loss Discount Rate Change DefinedBenefitPlanActuarialGainLossDiscountRateChange	116372000	usd
CY2022	sjw	Defined Benefit Plan Actuarial Gain Loss Data And Other Changes DefinedBenefitPlanActuarialGainLossDataAndOtherChanges	-12422000	usd
CY2022	sjw	Defined Benefit Plan Actuarial Gain Loss Mortality Change DefinedBenefitPlanActuarialGainLossMortalityChange	4000	usd
CY2022Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	3420000	usd
CY2021Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	4191000	usd
CY2022	sjw	Health Care Spending Account Annual Maximum Employee Contribution HealthCareSpendingAccountAnnualMaximumEmployeeContribution	2500	usd
CY2022	sjw	Dependent Care Spending Account Annual Maximum Employee Contribution DependentCareSpendingAccountAnnualMaximumEmployeeContribution	5000	usd
CY2022	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	3003000	usd
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	2822000	usd
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	2824000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-31549000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-62270000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	56000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	73000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	269912000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	331943000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4791000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4246000	usd
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3553000	usd
CY2022	sjw	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Vested Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedGrantDateFairValue	4369000	usd
CY2021	sjw	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Vested Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedGrantDateFairValue	3332000	usd
CY2020	sjw	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Vested Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedGrantDateFairValue	3333000	usd
CY2022	sjw	Restricted Stock Awards Performancebased Issued Intrinsic Value RestrictedStockAwardsPerformancebasedIssuedIntrinsicValue	11551	shares
CY2021	sjw	Restricted Stock Awards Performancebased Issued Intrinsic Value RestrictedStockAwardsPerformancebasedIssuedIntrinsicValue	7327	shares
CY2020	sjw	Restricted Stock Awards Performancebased Issued Intrinsic Value RestrictedStockAwardsPerformancebasedIssuedIntrinsicValue	5327	shares
CY2022Q4	sjw	Restricted Stock Awards Performancebased Vested Balance RestrictedStockAwardsPerformancebasedVestedBalance	22421	shares
CY2022Q4	sjw	Restricted Stock Awards Performancebased Outstanding Balance RestrictedStockAwardsPerformancebasedOutstandingBalance	58346	shares
CY2022Q4	sjw	Number Purchase Intervals For Employee Stock Purchase Plan NumberPurchaseIntervalsForEmployeeStockPurchasePlan	16	interval
CY2022	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	36585	shares
CY2021	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	35304	shares
CY2020	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	31750	shares
CY2022	sjw	Number Of Subsidiaries NumberOfSubsidiaries	5	subsidiary
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2022	us-gaap	Revenues Revenues	620698000	usd
CY2022	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	489720000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	130978000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	73828000	usd
CY2022	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	104417000	usd
CY2022	us-gaap	Interest Expense InterestExpense	58062000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8496000	usd
CY2022Q4	us-gaap	Assets Assets	3632624000	usd
CY2021	us-gaap	Revenues Revenues	573686000	usd
CY2021	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	462527000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	111159000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	60478000	usd
CY2021	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	94400000	usd
CY2021	us-gaap	Interest Expense InterestExpense	54339000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8369000	usd
CY2021Q4	us-gaap	Assets Assets	3492395000	usd
CY2020	us-gaap	Revenues Revenues	564526000	usd
CY2020	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	446856000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	117670000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	61515000	usd
CY2020	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	89279000	usd
CY2020	us-gaap	Interest Expense InterestExpense	54255000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8380000	usd
CY2020Q4	us-gaap	Assets Assets	3311465000	usd
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30801912	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30801912	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30181348	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30181348	shares
CY2022	us-gaap	Net Income Loss NetIncomeLoss	73828000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	60478000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	61515000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1640000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	901000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1190000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	75468000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	61379000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	60325000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	73828000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	60478000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	61515000	usd
CY2022Q4	sjw	Restricted Net Assets Subsidiaries RestrictedNetAssetsSubsidiaries	366512000	usd
CY2022Q4	sjw	Restricted Net Assets Subsidiaries Percent Of Consolidated Assets RestrictedNetAssetsSubsidiariesPercentOfConsolidatedAssets	0.33
CY2022	dei	Auditor Firm AuditorFirmId	34

Files In Submission

Name	View Source	Status
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$SJW
SJW GROUP Stock $sjw

2023 Q1 Form 10-K Financial Statement

#000076682923000041 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SJW SJW GROUP Stock $sjw

2023 Q1 Form 10-K Financial Statement

#000076682923000041 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SJW
SJW GROUP Stock $sjw