$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt

$cwt Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000103520124000004 Filed on February 29, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$154.9M	$214.5M	$790.3M
YoY Change	6.66%	6.76%	2.29%
Cost Of Revenue	$64.19M	$70.29M	$288.5M
YoY Change	16.68%	46.74%	7.22%
Gross Profit	$206.6M	$144.2M	$506.1M
YoY Change	171.47%	-5.76%	-12.34%
Gross Profit Margin	133.35%	67.23%	64.04%
Selling, General & Admin	$35.60M	$37.06M	$142.2M
YoY Change	-1.08%	11.31%	7.17%
% of Gross Profit	17.23%	25.7%	28.1%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$33.40M	$31.58M	$123.1M
YoY Change	9.75%	9.35%	4.91%
% of Gross Profit	16.17%	21.89%	24.33%
Operating Expenses	$128.7M	$109.0M	$429.0M
YoY Change	37.44%	-11.74%	-3.9%
Operating Profit	$77.89M	$35.24M	$77.14M
YoY Change	-544.5%	19.25%	-39.58%
Interest Expense	-$15.04M	-$12.34M	-$49.82M
YoY Change	25.47%	11.25%	12.35%
% of Operating Profit	-19.31%	-35.03%	-64.59%
Other Income/Expense, Net	$6.838M	$11.15M	$24.06M
YoY Change	-4.75%	119.7%	101.42%
Pretax Income	$71.01M	$34.04M	$59.78M
YoY Change	-445.72%	38.19%	-41.18%
Income Tax	$16.90M	$4.106M	-$6.781M
% Of Pretax Income	23.8%	12.06%	-11.34%
Net Earnings	$69.92M	$30.13M	$51.91M
YoY Change	-414.79%	53.96%	-45.93%
Net Earnings / Revenue	45.14%	14.04%	6.57%
Basic Earnings Per Share	$1.21		$0.91
Diluted Earnings Per Share	$1.21	$0.52	$0.91
COMMON SHARES
Basic Shares Outstanding	57.68M shares		56.95M shares
Diluted Shares Outstanding	57.77M shares		56.98M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$42.81M	$39.59M	$39.59M
YoY Change	-18.12%	-36.25%	-36.25%
Cash & Equivalents	$42.81M	$39.59M	$39.59M
Short-Term Investments
Other Short-Term Assets	$130.3M	$146.6M	$146.6M
YoY Change	14.3%	19.3%	19.3%
Inventory	$16.93M	$16.17M	$16.17M
Prepaid Expenses
Receivables	$51.35M	$59.35M	$59.35M
Other Receivables	$41.69M	$34.56M	$34.56M
Total Short-Term Assets	$283.1M	$296.3M	$296.3M
YoY Change	5.14%	0.25%	0.25%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.849B	$3.773B	$3.773B
YoY Change	24.01%	24.04%	23.44%
Goodwill	$37.04M	$37.04M
YoY Change	0.61%	0.61%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$227.6M	$231.3M	$489.0M
YoY Change	23.68%	31.5%	9.93%
Total Long-Term Assets	$4.498B	$4.299B	$4.299B
YoY Change	24.33%	20.93%	20.93%
TOTAL ASSETS
Total Short-Term Assets	$283.1M	$296.3M	$296.3M
Total Long-Term Assets	$4.498B	$4.299B	$4.299B
Total Assets	$4.781B	$4.596B	$4.596B
YoY Change	23.0%	19.34%	19.34%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$119.8M	$157.3M	$157.3M
YoY Change	-0.3%	11.57%	11.57%
Accrued Expenses	$90.22M	$70.82M	$70.82M
YoY Change	13.44%	3.98%	57.64%
Deferred Revenue		$2.992M
YoY Change		-3.51%
Short-Term Debt	$280.0M	$180.0M	$180.0M
YoY Change	115.38%	157.14%	157.14%
Long-Term Debt Due	$1.176M	$672.0K	$672.0K
YoY Change	-64.36%	-79.7%	-79.7%
Total Short-Term Liabilities	$507.9M	$430.3M	$430.3M
YoY Change	44.98%	46.05%	46.05%
LONG-TERM LIABILITIES
Long-Term Debt	$1.052B	$1.053B	$1.053B
YoY Change	-0.02%	0.03%	0.03%
Other Long-Term Liabilities	$1.380B	$76.78M	$1.329B
YoY Change	61.48%	4.29%	56.22%
Total Long-Term Liabilities	$1.052B	$1.130B	$2.382B
YoY Change	-0.02%	0.31%	25.15%
TOTAL LIABILITIES
Total Short-Term Liabilities	$507.9M	$430.3M	$430.3M
Total Long-Term Liabilities	$1.052B	$1.130B	$2.382B
Total Liabilities	$1.560B	$1.560B	$3.169B
YoY Change	11.22%	9.79%	25.09%
SHAREHOLDERS EQUITY
Retained Earnings	$603.3M	$549.6M
YoY Change	16.02%	-1.28%
Common Stock	$877.5M	$877.2M
YoY Change	12.76%	15.28%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.467B	$1.427B	$1.427B
YoY Change
Total Liabilities & Shareholders Equity	$4.781B	$4.596B	$4.596B
YoY Change	23.0%	19.34%	19.34%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$69.92M	$30.13M	$51.91M
YoY Change	-414.79%	53.96%	-45.93%
Depreciation, Depletion And Amortization	$33.40M	$31.58M	$123.1M
YoY Change	9.75%	9.35%	4.91%
Cash From Operating Activities	$26.52M	$74.31M	$217.8M
YoY Change	26.44%	69.15%	-10.65%
INVESTING ACTIVITIES
Capital Expenditures	$109.8M	$109.6M	$383.7M
YoY Change	33.94%	3.74%	17.08%
Acquisitions			$175.0K
YoY Change
Other Investing Activities	$0.00	-$175.0K	-$5.672M
YoY Change	-100.0%	-87.91%	-26.96%
Cash From Investing Activities	-$109.8M	-$109.8M	-$389.4M
YoY Change	33.78%	2.5%	16.06%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			-$113.3M
YoY Change			8.15%
Debt Paid & Issued, Net	$206.0K		$1.811M
YoY Change	-3.74%		-66.61%
Cash From Financing Activities	$86.59M	51.40M	$171.5M
YoY Change	38.48%	47.84%	78.46%
NET CHANGE
Cash From Operating Activities	$26.52M	74.31M	$217.8M
Cash From Investing Activities	-$109.8M	-109.8M	-$389.4M
Cash From Financing Activities	$86.59M	51.40M	$171.5M
Net Change In Cash	$3.297M	15.92M	-$59.00K
YoY Change	133.17%	-156.01%	-101.35%
FREE CASH FLOW
Cash From Operating Activities	$26.52M	$74.31M	$217.8M
Capital Expenditures	$109.8M	$109.6M	$383.7M
Free Cash Flow	-$83.29M	-$35.31M	-$165.9M
YoY Change	36.52%	-42.81%	97.57%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	1-13883
CY2023	dei	Entity Registrant Name EntityRegistrantName	CALIFORNIA WATER SERVICE GROUP
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	77-0448994
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	1720 North First Street
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	San Jose,
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95112
CY2023	dei	City Area Code CityAreaCode	408
CY2023	dei	Local Phone Number LocalPhoneNumber	367-8200
CY2023	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
CY2023	dei	Trading Symbol TradingSymbol	CWT
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	57675179	shares
CY2023	dei	Auditor Name AuditorName	DELOITTE & TOUCHE LLP
CY2023	dei	Auditor Location AuditorLocation	San Francisco, California
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CY2023Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	64240000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	66826000	usd
CY2023Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	16431000	usd
CY2022Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	20932000	usd
CY2023Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	36999000	usd
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CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	126686000	usd
CY2023	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	112481000	usd
CY2022	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	116172000	usd
CY2021	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	86392000	usd
CY2023	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	31975000	usd
CY2022	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	31715000	usd
CY2021	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	29592000	usd
CY2023	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	121212000	usd
CY2022	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	114575000	usd
CY2021	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	108715000	usd
CY2023	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	-15189000	usd
CY2022	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	3262000	usd
CY2021	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	2805000	usd
CY2023	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	36271000	usd
CY2022	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	35065000	usd
CY2021	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	32475000	usd
CY2023	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	717497000	usd
CY2022	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	718771000	usd
CY2021	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	664139000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	77135000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	127660000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	126770000	usd
CY2023	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	18509000	usd
CY2022	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	21276000	usd
CY2021	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	22761000	usd
CY2023	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	11807000	usd
CY2022	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	24821000	usd
CY2021	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	17234000	usd
CY2023	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	-20215000	usd
CY2022	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	-14476000	usd
CY2021	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	-9903000	usd
CY2023	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	5551000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	4127000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3186000	usd
CY2023	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	94000	usd
CY2023	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	8408000	usd
CY2022	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	3113000	usd
CY2021	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	1287000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	24060000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	11945000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	17423000	usd
CY2023	us-gaap	Interest Expense Debt InterestExpenseDebt	52809000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	46686000	usd
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	44980000	usd
CY2023	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2990000	usd
CY2022	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2344000	usd
CY2021	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	1766000	usd
CY2023	us-gaap	Interest Costs Incurred InterestCostsIncurred	49819000	usd
CY2022	us-gaap	Interest Costs Incurred InterestCostsIncurred	44342000	usd
CY2021	us-gaap	Interest Costs Incurred InterestCostsIncurred	43214000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	51376000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	95263000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	100979000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-535000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-748000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-146000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	51911000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	96011000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	101125000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.91
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.77
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.96
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.77
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.96
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54320000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51633000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51633000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51633000	shares
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	910281000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	100979000	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	204528000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1767000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.9200
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	47398000	usd
CY2021	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	5294000	usd
CY2021	cwt	Noncontrolling Interest Increase From Investment In Business NoncontrollingInterestIncreaseFromInvestmentInBusiness	0	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1171917000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	95263000	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	111761000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2013000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.0000
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	54186000	usd
CY2022	cwt	Noncontrolling Interest Increase From Investment In Business NoncontrollingInterestIncreaseFromInvestmentInBusiness	0	usd
CY2022	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	348000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1322394000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	51376000	usd
CY2023	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	117887000	usd
CY2023	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1844000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.0400
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	59036000	usd
CY2023	cwt	Noncontrolling Interest Increase From Investment In Business NoncontrollingInterestIncreaseFromInvestmentInBusiness	0	usd
CY2023	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	465000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1430312000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	51376000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	95263000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	100979000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	123124000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	117364000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111581000	usd
CY2023	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	262000	usd
CY2022	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	369000	usd
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	366000	usd
CY2023	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-35627000	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-26880000	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-25200000	usd
CY2023	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	4919000	usd
CY2022	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	-7161000	usd
CY2021	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3800000	usd
CY2023	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	5551000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	4127000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3186000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	2993000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	5161000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	6805000	usd
CY2023	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	94000	usd
CY2023	cwt	Noncash Project Abandonment Write Off Recovery NoncashProjectAbandonmentWriteOffRecovery	-536000	usd
CY2022	cwt	Noncash Project Abandonment Write Off Recovery NoncashProjectAbandonmentWriteOffRecovery	702000	usd
CY2021	cwt	Noncash Project Abandonment Write Off Recovery NoncashProjectAbandonmentWriteOffRecovery	524000	usd
CY2023	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-42711000	usd
CY2022	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	40687000	usd
CY2021	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	12833000	usd
CY2023	cwt	Increase In Allowance For Credit Losses Water Arrearages Payment Program IncreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram	0	usd
CY2022	cwt	Increase In Allowance For Credit Losses Water Arrearages Payment Program IncreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram	-20836000	usd
CY2021	cwt	Increase In Allowance For Credit Losses Water Arrearages Payment Program IncreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram	0	usd
CY2023	cwt	Decrease In Allowance For Credit Losses Water Arrearages Payment Program DecreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram	0	usd
CY2022	cwt	Decrease In Allowance For Credit Losses Water Arrearages Payment Program DecreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram	-3609000	usd
CY2021	cwt	Decrease In Allowance For Credit Losses Water Arrearages Payment Program DecreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram	0	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	3859000	usd
CY2022	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	381000	usd
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-1309000	usd
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-654000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	5104000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2745000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	9896000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-7626000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2938000	usd
CY2023	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-346000	usd
CY2022	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	7941000	usd
CY2021	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	1141000	usd
CY2023	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	33615000	usd
CY2022	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-23629000	usd
CY2021	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-9409000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	217817000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	243772000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	231718000	usd
CY2023	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	383747000	usd
CY2022	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	327757000	usd
CY2021	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	293194000	usd
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	108000	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	175000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	6451000	usd
CY2023	cwt	Payments For Asset Acquisitions PaymentsForAssetAcquisitions	2816000	usd
CY2022	cwt	Payments For Asset Acquisitions PaymentsForAssetAcquisitions	7766000	usd
CY2021	cwt	Payments For Asset Acquisitions PaymentsForAssetAcquisitions	0	usd
CY2023	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	usd
CY2022	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	usd
CY2021	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	1000000	usd
CY2023	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	2681000	usd
CY2022	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	6688000	usd
CY2021	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	2335000	usd
CY2023	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	6688000	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-389419000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-335523000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-300872000	usd
CY2023	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	227792000	usd
CY2022	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	150000000	usd
CY2021	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	200000000	usd
CY2023	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	120000000	usd
CY2022	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	115000000	usd
CY2021	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	535000000	usd
CY2023	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	278936000	usd
CY2023	cwt	Proceeds From Contribution In Aid Of Construction Financing Activities ProceedsFromContributionInAidOfConstructionFinancingActivities	21156000	usd
CY2022	cwt	Proceeds From Contribution In Aid Of Construction Financing Activities ProceedsFromContributionInAidOfConstructionFinancingActivities	25822000	usd
CY2021	cwt	Proceeds From Contribution In Aid Of Construction Financing Activities ProceedsFromContributionInAidOfConstructionFinancingActivities	28171000	usd
CY2023	cwt	Refunds Of Advances For Construction RefundsOfAdvancesForConstruction	9355000	usd
CY2022	cwt	Refunds Of Advances For Construction RefundsOfAdvancesForConstruction	9468000	usd
CY2021	cwt	Refunds Of Advances For Construction RefundsOfAdvancesForConstruction	10634000	usd
CY2023	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1811000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	5423000	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	5353000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1844000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2013000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1767000	usd
CY2023	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	115106000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	106739000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	197723000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	59036000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	54186000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	47398000	usd
CY2023	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	465000	usd
CY2022	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	348000	usd
CY2021	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	171543000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	96123000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	104678000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-59000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	4372000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	35524000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	85025000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	80653000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45129000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	84966000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	85025000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	80653000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	49145000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	43768000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	41621000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-3532000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3661000	usd
CY2023	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	54382000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	51511000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	57768000	usd
CY2023	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	24203000	usd
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	20379000	usd
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	19531000	usd
CY2023	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	0	usd
CY2022	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	0	usd
CY2021	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	9302000	usd
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	3120000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	2210000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	1485000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	575000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	179000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	790334000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	772616000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	765704000	usd
CY2023	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	4298000	usd
CY2022	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	73815000	usd
CY2021	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	25205000	usd
CY2023	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	794632000	usd
CY2022	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	846431000	usd
CY2021	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	790909000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	790334000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	772616000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	765704000	usd
CY2023	cwt	Maximum Collection Period In Which Deferred Net Wram And Mcba Revenues And Associated Costs Will Be Recognized MaximumCollectionPeriodInWhichDeferredNetWRAMAndMCBARevenuesAndAssociatedCostsWillBeRecognized	P24M
CY2023	cwt	Maximum Collection Period In Which Deferred Net Wram And Mcba Revenues And Associated Costs Will Be Recognized MaximumCollectionPeriodInWhichDeferredNetWRAMAndMCBARevenuesAndAssociatedCostsWillBeRecognized	P24M
CY2023	us-gaap	Revenue Recognition Leases RevenueRecognitionLeases	<div style="margin-bottom:8pt;margin-top:8pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Lease revenue is not considered revenue from contracts with customers and is recognized following operating lease standards. The Company is the lessor in operating lease agreements with telecommunications companies under which cellular phone antennas are placed on the Company's property. The Company provides the lessee the right to ingress and egress across lessor property to access the antennas. The minimum rents are recognized on a straight-line basis over the terms of the leases, which may span multiple years. The excess rents are recognized over amounts contractually due pursuant to the underlying leases and is included in a deferred receivable account in the accompanying balance sheet. The leases generally have terms of</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">5 to 10 years, with lessee options to extend the lease for up to 15 years. The exercise of lease renewal options is at the lessee’s sole discretion. Most of the Company’s lease agreements contain mutual termination options that require prior written notice by either lessee or lessor. A subset of the Company’s leases contains variable lease payments that depend on changes in the consumer price index (CPI).</span></div>The Company determines if an arrangement is a lease at inception. Generally, a lease agreement exists if the Company determines that the arrangement gives the lessee control over the use of an identified asset and obtains substantially all of the benefits from the identified asset.
CY2023Q4	us-gaap	Lessor Operating Lease Renewal Term LessorOperatingLeaseRenewalTerm	P15Y
CY2023Q4	cwt	Accounts Receivable From Developers Current AccountsReceivableFromDevelopersCurrent	6391000	usd
CY2022Q4	cwt	Accounts Receivable From Developers Current AccountsReceivableFromDevelopersCurrent	7419000	usd
CY2023Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	1378000	usd
CY2022Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	5496000	usd
CY2023Q4	us-gaap	Other Receivables OtherReceivables	8662000	usd
CY2022Q4	us-gaap	Other Receivables OtherReceivables	8017000	usd
CY2023Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	16431000	usd
CY2022Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	20932000	usd
CY2023	us-gaap	Public Utilities Property Plant And Equipment Common Useful Life PublicUtilitiesPropertyPlantAndEquipmentCommonUsefulLife	P50Y
CY2023	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0281
CY2022	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0290
CY2021	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0296
CY2023	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	5551000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	4127000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3186000	usd
CY2023	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2990000	usd
CY2022	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2344000	usd
CY2021	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	1766000	usd
CY2023	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	8541000	usd
CY2022	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	6471000	usd
CY2021	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	4952000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	39000000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	36700000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	36692000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	29459000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	262000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5444000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	128000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	0	usd
CY2023	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2209000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1789000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	39035000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	36692000	usd
CY2022	cwt	Deposit Assets Cash Collected Through Surcharge On Customers Bills DepositAssetsCashCollectedThroughSurchargeOnCustomersBills	400000	usd
CY2023	cwt	Deposit Assets Cash Collected Through Surcharge On Customers Bills DepositAssetsCashCollectedThroughSurchargeOnCustomersBills	400000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	39591000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	62100000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	45375000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	22925000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	84966000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	85025000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	300000	usd
CY2022	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	400000	usd
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	400000	usd
CY2023Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	199400000	usd
CY2022Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	199800000	usd
CY2023	cwt	Customer Advances For Construction Specified Refund Period CustomerAdvancesForConstructionSpecifiedRefundPeriod	P40Y
CY2023Q4	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	10800000	usd
CY2023Q4	us-gaap	Other Commitment Due In Second Year OtherCommitmentDueInSecondYear	10011000	usd
CY2023Q4	us-gaap	Other Commitment Due In Third Year OtherCommitmentDueInThirdYear	9651000	usd
CY2023Q4	us-gaap	Other Commitment Due In Fourth Year OtherCommitmentDueInFourthYear	9381000	usd
CY2023Q4	us-gaap	Other Commitment Due In Fifth Year OtherCommitmentDueInFifthYear	9001000	usd
CY2023Q4	us-gaap	Other Commitment Due After Fifth Year OtherCommitmentDueAfterFifthYear	150604000	usd
CY2023Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	199448000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	51376000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	95263000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	100979000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-535000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-748000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-146000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	51911000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	96011000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	101125000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	56952000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54320000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51633000	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56983000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	54363000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51633000	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.91
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.77
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.96
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.91
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.77
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.96
CY2023	us-gaap	Gain Loss On Investments GainLossOnInvestments	4919000	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	-7161000	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	3800000	usd
CY2023	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	18509000	usd
CY2023	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	11807000	usd
CY2022	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	21276000	usd
CY2022	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	24821000	usd
CY2021	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	22761000	usd
CY2021	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	17234000	usd
CY2023Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	257621000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	283620000	usd
CY2023Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	683717000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	627740000	usd
CY2023Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	64200000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	66800000	usd
CY2023Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	21500000	usd
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	12200000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	25682000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	12188000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	13494000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	20630000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	10968000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9662000	usd
CY2023Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	7239000	usd
CY2023Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	7239000	usd
CY2022Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	7149000	usd
CY2022Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	7149000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1500000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1500000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1400000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1839000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1720000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1392000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1144000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1038000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	6361000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	13494000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	36814000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	36814000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	225000	usd
CY2022	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	usd
CY2023Q4	us-gaap	Goodwill Goodwill	37039000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	36814000	usd
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	57723738	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	57723738	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	55597855	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	55597855	shares
CY2022Q2	cwt	Sale Of Stock Maximum Consideration On Transaction SaleOfStockMaximumConsiderationOnTransaction	350000000	usd
CY2022Q2	cwt	Sale Of Stock Agreement Term SaleOfStockAgreementTerm	P3Y
CY2023	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	2025891	shares
CY2023	cwt	Proceeds From Issuance Of Common Stock Excluding Employee Stock Purchase Plans ProceedsFromIssuanceOfCommonStockExcludingEmployeeStockPurchasePlans	112700000	usd
CY2023	us-gaap	Payments For Commissions PaymentsForCommissions	1100000	usd
CY2022	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	1802063	shares
CY2022	cwt	Proceeds From Issuance Of Common Stock Excluding Employee Stock Purchase Plans ProceedsFromIssuanceOfCommonStockExcludingEmployeeStockPurchasePlans	104600000	usd
CY2022	us-gaap	Payments For Commissions PaymentsForCommissions	1100000	usd
CY2023	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	200000	usd
CY2022	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	100000	usd
CY2022Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	68000000	shares
CY2022Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	136000000	shares
CY2022Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	4857000	usd
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	5112000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	1053440000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	1055797000	usd
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	672000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	3310000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1052768000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1052487000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	377000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	70354000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	357000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	334000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	20318000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	962656000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	22512000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	23188000	usd
CY2023Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	8276000	usd
CY2022Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	6953000	usd
CY2023Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	13488000	usd
CY2022Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	8138000	usd
CY2023Q4	cwt	Contract With Customer Uninsured Loss Reserve Current ContractWithCustomerUninsuredLossReserveCurrent	5954000	usd
CY2022Q4	cwt	Contract With Customer Uninsured Loss Reserve Current ContractWithCustomerUninsuredLossReserveCurrent	5320000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2992000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	3101000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	962000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1065000	usd
CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	5422000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	5252000	usd
CY2023Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	59606000	usd
CY2022Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	53017000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	508000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-7292000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-6784000	usd
CY2023	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	508000	usd
CY2023	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-7289000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-6781000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1857000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1860000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4726000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-211000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4515000	usd
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	6583000	usd
CY2022	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-208000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6375000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3446000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3446000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	3322000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2676000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	646000	usd
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	3322000	usd
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	770000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4092000	usd
CY2023	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	169700000	usd
CY2022	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	128000000	usd
CY2021	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	125500000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	9365000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	21344000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22065000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	14192000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3718000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7383000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7334000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-9478000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-6274000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-6327000	usd
CY2023	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1553000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1155000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-891000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	677000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	455000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	791000	usd
CY2023	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-11618000	usd
CY2022	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-13919000	usd
CY2021	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-19417000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	2182000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-1385000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	611000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-6781000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6375000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4092000	usd
CY2023Q4	cwt	Tax Cutsand Jobs Actof2017 Incomplete Accounting Ratepayer Net Refund TaxCutsandJobsActof2017IncompleteAccountingRatepayerNetRefund	92500000	usd
CY2023Q4	cwt	Deferred Tax Assets Developer Deposits For Extension Agreements And Contributions In Aid Of Construction DeferredTaxAssetsDeveloperDepositsForExtensionAgreementsAndContributionsInAidOfConstruction	33244000	usd
CY2022Q4	cwt	Deferred Tax Assets Developer Deposits For Extension Agreements And Contributions In Aid Of Construction DeferredTaxAssetsDeveloperDepositsForExtensionAgreementsAndContributionsInAidOfConstruction	31589000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	29406000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	18329000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	16896000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	13860000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	18364000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	22838000	usd
CY2023Q4	cwt	Deferred Tax Asset Operating Lease Liability DeferredTaxAssetOperatingLeaseLiability	3796000	usd
CY2022Q4	cwt	Deferred Tax Asset Operating Lease Liability DeferredTaxAssetOperatingLeaseLiability	4170000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3614000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4264000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	105320000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	95050000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	437224000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	393007000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	4875000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3746000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	4130000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	12237000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	13972000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	458082000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	425301000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	352762000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	330251000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13606000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15850000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13960000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2685000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1955000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1890000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4199000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16291000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13606000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15850000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	5000000	usd
CY2023	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.50
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.75
CY2023	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	8200000	usd
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7100000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7400000	usd
CY2023Q4	us-gaap	Deferred Compensation Cashbased Arrangements Liability Classified Noncurrent DeferredCompensationCashbasedArrangementsLiabilityClassifiedNoncurrent	66700000	usd
CY2022Q4	us-gaap	Deferred Compensation Cashbased Arrangements Liability Classified Noncurrent DeferredCompensationCashbasedArrangementsLiabilityClassifiedNoncurrent	59000000	usd
CY2023	us-gaap	Defined Benefit Plan Investment Policies And Strategies Narrative Description DefinedBenefitPlanInvestmentPoliciesAndStrategiesNarrativeDescription	Other Postretirement PlanThe Company provides substantially all active, permanent employees with medical, dental, and vision benefits through a self-insured plan. Employees retiring at or after age 58, along with their spouses and dependents, continue participation in the plan by payment of a premium. Plan assets are invested in mutual funds, short-term money market instruments and commercial paper based upon a similar asset mix to the pension plan. Retired employees are also provided with a $10,000 dollar life insurance benefit.The Company records the costs of postretirement benefits other than pensions (PBOP) during the employees' years of active service. In 2023, the Company recorded postretirement benefit income of $2.9 million. In 2022 and 2021, postretirement benefit expense was recorded for $0.1 million and $0.2 million, respectively.
CY2023Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.062
CY2023Q4	cwt	Defined Benefit Plan Health Care Cost Trend Rate Assumed Year Three DefinedBenefitPlanHealthCareCostTrendRateAssumedYearThree	0.060
CY2023Q4	cwt	Defined Benefit Plan Ultimate Health Care Cost Trend Rate Net Periodic Benefit Cost DefinedBenefitPlanUltimateHealthCareCostTrendRateNetPeriodicBenefitCost	0.040
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2000000	shares
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	12605000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	13838000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	13567000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	14903000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	19087000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	19820000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	14339000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	14017000	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2700000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4900000	usd
CY2023	cwt	Fair Value Inputs Risk Premium FairValueInputsRiskPremium	0.006
CY2023Q4	us-gaap	Lessee Finance Lease Renewal Term1 LesseeFinanceLeaseRenewalTerm1	P25Y
CY2023Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P25Y
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	13387000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	14762000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	962000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1065000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	4748000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	5803000	usd
CY2023Q4	cwt	Finance Lease Liability Including Debt Issuance Costs Current FinanceLeaseLiabilityIncludingDebtIssuanceCostsCurrent	844000	usd
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2555000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	3057000	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	2675000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3901000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	5230000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P112M
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P119M
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P29M
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P32M
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.036
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.035
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.055
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.044
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	2520000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	2514000	usd
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1609000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1606000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	190000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	246000	usd
CY2023	cwt	Finance Lease Cost Total FinanceLeaseCostTotal	1799000	usd
CY2022	cwt	Finance Lease Cost Total FinanceLeaseCostTotal	1852000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1442000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2101000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	549000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	519000	usd
CY2023	us-gaap	Lease Cost LeaseCost	6310000	usd
CY2022	us-gaap	Lease Cost LeaseCost	6986000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	2534000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	2498000	usd
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	190000	usd
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	246000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1400000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	824000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	558000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1634000	usd
CY2023	cwt	Right Of Use Asset Obtained In Exchange For Finance Lease Liability Decrease RightOfUseAssetObtainedInExchangeForFinanceLeaseLiabilityDecrease	-61000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	326000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2244000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1034000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1956000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	2505000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1740000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	705000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1547000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1460000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	6744000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	15691000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	4244000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2124000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	343000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	13567000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3901000	usd
CY2023Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	6000000	usd
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023	dei	Auditor Firm AuditorFirmId	34

Files In Submission

Name	View Source	Status
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0001035201-24-000004-index.html	Edgar Link	pending
0001035201-24-000004.txt	Edgar Link	pending
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cwt-20231231.htm	Edgar Link	pending
cwt-20231231.xsd	Edgar Link	pending
cwt-20231231xex1027.htm	Edgar Link	pending
cwt-20231231xex21.htm	Edgar Link	pending
cwt-20231231xex221.htm	Edgar Link	pending
cwt-20231231xex231.htm	Edgar Link	pending
cwt-20231231xex311.htm	Edgar Link	pending
cwt-20231231xex312.htm	Edgar Link	pending
cwt-20231231xex32.htm	Edgar Link	pending
cwt-20231231xex35.htm	Edgar Link	pending
cwt-20231231xex415.htm	Edgar Link	pending
cwt-20231231xex97.htm	Edgar Link	pending
cwt-20231231_g1.jpg	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
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R28.htm	Edgar Link	pending
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R3.htm	Edgar Link	pending
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cwt-20231231_def.xml	Edgar Link	unprocessable
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cwt-20231231_htm.xml	Edgar Link	completed
R34.htm	Edgar Link	pending
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R38.htm	Edgar Link	pending
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$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt

2024 Q1 Form 10-K Financial Statement

#000103520124000004 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CWT CALIFORNIA WATER SERVICE GROUP Stock $cwt

2024 Q1 Form 10-K Financial Statement

#000103520124000004 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt