$SJW
SJW GROUP Stock $sjw

$sjw Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000076682921000047 Filed on March 01, 2021

Income Statement

Concept	2020 Q4	2020 Q3	2020 Q2
Revenue	$135.7M	$165.9M	$147.2M
YoY Change	7.87%	45.5%	42.97%
Cost Of Revenue	$20.50M	$24.50M	$22.00M
YoY Change	18.5%	58.06%	107.55%
Gross Profit	$115.2M	$141.4M	$125.2M
YoY Change	6.18%	43.55%	35.5%
Gross Profit Margin	84.89%	85.25%	85.05%
Selling, General & Admin	$20.60M	$18.90M	$17.40M
YoY Change	-17.6%	35.0%	37.01%
% of Gross Profit	17.88%	13.37%	13.9%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$22.90M	$23.10M	$23.10M
YoY Change	8.53%	46.2%	46.2%
% of Gross Profit	19.88%	16.34%	18.45%
Operating Expenses	$90.90M	$99.50M	$89.10M
YoY Change	-2.05%	24.84%	29.88%
Operating Profit	$24.29M	$41.88M	$36.07M
YoY Change	303.76%	145.16%	64.17%
Interest Expense	-$14.70M	$13.17M	$13.18M
YoY Change	19.51%	99.97%	96.31%
% of Operating Profit	-60.52%	31.45%	36.54%
Other Income/Expense, Net	$2.900M	$1.130M	$1.048M
YoY Change	480.0%	272.94%	102.71%
Pretax Income	$12.40M	$30.67M	$23.93M
YoY Change	-313.79%	154.68%	33.29%
Income Tax	-$800.0K	$4.578M	$4.210M
% Of Pretax Income	-6.45%	14.93%	17.59%
Net Earnings	$13.28M	$26.09M	$19.72M
YoY Change	-342.14%	175.3%	45.67%
Net Earnings / Revenue	9.79%	15.73%	13.4%
Basic Earnings Per Share	$0.47	$0.91	$0.69
Diluted Earnings Per Share	$0.46	$0.91	$0.69
COMMON SHARES
Basic Shares Outstanding	28.56M shares	28.53M shares	28.51M shares
Diluted Shares Outstanding		28.70M shares	28.68M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2020 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$5.300M	$20.20M	$23.30M
YoY Change	-58.91%	-95.24%	-94.48%
Cash & Equivalents	$5.269M	$20.21M	$23.32M
Short-Term Investments
Other Short-Term Assets	$5.125M	$16.09M	$11.43M
YoY Change	75.03%	141.17%	121.4%
Inventory
Prepaid Expenses	$8.097M
Receivables	$46.83M	$51.37M	$44.88M
Other Receivables	$11.30M	$5.000M	$4.800M
Total Short-Term Assets	$127.3M	$154.9M	$145.5M
YoY Change	4.33%	-69.5%	-71.12%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.343B	$43.59M	$43.83M
YoY Change	5212.68%	0.79%	0.64%
Goodwill	$628.1M	$627.0M	$628.3M
YoY Change	-0.02%
Intangibles
YoY Change
Long-Term Investments	$14.40M	$13.60M	$13.50M
YoY Change	11.63%
Other Assets	$805.9M	$6.845M	$7.374M
YoY Change	6.06%	38.76%	52.54%
Total Long-Term Assets	$3.184B	$3.105B	$3.064B
YoY Change	319.06%	3844.47%	3439.42%
TOTAL ASSETS
Total Short-Term Assets	$127.3M	$154.9M	$145.5M
Total Long-Term Assets	$3.184B	$3.105B	$3.064B
Total Assets	$3.311B	$3.260B	$3.210B
YoY Change	5.71%	61.18%	60.21%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$34.20M	$33.76M	$24.30M
YoY Change	-1.97%	19.74%	-14.01%
Accrued Expenses	$46.10M	$55.80M	$51.10M
YoY Change	4.77%	35.44%	58.7%
Deferred Revenue
YoY Change
Short-Term Debt	$175.1M	$125.8M	$146.7M
YoY Change	49.4%	102.9%	166.73%
Long-Term Debt Due	$76.24M	$71.94M	$22.35M
YoY Change	242.32%
Total Short-Term Liabilities	$350.8M	$305.4M	$258.0M
YoY Change	49.55%	111.63%	103.03%
LONG-TERM LIABILITIES
Long-Term Debt	$1.288B	$1.308B	$1.316B
YoY Change	0.31%	155.85%	157.6%
Other Long-Term Liabilities	$21.79M	$25.04M	$22.68M
YoY Change	-2.33%	98.03%	82.1%
Total Long-Term Liabilities	$1.309B	$1.333B	$1.339B
YoY Change	0.27%	154.46%	155.8%
TOTAL LIABILITIES
Total Short-Term Liabilities	$350.8M	$305.4M	$258.0M
Total Long-Term Liabilities	$1.309B	$1.333B	$1.339B
Total Liabilities	$1.660B	$1.638B	$1.597B
YoY Change	7.77%	145.21%	145.49%
SHAREHOLDERS EQUITY
Retained Earnings	$408.0M	$403.9M	$387.0M
YoY Change	6.48%	1.68%	-2.35%
Common Stock	$510.2M	$509.1M	$508.1M
YoY Change	0.69%	1.93%	2.1%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$917.2M	$913.1M	$895.1M
YoY Change
Total Liabilities & Shareholders Equity	$3.311B	$3.260B	$3.210B
YoY Change	5.71%	61.18%	60.21%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2020 Q2
OPERATING ACTIVITIES
Net Income	$13.28M	$26.09M	$19.72M
YoY Change	-342.14%	175.3%	45.67%
Depreciation, Depletion And Amortization	$22.90M	$23.10M	$23.10M
YoY Change	8.53%	46.2%	46.2%
Cash From Operating Activities	$33.50M	$38.30M	$24.40M
YoY Change	-13.44%	-7.71%	-0.81%
INVESTING ACTIVITIES
Capital Expenditures	-$72.40M	-$60.90M	-$37.20M
YoY Change	8.55%	48.18%	-0.27%
Acquisitions
YoY Change
Other Investing Activities	-$600.0K	$800.0K	-$1.500M
YoY Change	-99.93%	-166.67%	66.67%
Cash From Investing Activities	-$73.10M	-$60.10M	-$38.60M
YoY Change	-91.9%	42.08%	1.31%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	28.60M	18.80M	9.200M
YoY Change	-93.75%	422.22%	-41.77%
NET CHANGE
Cash From Operating Activities	33.50M	38.30M	24.40M
Cash From Investing Activities	-73.10M	-60.10M	-38.60M
Cash From Financing Activities	28.60M	18.80M	9.200M
Net Change In Cash	-11.00M	-3.000M	-5.000M
YoY Change	-97.3%	-207.14%	-317.39%
FREE CASH FLOW
Cash From Operating Activities	$33.50M	$38.30M	$24.40M
Capital Expenditures	-$72.40M	-$60.90M	-$37.20M
Free Cash Flow	$105.9M	$99.20M	$61.60M
YoY Change	0.47%	20.1%	-0.48%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
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CY2020	dei	Entity File Number EntityFileNumber	001-8966
CY2020	dei	Entity Registrant Name EntityRegistrantName	SJW GROUP
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CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	48933000	USD
CY2020	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	22158000	USD
CY2019	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	20505000	USD
CY2018	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	18414000	USD
CY2020	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	29886000	USD
CY2019	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	19068000	USD
CY2018	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	14975000	USD
CY2020	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	89279000	USD
CY2019	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	65592000	USD
CY2018	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	54601000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	15768000	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	18610000	USD
CY2020	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	446856000	USD
CY2019	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	363003000	USD
CY2018	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	324259000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	117670000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	57479000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	73440000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	54255000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	31796000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	24332000	USD
CY2020	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	374000	USD
CY2019	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	3158000	USD
CY2018	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	2356000	USD
CY2020	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	0	USD
CY2019	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	0	USD
CY2018	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	-527000	USD
CY2020	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2019	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2018	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	104000	USD
CY2020	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	948000	USD
CY2019	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	929000	USD
CY2018	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	USD
CY2020	us-gaap	Interest Income Money Market Deposits InterestIncomeMoneyMarketDeposits	0	USD
CY2019	us-gaap	Interest Income Money Market Deposits InterestIncomeMoneyMarketDeposits	6536000	USD
CY2018	us-gaap	Interest Income Money Market Deposits InterestIncomeMoneyMarketDeposits	155000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5906000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2091000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2348000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69895000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	32081000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	48832000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8380000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8454000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10065000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	61515000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	23627000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	38767000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	224000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	61515000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	23403000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	38767000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-310000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	117000	USD
CY2018	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	880000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-9000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	60325000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	23529000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	38767000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.16
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.83
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.14
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.82
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28521900	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28443052	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21214277	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28694986	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28562546	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21332387	shares
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	463209000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	38767000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2020000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-4057000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1371000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	411076000	USD
CY2018	us-gaap	Dividends Dividends	23074000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	889312000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	23627000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	224000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	117000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-9000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3313000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	0	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	0	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-20000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-414000	USD
CY2019	sjw	Adjustmentsto Additional Paidin Capital Sharebased Compensation Equity Award Assumedin Acquisition AdjustmentstoAdditionalPaidinCapitalSharebasedCompensationEquityAwardAssumedinAcquisition	6384000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-110000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1603000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	10000	USD
CY2019	us-gaap	Dividends Dividends	34134000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	889984000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	61515000	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 Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	880000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3393000	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	Dividends Dividends	36509000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	917160000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	61515000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	23627000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	38767000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	91622000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	68489000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	56907000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5497000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1249000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-9486000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	3553000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	3406000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	2117000	USD
CY2020	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	948000	USD
CY2019	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	929000	USD
CY2018	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	USD
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1249000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	0	USD
CY2020	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	18918000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	3860000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	2003000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-357000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1946000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2130000	USD
CY2020	sjw	Increase Decreasein Accrued Groundwater Extraction Charges Purchased Waterand Power IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower	1973000	USD
CY2019	sjw	Increase Decreasein Accrued Groundwater Extraction Charges Purchased Waterand Power IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower	2853000	USD
CY2018	sjw	Increase Decreasein Accrued Groundwater Extraction Charges Purchased Waterand Power IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower	-688000	USD
CY2020	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-3557000	USD
CY2019	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-6044000	USD
CY2018	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	5841000	USD
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-2965000	USD
CY2019	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-4000000	USD
CY2018	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	203000	USD
CY2020	sjw	Increase Decrease To Regulatory Asset Related To Balancing And Memorandum Accounts IncreaseDecreaseToRegulatoryAssetRelatedToBalancingAndMemorandumAccounts	14459000	USD
CY2019	sjw	Increase Decrease To Regulatory Asset Related To Balancing And Memorandum Accounts IncreaseDecreaseToRegulatoryAssetRelatedToBalancingAndMemorandumAccounts	-30838000	USD
CY2018	sjw	Increase Decrease To Regulatory Asset Related To Balancing And Memorandum Accounts IncreaseDecreaseToRegulatoryAssetRelatedToBalancingAndMemorandumAccounts	6488000	USD
CY2020	sjw	Increase Decrease In Up Front Service Concession Payment IncreaseDecreaseInUpFrontServiceConcessionPayment	5000000	USD
CY2019	sjw	Increase Decrease In Up Front Service Concession Payment IncreaseDecreaseInUpFrontServiceConcessionPayment	0	USD
CY2018	sjw	Increase Decrease In Up Front Service Concession Payment IncreaseDecreaseInUpFrontServiceConcessionPayment	0	USD
CY2020	sjw	Increase Decrease In Other Noncurrent Assets And Liabilities IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilities	-751000	USD
CY2019	sjw	Increase Decrease In Other Noncurrent Assets And Liabilities IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilities	-7439000	USD
CY2018	sjw	Increase Decrease In Other Noncurrent Assets And Liabilities IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilities	-1923000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2413000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-7469000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1706000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	104051000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	130005000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	91343000	USD
CY2020	us-gaap	Payments To Acquire Water Systems PaymentsToAcquireWaterSystems	195323000	USD
CY2019	us-gaap	Payments To Acquire Water Systems PaymentsToAcquireWaterSystems	164325000	USD
CY2018	us-gaap	Payments To Acquire Water Systems PaymentsToAcquireWaterSystems	135973000	USD
CY2020	sjw	Payments To Acquire Water Systems Using Contributions In Aid Of Construction PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction	17096000	USD
CY2019	sjw	Payments To Acquire Water Systems Using Contributions In Aid Of Construction PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction	13563000	USD
CY2018	sjw	Payments To Acquire Water Systems Using Contributions In Aid Of Construction PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction	8454000	USD
CY2020	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	435000	USD
CY2019	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	137000	USD
CY2018	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	123000	USD
CY2020	sjw	Payments To Acquire Businesses Assets And Water Rights PaymentsToAcquireBusinessesAssetsAndWaterRights	0	USD
CY2019	sjw	Payments To Acquire Businesses Assets And Water Rights PaymentsToAcquireBusinessesAssetsAndWaterRights	835465000	USD
CY2018	sjw	Payments To Acquire Businesses Assets And Water Rights PaymentsToAcquireBusinessesAssetsAndWaterRights	2496000	USD
CY2020	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	2556000	USD
CY2019	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	5026000	USD
CY2018	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	3909000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	1151000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	745000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	0	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	0	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	0	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	4112000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-214259000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1017771000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-146843000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	276174000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	105349000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	76000000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	218289000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	192055000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	85000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	590000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	4000000	USD
CY2019	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	5000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	0	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	28931000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1400000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	829000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	4918000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	36509000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	34134000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	23074000	USD
CY2020	sjw	Receipts Of Advances And Contributions In Aid Of Construction ReceiptsOfAdvancesAndContributionsInAidOfConstruction	23874000	USD
CY2019	sjw	Receipts Of Advances And Contributions In Aid Of Construction ReceiptsOfAdvancesAndContributionsInAidOfConstruction	18904000	USD
CY2018	sjw	Receipts Of Advances And Contributions In Aid Of Construction ReceiptsOfAdvancesAndContributionsInAidOfConstruction	10890000	USD
CY2020	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	2767000	USD
CY2019	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	2911000	USD
CY2018	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	2700000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-10000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	411385000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-190000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1163000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3078000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	101533000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	484988000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	468423000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-8675000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-402778000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	412923000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17944000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	420722000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	7799000	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
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	420722000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Equipment PublicUtilitiesPropertyPlantAndEquipmentEquipment	521183000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	4000000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	5000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5269000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	12944000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	420722000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	59955000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	32138000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	27038000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10380000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	16448000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13750000	USD
CY2020	sjw	Noncash Change In Accrued Payables NoncashChangeInAccruedPayables	1448000	USD
CY2019	sjw	Noncash Change In Accrued Payables NoncashChangeInAccruedPayables	-516000	USD
CY2018	sjw	Noncash Change In Accrued Payables NoncashChangeInAccruedPayables	340000	USD
CY2020	sjw	Utility Property Installed By Developer UtilityPropertyInstalledByDeveloper	9779000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Equipment PublicUtilitiesPropertyPlantAndEquipmentEquipment	567904000	USD
CY2019	sjw	Utility Property Installed By Developer UtilityPropertyInstalledByDeveloper	3077000	USD
CY2018	sjw	Utility Property Installed By Developer UtilityPropertyInstalledByDeveloper	1747000	USD
CY2020	sjw	Variable Interest Entities Number Of Entities VariableInterestEntitiesNumberOfEntities	2	entity
CY2020	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 accounting principles generally accepted in the United States of America 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>
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	1699953000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	2207051000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	930203000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	260220000	USD
CY2020Q4	sjw	Public Utilities Property Plant And Equipment Depreciable Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment	3198060000	USD
CY2019Q4	sjw	Public Utilities Property Plant And Equipment Depreciable Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment	2988454000	USD
CY2020	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.032
CY2019	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.038
CY2018	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.036
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4133000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4323000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	2856000	USD
CY2020	sjw	Equity Funds Capitalized EquityFundsCapitalized	1249000	USD
CY2020Q4	us-gaap	Land Land	14168000	USD
CY2019Q4	us-gaap	Land Land	14168000	USD
CY2020Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	43961000	USD
CY2019Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	43531000	USD
CY2020Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	58129000	USD
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	57699000	USD
CY2019Q2	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	745000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	4264000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	2745000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2565000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2645000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2833000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	7711000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	8026000	USD
CY2019Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	7086000	USD
CY2020Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	4311000	USD
CY2019Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	3829000	USD
CY2019Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	-1940000	USD
CY2020	sjw	Balancingand Memorandum Revenue Account Increase Decrease BalancingandMemorandumRevenueAccountIncreaseDecrease	2516000	USD
CY2020	sjw	Balancingand Memorandum Revenue Account Refunds Collections BalancingandMemorandumRevenueAccountRefundsCollections	9467000	USD
CY2020Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	10043000	USD
CY2019Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	7223000	USD
CY2020	sjw	Balancingand Memorandum Cost Recovery Account Increase Decrease BalancingandMemorandumCostRecoveryAccountIncreaseDecrease	8324000	USD
CY2020	sjw	Balancingand Memorandum Cost Recovery Account Refunds Collections BalancingandMemorandumCostRecoveryAccountRefundsCollections	-127000	USD
CY2020Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	15420000	USD
CY2019Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	5283000	USD
CY2020	sjw	Balancingand Memorandum Account Increase Decrease BalancingandMemorandumAccountIncreaseDecrease	10840000	USD
CY2020	sjw	Balancingand Memorandum Account Refunds Collections BalancingandMemorandumAccountRefundsCollections	9340000	USD
CY2020Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	25463000	USD
CY2018Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	25549000	USD
CY2019	sjw	Balancingand Memorandum Revenue Account Increase Decrease BalancingandMemorandumRevenueAccountIncreaseDecrease	-4984000	USD
CY2019	sjw	Balancingand Memorandum Revenue Account Refunds Collections BalancingandMemorandumRevenueAccountRefundsCollections	-22505000	USD
CY2019Q4	sjw	Balancingand Memorandum Revenue Account Net BalancingandMemorandumRevenueAccountNet	-1940000	USD
CY2018Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	8864000	USD
CY2019	sjw	Balancingand Memorandum Cost Recovery Account Increase Decrease BalancingandMemorandumCostRecoveryAccountIncreaseDecrease	962000	USD
CY2019	sjw	Balancingand Memorandum Cost Recovery Account Refunds Collections BalancingandMemorandumCostRecoveryAccountRefundsCollections	-2603000	USD
CY2019Q4	sjw	Balancingand Memorandum Cost Recovery Account Net BalancingandMemorandumCostRecoveryAccountNet	7223000	USD
CY2018Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	34413000	USD
CY2019	sjw	Balancingand Memorandum Account Increase Decrease BalancingandMemorandumAccountIncreaseDecrease	-4022000	USD
CY2019	sjw	Balancingand Memorandum Account Refunds Collections BalancingandMemorandumAccountRefundsCollections	-25108000	USD
CY2019Q4	sjw	Balancing And Memorandum Account Net BalancingAndMemorandumAccountNet	5283000	USD
CY2020Q4	sjw	Regulatory Balancingand Memorandum Accounts Net Under Collected RegulatoryBalancingandMemorandumAccountsNetUnderCollected	1586000	USD
CY2020Q4	sjw	Regulatory Balancingand Memorandum Accounts Review Authorized Revenue Threshold Percentage RegulatoryBalancingandMemorandumAccountsReviewAuthorizedRevenueThresholdPercentage	0.02
CY2020Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	158230000	USD
CY2019Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	120417000	USD
CY2020Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1748000	USD
CY2019Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	6472000	USD
CY2020Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	156482000	USD
CY2019Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	113945000	USD
CY2020	sjw	Advances For Construction Refund Period AdvancesForConstructionRefundPeriod	P40Y
CY2020Q4	sjw	Advances For Construction Estimated Refunds Next Twelve Months AdvancesForConstructionEstimatedRefundsNextTwelveMonths	3050000	USD
CY2020Q4	sjw	Advances For Construction Estimated Refunds Year Two AdvancesForConstructionEstimatedRefundsYearTwo	3050000	USD
CY2020Q4	sjw	Advances For Construction Estimated Refunds Year Three AdvancesForConstructionEstimatedRefundsYearThree	3038000	USD
CY2020Q4	sjw	Advances For Construction Estimated Refunds Year Four AdvancesForConstructionEstimatedRefundsYearFour	2958000	USD
CY2020Q4	sjw	Advances For Construction Estimated Refunds Year Five AdvancesForConstructionEstimatedRefundsYearFive	2896000	USD
CY2020Q4	sjw	Advances For Construction Estimated Refunds After Year Five AdvancesForConstructionEstimatedRefundsAfterYearFive	52462000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	125027000	USD
CY2020	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	5532000	USD
CY2020Q4	sjw	Customer Advancesfor Construction Non Refundable CustomerAdvancesforConstructionNonRefundable	29117000	USD
CY2020Q4	sjw	Customer Advancesfor Construction Refundedon Service Connections CustomerAdvancesforConstructionRefundedonServiceConnections	28456000	USD
CY2020	sjw	Contract With Customer Refund Liability Refund Period ContractWithCustomerRefundLiabilityRefundPeriod	P40Y
CY2020Q4	sjw	Contract With Customer Refund Liability Fair Value Disclosure ContractWithCustomerRefundLiabilityFairValueDisclosure	50391000	USD
CY2019Q4	sjw	Contract With Customer Refund Liability Fair Value Disclosure ContractWithCustomerRefundLiabilityFairValueDisclosure	50035000	USD
CY2020	sjw	Advances For Construction Deferred Taxes Amortization Period AdvancesForConstructionDeferredTaxesAmortizationPeriod	P40Y
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4619000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4803000	USD
CY2020Q4	sjw	Asset Retirement Obligation Discount Rate AssetRetirementObligationDiscountRate	0.06
CY2019Q4	sjw	Asset Retirement Obligation Discount Rate AssetRetirementObligationDiscountRate	0.06
CY2020Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	939000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	942000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	549270000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	447720000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	389302000	USD
CY2020	sjw	Alternative Revenue Programs Net AlternativeRevenueProgramsNet	-493000	USD
CY2019	sjw	Alternative Revenue Programs Net AlternativeRevenueProgramsNet	-18232000	USD
CY2018	sjw	Alternative Revenue Programs Net AlternativeRevenueProgramsNet	10456000	USD
CY2020	sjw	Regulatory Balancingand Memorandum Accounts Revenue Net RegulatoryBalancingandMemorandumAccountsRevenueNet	10217000	USD
CY2019	sjw	Regulatory Balancingand Memorandum Accounts Revenue Net RegulatoryBalancingandMemorandumAccountsRevenueNet	-14403000	USD
CY2018	sjw	Regulatory Balancingand Memorandum Accounts Revenue Net RegulatoryBalancingandMemorandumAccountsRevenueNet	-7541000	USD
CY2019	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	5397000	USD
CY2018	us-gaap	Revenues Revenues	397699000	USD
CY2020	sjw	Regulated Operating Revenue Water Surcharge RegulatedOperatingRevenueWaterSurcharge	4911000	USD
CY2018	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	5482000	USD
CY2020	us-gaap	Revenues Revenues	564526000	USD
CY2019	us-gaap	Revenues Revenues	420482000	USD
CY2019	sjw	Regulated Operating Revenue Water Surcharge RegulatedOperatingRevenueWaterSurcharge	4955000	USD
CY2018	sjw	Regulated Operating Revenue Water Surcharge RegulatedOperatingRevenueWaterSurcharge	5013000	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	70000000	shares
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	28556605	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	28556605	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	28456508	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	28456508	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1352320000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1292586000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	22479000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	25020000	USD
CY2020Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	10978000	USD
CY2019Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	11737000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	76241000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	22272000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1287580000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1283597000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	76322000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	39179000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	4360000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	48983000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	3648000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1179828000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8454000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11349000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7577000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	14485000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2528000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2126000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5066000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-8073000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1929000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7702000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2576000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	680000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1784000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8380000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69895000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	32081000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	48832000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14678000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6737000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10065000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	10255000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4142000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2251000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3420000	USD
CY2020	sjw	Effective Income Tax Rate Reconciliation Uncertain Tax Positions EffectiveIncomeTaxRateReconciliationUncertainTaxPositions	-1351000	USD
CY2019	sjw	Effective Income Tax Rate Reconciliation Uncertain Tax Positions EffectiveIncomeTaxRateReconciliationUncertainTaxPositions	-323000	USD
CY2018	sjw	Effective Income Tax Rate Reconciliation Uncertain Tax Positions EffectiveIncomeTaxRateReconciliationUncertainTaxPositions	-24000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-9215000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-2054000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-839000	USD
CY2020	sjw	Effective Income Tax Rate Reconciliation Other Adjustments Merger Costs EffectiveIncomeTaxRateReconciliationOtherAdjustmentsMergerCosts	-296000	USD
CY2019	sjw	Effective Income Tax Rate Reconciliation Other Adjustments Merger Costs EffectiveIncomeTaxRateReconciliationOtherAdjustmentsMergerCosts	5350000	USD
CY2018	sjw	Effective Income Tax Rate Reconciliation Other Adjustments Merger Costs EffectiveIncomeTaxRateReconciliationOtherAdjustmentsMergerCosts	0	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	77000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2020	sjw	Effective Income Tax Rate Reconciliation Reversal Of Excess Deferred Taxes Recognized In Regulatory Liability Amount EffectiveIncomeTaxRateReconciliationReversalOfExcessDeferredTaxesRecognizedInRegulatoryLiabilityAmount	-2912000	USD
CY2019	sjw	Effective Income Tax Rate Reconciliation Reversal Of Excess Deferred Taxes Recognized In Regulatory Liability Amount EffectiveIncomeTaxRateReconciliationReversalOfExcessDeferredTaxesRecognizedInRegulatoryLiabilityAmount	-2355000	USD
CY2018	sjw	Effective Income Tax Rate Reconciliation Reversal Of Excess Deferred Taxes Recognized In Regulatory Liability Amount EffectiveIncomeTaxRateReconciliationReversalOfExcessDeferredTaxesRecognizedInRegulatoryLiabilityAmount	-1383000	USD
CY2020	sjw	Effective Income Tax Rate Reconciliation Nondeductible Expense Pensions EffectiveIncomeTaxRateReconciliationNondeductibleExpensePensions	92000	USD
CY2019	sjw	Effective Income Tax Rate Reconciliation Nondeductible Expense Pensions EffectiveIncomeTaxRateReconciliationNondeductibleExpensePensions	-1244000	USD
CY2018	sjw	Effective Income Tax Rate Reconciliation Nondeductible Expense Pensions EffectiveIncomeTaxRateReconciliationNondeductibleExpensePensions	0	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-333000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-223000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-1602000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	873000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-408000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	190000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8380000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8454000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10065000	USD
CY2020Q4	sjw	Deferred Tax Assets Advances And Contributions DeferredTaxAssetsAdvancesAndContributions	22573000	USD
CY2019Q4	sjw	Deferred Tax Assets Advances And Contributions DeferredTaxAssetsAdvancesAndContributions	19547000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	619000	USD
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CY2018	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	1569000	USD
CY2020Q4	sjw	Restricted Stock Awards Performancebased Outstanding Balance RestrictedStockAwardsPerformancebasedOutstandingBalance	43257	shares
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CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3553000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3406000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2117000	USD
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1830000	USD
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CY2019	sjw	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Vested Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedGrantDateFairValue	2420000	USD
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CY2019	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	30255	shares
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CY2020	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	89279000	USD
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CY2020Q4	us-gaap	Assets Assets	3311465000	USD
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CY2019	us-gaap	Interest Expense InterestExpense	31796000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8454000	USD
CY2019Q4	us-gaap	Assets Assets	3132470000	USD
CY2018	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	397699000	USD
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CY2018	us-gaap	Interest Expense InterestExpense	24332000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10065000	USD
CY2017Q4	us-gaap	Assets Assets	1956389000	USD
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CY2018	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	514364000	USD
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CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	36070000	USD
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CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	24290000	USD
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CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	26093000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	13284000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2282000	USD
CY2020Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19731000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	26169000	USD
CY2020Q4	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	12142000	USD
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CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
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CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.32
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CY2020Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.32
CY2019Q1	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	77682000	USD
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CY2019Q4	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	125838000	USD
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CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	9478000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	-5486000	USD
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CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9478000	USD
CY2019Q4	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-5360000	USD
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$SJW
SJW GROUP Stock $sjw

2020 Q4 Form 10-K Financial Statement

#000076682921000047 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SJW SJW GROUP Stock $sjw

2020 Q4 Form 10-K Financial Statement

#000076682921000047 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SJW
SJW GROUP Stock $sjw