$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt

$cwt Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000103520120000002 Filed on February 27, 2020

Income Statement

Concept	2019 Q4	2018 Q4	2018 Q3
Revenue	$176.9M	$174.3M	$209.5M
YoY Change	1.49%	1.81%	6.36%
Cost Of Revenue	$53.00M	$46.40M	$78.80M
YoY Change	14.22%	-0.22%	4.65%
Gross Profit	$123.9M	$127.9M	$142.5M
YoY Change	-3.13%	2.57%	4.47%
Gross Profit Margin	70.04%	73.38%	68.01%
Selling, General & Admin	$27.30M	$23.60M	$26.50M
YoY Change	15.68%	-10.61%	16.74%
% of Gross Profit	22.03%	18.45%	18.6%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$22.80M	$21.60M	$21.50M
YoY Change	5.56%	10.2%	9.14%
% of Gross Profit	18.4%	16.89%	15.09%
Operating Expenses	$100.8M	$92.80M	$83.40M
YoY Change	8.62%	3.11%	10.03%
Operating Profit	$20.36M	$26.54M	$47.33M
YoY Change	-23.29%	14.99%	7.81%
Interest Expense	-$10.50M	-$9.000M	-$10.30M
YoY Change	16.67%	4.65%	19.77%
% of Operating Profit	-51.58%	-33.92%	-21.76%
Other Income/Expense, Net	$1.800M	-$3.100M	-$841.0K
YoY Change	-158.06%	-875.0%	2236.11%
Pretax Income	$14.50M	$23.10M	$47.70M
YoY Change	-37.23%	-15.07%	-8.27%
Income Tax	$124.2M	-$39.60M	$11.48M
% Of Pretax Income	856.55%	-171.43%	24.07%
Net Earnings	$11.34M	$15.37M	$36.17M
YoY Change	-26.24%	1.72%	2.51%
Net Earnings / Revenue	6.41%	8.82%	17.26%
Basic Earnings Per Share			$0.75
Diluted Earnings Per Share	$0.24	$0.32	$0.75
COMMON SHARES
Basic Shares Outstanding			48.07M shares
Diluted Shares Outstanding			48.07M shares

Balance Sheet

Concept	2019 Q4	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$42.70M	$47.20M	$66.40M
YoY Change	-9.53%	-50.21%	134.63%
Cash & Equivalents	$42.65M	$47.18M	$66.42M
Short-Term Investments
Other Short-Term Assets	$22.71M	$18.57M	$19.14M
YoY Change	22.31%	5.24%	1.33%
Inventory	$7.700M	$6.600M	$6.600M
Prepaid Expenses
Receivables	$32.06M	$30.04M	$50.79M
Other Receivables	$29.10M	$29.10M	$33.50M
Total Short-Term Assets	$184.7M	$188.7M	$235.5M
YoY Change	-2.11%	-17.19%	30.5%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.410B	$2.233B	$2.186B
YoY Change	7.94%	9.02%	10.28%
Goodwill	$2.959M	$2.615M	$2.615M
YoY Change	13.15%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$84.29M	$60.10M	$64.67M
YoY Change	40.26%	-1.12%	11.12%
Total Long-Term Assets	$2.927B	$2.649B	$2.641B
YoY Change	10.48%	5.25%	9.03%
TOTAL ASSETS
Total Short-Term Assets	$184.7M	$188.7M	$235.5M
Total Long-Term Assets	$2.927B	$2.649B	$2.641B
Total Assets	$3.111B	$2.838B	$2.877B
YoY Change	9.64%	3.39%	10.52%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$108.5M	$95.58M	$102.9M
YoY Change	13.48%	1.73%	15.15%
Accrued Expenses	$48.80M	$43.40M	$55.70M
YoY Change	12.44%	-7.07%	0.72%
Deferred Revenue	$3.325M	$3.196M
YoY Change	4.04%
Short-Term Debt	$175.1M	$65.10M	$75.10M
YoY Change	168.97%	-76.34%	-61.51%
Long-Term Debt Due	$21.87M	$104.9M	$104.8M
YoY Change	-79.16%	558.99%	191.02%
Total Short-Term Liabilities	$358.7M	$321.2M	$381.9M
YoY Change	11.69%	-34.58%	0.4%
LONG-TERM LIABILITIES
Long-Term Debt	$786.8M	$710.0M	$714.3M
YoY Change	10.81%	37.66%	37.45%
Other Long-Term Liabilities	$60.42M	$45.25M	$869.5M
YoY Change	33.53%	1.86%	26.79%
Total Long-Term Liabilities	$847.2M	$755.3M	$714.3M
YoY Change	12.17%	34.82%	37.45%
TOTAL LIABILITIES
Total Short-Term Liabilities	$358.7M	$321.2M	$381.9M
Total Long-Term Liabilities	$847.2M	$755.3M	$714.3M
Total Liabilities	$1.206B	$1.076B	$1.096B
YoY Change	12.03%	2.4%	21.79%
SHAREHOLDERS EQUITY
Retained Earnings	$417.1M	$392.1M	$385.7M
YoY Change	6.4%	8.15%	9.66%
Common Stock	$362.8M	$338.1M	$337.4M
YoY Change	7.29%	0.41%	0.43%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$779.9M	$730.2M	$723.1M
YoY Change
Total Liabilities & Shareholders Equity	$3.111B	$2.838B	$2.877B
YoY Change	9.64%	3.39%	10.52%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$11.34M	$15.37M	$36.17M
YoY Change	-26.24%	1.72%	2.51%
Depreciation, Depletion And Amortization	$22.80M	$21.60M	$21.50M
YoY Change	5.56%	10.2%	9.14%
Cash From Operating Activities	$40.50M	$59.50M	$69.90M
YoY Change	-31.93%	56.58%	-5.67%
INVESTING ACTIVITIES
Capital Expenditures	-$78.90M	-$58.80M	-$79.00M
YoY Change	34.18%	-25.38%	10.18%
Acquisitions
YoY Change
Other Investing Activities	$0.00	$0.00	-$1.400M
YoY Change		-100.0%	-12.5%
Cash From Investing Activities	-$78.80M	-$58.80M	-$80.40M
YoY Change	34.01%	147.06%	9.69%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	29.80M	-20.00M	43.30M
YoY Change	-249.0%	-138.83%	-3192.86%
NET CHANGE
Cash From Operating Activities	40.50M	59.50M	69.90M
Cash From Investing Activities	-78.80M	-58.80M	-80.40M
Cash From Financing Activities	29.80M	-20.00M	43.30M
Net Change In Cash	-8.500M	-19.30M	32.80M
YoY Change	-55.96%	-129.38%	-5566.67%
FREE CASH FLOW
Cash From Operating Activities	$40.50M	$59.50M	$69.90M
Capital Expenditures	-$78.90M	-$58.80M	-$79.00M
Free Cash Flow	$119.4M	$118.3M	$148.9M
YoY Change	0.93%	1.28%	2.13%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
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CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	68000000	shares
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CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-13883
CY2019	dei	Entity Registrant Name EntityRegistrantName	CALIFORNIA WATER SERVICE GROUP
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	77-0448994
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	1720 North First Street
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	San Jose,
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95112
CY2019	dei	City Area Code CityAreaCode	408
CY2019	dei	Local Phone Number LocalPhoneNumber	367-8200
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
CY2019	dei	Trading Symbol TradingSymbol	CWT
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
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CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2017	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	9588000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	6685000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3954000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3750000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	28000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	50000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	663000	USD
CY2019	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	1391000	USD
CY2018	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	-2717000	USD
CY2017	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	1548000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4925000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-7102000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-215000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	44891000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	39917000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	36288000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	3670000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2063000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.36
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2360000	USD
CY2019	us-gaap	Interest Costs Incurred InterestCostsIncurred	41221000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	37854000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	33928000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	63116000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	65584000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	72940000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.31
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.31
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48168000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48060000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48009000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48168000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48060000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48009000	shares
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	659471000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	72940000	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2878000	USD
CY2017	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1505000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	34563000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	699221000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	65584000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	3040000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1645000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	36043000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	730157000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	63116000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	27153000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2497000	USD
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	38023000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	779906000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	63116000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	65584000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	72940000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	91288000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	85707000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	78592000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	744000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1099000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	920000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-15346000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-20909000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-21087000	USD
CY2019	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	5104000	USD
CY2018	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	-2334000	USD
CY2017	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3058000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	6685000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3954000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3750000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	6731000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	3141000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	3118000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	28000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	50000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	663000	USD
CY2019	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	698000	USD
CY2018	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	410000	USD
CY2017	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	1293000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	4580000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-20422000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	31871000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	1452000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	3671000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	4528000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3545000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	587000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3718000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	10719000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4701000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1564000	USD
CY2019	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	1282000	USD
CY2018	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-4382000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	2164000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-264000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	12644000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-13752000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	168794000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	179019000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	147842000	USD
CY2019	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	273770000	USD
CY2018	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	271707000	USD
CY2017	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	259194000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	28000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	59000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	666000	USD
CY2019	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	0	USD
CY2018	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	0	USD
CY2017	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	56004000	USD
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3491000	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1558000	USD
CY2019	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	2216000	USD
CY2018	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	4925000	USD
CY2017	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	5605000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-275958000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-273082000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-206571000	USD
CY2019	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	260000000	USD
CY2018	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	151000000	USD
CY2017	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	265000000	USD
CY2019	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	150000000	USD
CY2018	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	361000000	USD
CY2017	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	87000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	398204000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	299383000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2019	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	27774000	USD
CY2018	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	18612000	USD
CY2017	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	21369000	USD
CY2019	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	7566000	USD
CY2018	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	7297000	USD
CY2017	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	8378000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	405568000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	16532000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	26829000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2497000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1645000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	69365000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1505000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	20423000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	38023000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	36043000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	34563000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	102747000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	46478000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	128094000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4417000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-47585000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47715000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95300000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	25935000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43298000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47715000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95300000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	40980000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	35941000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	32223000	USD
CY2019	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	0	USD
CY2018	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	0	USD
CY2017	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1697000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Payables Assumed1 NoncashOrPartNoncashAcquisitionPayablesAssumed1	40794000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Payables Assumed1 NoncashOrPartNoncashAcquisitionPayablesAssumed1	38807000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Payables Assumed1 NoncashOrPartNoncashAcquisitionPayablesAssumed1	41017000	USD
CY2019	cwt	Utility Plant Contribution By Developers UtilityPlantContributionByDevelopers	16288000	USD
CY2018	cwt	Utility Plant Contribution By Developers UtilityPlantContributionByDevelopers	20609000	USD
CY2017	cwt	Utility Plant Contribution By Developers UtilityPlantContributionByDevelopers	19898000	USD
CY2019	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	13968000	USD
CY2018	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	32315000	USD
CY2017	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	2420000	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	664358000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	674736000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	622474000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	50199000	USD
CY2018	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	23460000	USD
CY2017	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	53639000	USD
CY2019	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	714557000	USD
CY2018	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	698196000	USD
CY2017	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	676113000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	664358000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	674736000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	622474000	USD
CY2019	cwt	Maximum Collection Period In Which Deferred Net Wram And Mcba Revenues And Associated Costs Will Be Recognized MaximumCollectionPeriodInWhichDeferredNetWRAMAndMCBARevenuesAndAssociatedCostsWillBeRecognized	P24M
CY2019	cwt	Maximum Collection Period In Which Deferred Net Wram And Mcba Revenues And Associated Costs Will Be Recognized MaximumCollectionPeriodInWhichDeferredNetWRAMAndMCBARevenuesAndAssociatedCostsWillBeRecognized	P24M
CY2019Q4	us-gaap	Lessor Operating Lease Renewal Term LessorOperatingLeaseRenewalTerm	P15Y
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	1211000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	725000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	2772000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	2012000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	411000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	585000	USD
CY2019Q4	cwt	Accounts Receivable From Developers Current AccountsReceivableFromDevelopersCurrent	6299000	USD
CY2018Q4	cwt	Accounts Receivable From Developers Current AccountsReceivableFromDevelopersCurrent	9633000	USD
CY2019Q4	cwt	Other Nontrade Receivables Current OtherNontradeReceivablesCurrent	7888000	USD
CY2018Q4	cwt	Other Nontrade Receivables Current OtherNontradeReceivablesCurrent	7468000	USD
CY2019Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	14187000	USD
CY2018Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	17101000	USD
CY2019	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0296
CY2018	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0302
CY2017	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0300
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	6685000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3954000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3750000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	3670000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2063000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2360000	USD
CY2019	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	10355000	USD
CY2018	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	6017000	USD
CY2017	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	6110000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	25600000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	24300000	USD
CY2019	cwt	Deposit Assets Cash Collected Through Surcharge On Customers Bills DepositAssetsCashCollectedThroughSurchargeOnCustomersBills	600000	USD
CY2018	cwt	Deposit Assets Cash Collected Through Surcharge On Customers Bills DepositAssetsCashCollectedThroughSurchargeOnCustomersBills	500000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42653000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	47176000	USD
CY2019Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	645000	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	539000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43298000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47715000	USD
CY2019Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	433322000	USD
CY2018Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	353569000	USD
CY2019Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	211413000	USD
CY2018Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	211275000	USD
CY2019	cwt	Minimum Collection Period After Net Receivable Balances Were Recognized In Which The Company Defers Net Wra Mand Mcba Operating Revenues And Associated Costs MinimumCollectionPeriodAfterNetReceivableBalancesWereRecognizedInWhichTheCompanyDefersNetWRAMandMCBAOperatingRevenuesAndAssociatedCosts	P12M
CY2019Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	38200000	USD
CY2018Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	42400000	USD
CY2019Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	4500000	USD
CY2018Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	12200000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	700000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1100000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	900000	USD
CY2019Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	191100000	USD
CY2018Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	186300000	USD
CY2019	cwt	Customer Advances For Construction Specified Refund Period CustomerAdvancesForConstructionSpecifiedRefundPeriod	P40Y
CY2019Q4	cwt	Customer Advances For Construction Refunds Due Year One CustomerAdvancesForConstructionRefundsDueYearOne	7628000	USD
CY2019Q4	cwt	Customer Advances For Construction Refunds Due Year Two CustomerAdvancesForConstructionRefundsDueYearTwo	7627000	USD
CY2019Q4	cwt	Customer Advances For Construction Refunds Due Year Three CustomerAdvancesForConstructionRefundsDueYearThree	7627000	USD
CY2019Q4	cwt	Customer Advances For Construction Refunds Due Year Four CustomerAdvancesForConstructionRefundsDueYearFour	7627000	USD
CY2019Q4	cwt	Customer Advances For Construction Refunds Due Year Five CustomerAdvancesForConstructionRefundsDueYearFive	7627000	USD
CY2019Q4	cwt	Customer Advances For Construction Refunds Due Thereafter CustomerAdvancesForConstructionRefundsDueThereafter	152926000	USD
CY2019Q4	cwt	Customer Advances For Construction Refunds Due CustomerAdvancesForConstructionRefundsDue	191062000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	63116000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	65584000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	72940000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48168000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48060000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48009000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48168000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48060000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48009000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.31
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.36
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.31
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2019	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	19205000	USD
CY2019	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	13869000	USD
CY2018	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	18272000	USD
CY2018	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	22787000	USD
CY2017	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	15898000	USD
CY2017	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	9390000	USD
CY2018	us-gaap	Other Research And Development Expense OtherResearchAndDevelopmentExpense	5400000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	21079000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	13955000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	7124000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	20967000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	12893000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8074000	USD
CY2019Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	3776000	USD
CY2019Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	3776000	USD
CY2018Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	3776000	USD
CY2018Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	3776000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1500000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1700000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1600000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	958000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	870000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	747000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	569000	USD
CY2019Q1	cwt	Preferred Stock Shares Retired PreferredStockSharesRetired	221000	shares
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	446000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	3534000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	7124000	USD
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	48532199	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	48064707	shares
CY2019Q4	cwt	Sale Of Stock Equity Distribution Period SaleOfStockEquityDistributionPeriod	P3Y
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	4693000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	3762000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	808622000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	814938000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	21868000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	104911000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	786754000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	710027000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17671000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	22543000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	20229000	USD
CY2019Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	6241000	USD
CY2018Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	5896000	USD
CY2019Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	2024000	USD
CY2018Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	1915000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	3325000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	3196000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1452000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2988000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2270000	USD
CY2019Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	38573000	USD
CY2018Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	33506000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	15582000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15869000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	15995000	USD
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-123000	USD
CY2019	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	2089000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15582000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2086000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	17668000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15995000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-126000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15872000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	35881000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	943000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	36824000	USD
CY2017	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	35881000	USD
CY2017	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	946000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36827000	USD
CY2019	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	70000000.0	USD
CY2018	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	102000000.0	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	85900000	USD
CY2019Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	0	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16965000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	17105000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	38419000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5639000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5685000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6017000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-3696000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-5954000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4584000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	USD
CY2019	cwt	Effective Income Tax Rate Reconciliation Afudc Equity Amount EffectiveIncomeTaxRateReconciliationAFUDCEquityAmount	1870000	USD
CY2018	cwt	Effective Income Tax Rate Reconciliation Afudc Equity Amount EffectiveIncomeTaxRateReconciliationAFUDCEquityAmount	1106000	USD
CY2017	cwt	Effective Income Tax Rate Reconciliation Afudc Equity Amount EffectiveIncomeTaxRateReconciliationAFUDCEquityAmount	1528000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	302000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-278000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-581000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	405000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	494000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-842000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17671000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15872000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36827000	USD
CY2017Q4	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	108000000.0	USD
CY2018Q4	cwt	Tax Cutsand Jobs Actof2017 Incomplete Accounting Ratepayer Net Refund TaxCutsandJobsActof2017IncompleteAccountingRatepayerNetRefund	121000000.0	USD
CY2018Q4	cwt	Tax Cutsand Jobs Actof2017 Refund Gross Up TaxCutsandJobsActof2017RefundGrossUp	47000000.0	USD
CY2018Q4	cwt	Tax Cutsand Jobs Actof2017 Regulatory Liabilities TaxCutsandJobsActof2017RegulatoryLiabilities	168000000.0	USD
CY2018Q4	cwt	Tax Cutsand Jobs Actof2017 Incomplete Accounting Ratepayer Net Refund TaxCutsandJobsActof2017IncompleteAccountingRatepayerNetRefund	121000000.0	USD
CY2019Q4	cwt	Deferred Tax Assets Developer Deposits For Extension Agreements And Contributions In Aid Of Construction DeferredTaxAssetsDeveloperDepositsForExtensionAgreementsAndContributionsInAidOfConstruction	25114000	USD
CY2018Q4	cwt	Deferred Tax Assets Developer Deposits For Extension Agreements And Contributions In Aid Of Construction DeferredTaxAssetsDeveloperDepositsForExtensionAgreementsAndContributionsInAidOfConstruction	39074000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	11029000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	8257000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	10095000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	8725000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	47196000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	44072000	USD
CY2019Q4	cwt	Deferred Tax Asset Operating Lease Liability DeferredTaxAssetOperatingLeaseLiability	4024000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2975000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4273000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	100433000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	104401000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	297470000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	288544000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	17771000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	26348000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	4030000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3752000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2542000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	323023000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	317434000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	222590000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	213033000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9716000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11058000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10499000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	1292000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1787000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	559000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	3129000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11008000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9716000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11058000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3100000	USD
CY2019	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.20
CY2019	cwt	Defined Contribution Plan Employer Matching Contribution On Dollar For Participant Contributions DefinedContributionPlanEmployerMatchingContributionOnDollarForParticipantContributions	0.75	USD
CY2019	cwt	Defined Contribution Plan Maximum Employer Contribution As Percentage Of Compensation DefinedContributionPlanMaximumEmployerContributionAsPercentageOfCompensation	0.060
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6500000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6000000.0	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5600000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.070
CY2019	cwt	Defined Benefit Plan Health Care Cost Trend Rate Assumed By Specified Period DefinedBenefitPlanHealthCareCostTrendRateAssumedBySpecifiedPeriod	0.053
CY2019Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.043
CY2019	cwt	Defined Benefit Plan Period In Which Rate Reaches Ultimate Trend Rate DefinedBenefitPlanPeriodInWhichRateReachesUltimateTrendRate	P50Y
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	3610000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	2650000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	33945000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	25757000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2000000	shares
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6500000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3100000	USD
CY2019	cwt	Fair Value Inputs Risk Premium FairValueInputsRiskPremium	0.0183
CY2019Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P25Y
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	14402000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1452000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	12928000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	14380000	USD
CY2019Q4	cwt	Finance Lease Right Of Use Asset Gross FinanceLeaseRightOfUseAssetGross	18207000	USD
CY2019Q4	cwt	Finance Lease Right Of Use Asset Accumulated Depreciation FinanceLeaseRightOfUseAssetAccumulatedDepreciation	9644000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8563000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	680000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	5205000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	5885000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P152M
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P76M
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.037
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.055
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	1874000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1210000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	347000	USD
CY2019	cwt	Finance Lease Cost Total FinanceLeaseCostTotal	1557000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1700000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	264000	USD
CY2019	us-gaap	Lease Cost LeaseCost	5395000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	1820000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	347000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	672000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2109000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	672000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1951000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	986000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1734000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	987000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1578000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	987000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1459000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1506000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1318000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	940000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	10205000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	1645000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	18245000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	7051000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3865000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	1166000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	14380000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	5885000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1771000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1709000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1485000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1355000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1261000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	10538000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	18119000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2000000.0	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2500000	USD
CY2019Q1	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	126111000	USD
CY2019Q2	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	179031000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	20356000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-7640000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	16996000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	42424000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	11336000	USD
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.16
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2019Q3	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	232537000	USD
CY2019Q4	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	176878000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	476000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	27013000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	51567000	USD
CY2019Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1975
CY2019Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1975
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1975
CY2019Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1975
CY2018Q1	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	134553000	USD
CY2018Q2	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	174938000	USD
CY2018Q3	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	221288000	USD
CY2018Q4	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	167417000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	9836000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	26839000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	47329000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	26536000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-762000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	14805000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	36173000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	15368000	USD
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.02
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2018Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2018Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2018Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2018Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42653000	USD
CY2019Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	119349000	USD
CY2019Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	22710000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	184712000	USD
CY2019Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	433322000	USD
CY2019Q4	us-gaap	Investments In And Advances To Affiliates Amount Of Equity InvestmentsInAndAdvancesToAffiliatesAmountOfEquity	0	USD
CY2019Q4	us-gaap	Notes Receivable Related Parties Noncurrent NotesReceivableRelatedPartiesNoncurrent	0	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	86904000	USD
CY2019Q4	cwt	Total Other Assets TotalOtherAssets	520226000	USD
CY2019Q4	us-gaap	Assets Assets	3111308000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	3550485000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1144115000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	2406370000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	779906000	USD
CY2019Q4	cwt	Affiliate Long Term Debt AffiliateLongTermDebt	0	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	786754000	USD
CY2019Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	1566660000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	21868000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	175100000	USD
CY2019Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2019Q4	cwt	Accounts Payable Including Regulatory Liability Current AccountsPayableIncludingRegulatoryLiabilityCurrent	108463000	USD
CY2019Q4	cwt	Accrued Expenses And Other Liabilities Including Accrued Interest AccruedExpensesAndOtherLiabilitiesIncludingAccruedInterest	53290000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	358721000	USD
CY2019Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	1575000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	222590000	USD
CY2019Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	258907000	USD
CY2019Q4	cwt	Regulatory And Other Liabilities RegulatoryAndOtherLiabilities	270256000	USD
CY2019Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	191062000	USD
CY2019Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	241537000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3111308000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	3229446000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	996723000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	2232723000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	47176000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	122959000	USD
CY2018Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	18567000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	188702000	USD
CY2018Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	353569000	USD
CY2018Q4	us-gaap	Investments In And Advances To Affiliates Amount Of Equity InvestmentsInAndAdvancesToAffiliatesAmountOfEquity	0	USD
CY2018Q4	us-gaap	Notes Receivable Related Parties Noncurrent NotesReceivableRelatedPartiesNoncurrent	0	USD
CY2018Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	62710000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	63116000	USD
CY2018	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	698196000	USD
CY2018	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	207103000	USD
CY2018	cwt	Costof Power CostofPower	31080000	USD
CY2018	us-gaap	Pump Taxes PumpTaxes	14664000	USD
CY2018Q4	cwt	Total Other Assets TotalOtherAssets	416279000	USD
CY2018Q4	us-gaap	Assets Assets	2837704000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	730157000	USD
CY2018Q4	cwt	Affiliate Long Term Debt AffiliateLongTermDebt	0	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	710027000	USD
CY2018Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	1440184000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	104911000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	65100000	USD
CY2018Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2018Q4	cwt	Accounts Payable Including Regulatory Liability Current AccountsPayableIncludingRegulatoryLiabilityCurrent	95580000	USD
CY2018Q4	cwt	Accrued Expenses And Other Liabilities Including Accrued Interest AccruedExpensesAndOtherLiabilitiesIncludingAccruedInterest	55575000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	321166000	USD
CY2018Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	1649000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	213033000	USD
CY2018Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	193538000	USD
CY2018Q4	cwt	Regulatory And Other Liabilities RegulatoryAndOtherLiabilities	256522000	USD
CY2018Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	186342000	USD
CY2018Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	225270000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2837704000	USD
CY2019	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	714557000	USD
CY2019	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	212461000	USD
CY2019	cwt	Costof Power CostofPower	31362000	USD
CY2019	us-gaap	Pump Taxes PumpTaxes	11518000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	108617000	USD
CY2019	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	90061000	USD
CY2019	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	26834000	USD
CY2019	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	89220000	USD
CY2019	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	16280000	USD
CY2019	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	28792000	USD
CY2019	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	615145000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	99412000	USD
CY2019	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	19205000	USD
CY2019	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	13869000	USD
CY2019	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	5733000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	6685000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	28000	USD
CY2019	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	1391000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4925000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	44891000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	3670000	USD
CY2019	us-gaap	Interest Costs Incurred InterestCostsIncurred	41221000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	100781000	USD
CY2018	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	79868000	USD
CY2018	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	24494000	USD
CY2018	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	83781000	USD
CY2018	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	18589000	USD
CY2018	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	27296000	USD
CY2018	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	587656000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	110540000	USD
CY2018	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	18272000	USD
CY2018	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	22787000	USD
CY2018	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	9308000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3954000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	50000	USD
CY2018	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	-2717000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-7102000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	39917000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2063000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	37854000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	65584000	USD
CY2017	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	676113000	USD
CY2017	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	199081000	USD
CY2017	cwt	Costof Power CostofPower	28862000	USD
CY2017	us-gaap	Pump Taxes PumpTaxes	13924000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	93326000	USD
CY2017	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	74448000	USD
CY2017	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	22530000	USD
CY2017	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	76783000	USD
CY2017	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	35279000	USD
CY2017	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	24797000	USD
CY2017	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	569030000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	107083000	USD
CY2017	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	15898000	USD
CY2017	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	9390000	USD
CY2017	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	9588000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3750000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	663000	USD
CY2017	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	1548000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-215000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	36288000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2360000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	33928000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	72940000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	63116000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	0	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	91288000	USD
CY2019	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	5104000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	6731000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	28000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-15346000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	6685000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-2424000	USD
CY2019	cwt	Increase Decrease In Other Noncurrent Assets And Liabilities Net Including Amortization Of Debt Premium And Expenses IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNetIncludingAmortizationOfDebtPremiumAndExpenses	-1706000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	168794000	USD
CY2019	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	273770000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	28000	USD
CY2019	cwt	Investment In Affiliates InvestmentInAffiliates	0	USD
CY2019	cwt	Payments For Proceeds From Investment In And Advances To Affiliate Related To Investing Activities PaymentsForProceedsFromInvestmentInAndAdvancesToAffiliateRelatedToInvestingActivities	0	USD
CY2019	cwt	Proceedsfrom Issuanceof Shortterm Debtfrom Affiliate ProceedsfromIssuanceofShorttermDebtfromAffiliate	0	USD
CY2019	cwt	Paymentsfor Long Term Debtfrom Affiliate PaymentsforLongTermDebtfromAffiliate	0	USD
CY2019	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	2216000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-275958000	USD
CY2019	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	260000000	USD
CY2019	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	150000000	USD
CY2019	cwt	Investments From Affiliates InvestmentsFromAffiliates	0	USD
CY2019	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2019	cwt	Proceedsfrom Affiliate Short Term Borrowings ProceedsfromAffiliateShortTermBorrowings		USD
CY2019	cwt	Paymentsfor Affiliate Longterm Debt PaymentsforAffiliateLongtermDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	398204000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	405568000	USD
CY2019	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	27774000	USD
CY2019	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	7566000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	20423000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2497000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	38023000	USD
CY2019	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	102747000	USD
CY2018	cwt	Paymentsfor Long Term Debtfrom Affiliate PaymentsforLongTermDebtfromAffiliate	0	USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3491000	USD
CY2018	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	4925000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-273082000	USD
CY2018	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	151000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4417000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47715000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43298000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	65584000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	0	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	85707000	USD
CY2018	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	-2334000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	3141000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	50000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-20909000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3954000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-16483000	USD
CY2018	cwt	Increase Decrease In Other Noncurrent Assets And Liabilities Net Including Amortization Of Debt Premium And Expenses IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNetIncludingAmortizationOfDebtPremiumAndExpenses	11135000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	179019000	USD
CY2018	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	271707000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	59000	USD
CY2018	cwt	Payments For Proceeds From Investment In And Advances To Affiliate Related To Investing Activities PaymentsForProceedsFromInvestmentInAndAdvancesToAffiliateRelatedToInvestingActivities	0	USD
CY2018	cwt	Proceedsfrom Issuanceof Shortterm Debtfrom Affiliate ProceedsfromIssuanceofShorttermDebtfromAffiliate	0	USD
CY2018	cwt	Paymentsfor Shortterm Debtfrom Affiliate PaymentsforShorttermDebtfromAffiliate	0	USD
CY2018	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	361000000	USD
CY2018	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2018	cwt	Proceedsfrom Affiliate Short Term Borrowings ProceedsfromAffiliateShortTermBorrowings	0	USD
CY2018	cwt	Paymentsfor Affiliate Short Term Borrowings PaymentsforAffiliateShortTermBorrowings	0	USD
CY2018	cwt	Paymentsfor Affiliate Longterm Debt PaymentsforAffiliateLongtermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	299383000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	16532000	USD
CY2018	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	18612000	USD
CY2018	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	7297000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1645000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	36043000	USD
CY2018	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	46478000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-47585000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95300000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47715000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	72940000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2017	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	0	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	78592000	USD
CY2017	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3058000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	3118000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	663000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-21087000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3750000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	36389000	USD
CY2017	cwt	Increase Decrease In Other Noncurrent Assets And Liabilities Net Including Amortization Of Debt Premium And Expenses IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNetIncludingAmortizationOfDebtPremiumAndExpenses	-15965000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	147842000	USD
CY2017	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	259194000	USD
CY2017	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	56004000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	666000	USD
CY2017	cwt	Payments For Proceeds From Investment In And Advances To Affiliate Related To Investing Activities PaymentsForProceedsFromInvestmentInAndAdvancesToAffiliateRelatedToInvestingActivities	0	USD
CY2017	cwt	Proceedsfrom Issuanceof Shortterm Debtfrom Affiliate ProceedsfromIssuanceofShorttermDebtfromAffiliate	0	USD
CY2017	cwt	Paymentsfor Long Term Debtfrom Affiliate PaymentsforLongTermDebtfromAffiliate	0	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1558000	USD
CY2017	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	5605000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-206571000	USD
CY2017	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	265000000	USD
CY2017	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	87000000	USD
CY2017	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2017	cwt	Proceedsfrom Affiliate Short Term Borrowings ProceedsfromAffiliateShortTermBorrowings	0	USD
CY2017	cwt	Paymentsfor Affiliate Longterm Debt PaymentsforAffiliateLongtermDebt	0	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	26829000	USD
CY2017	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	21369000	USD
CY2017	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	8378000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1505000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	34563000	USD
CY2017	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	128094000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	69365000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	25935000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95300000	USD

Files In Submission

Name	View Source	Status
0001035201-20-000002-index-headers.html	Edgar Link	pending
0001035201-20-000002-index.html	Edgar Link	pending
0001035201-20-000002.txt	Edgar Link	pending
0001035201-20-000002-xbrl.zip	Edgar Link	pending
chart-4dcc85e7d04d5825a3a.jpg	Edgar Link	pending
cwt-12312019x10k.htm	Edgar Link	pending
cwt-12312019x10k_htm.xml	Edgar Link	completed
cwt-20191231.xsd	Edgar Link	pending
cwt-20191231xex11.htm	Edgar Link	pending
cwt-20191231xex21.htm	Edgar Link	pending
cwt-20191231xex231.htm	Edgar Link	pending
cwt-20191231xex311.htm	Edgar Link	pending
cwt-20191231xex312.htm	Edgar Link	pending
cwt-20191231xex32.htm	Edgar Link	pending
cwt-20191231xex421.htm	Edgar Link	pending
cwt-20191231_cal.xml	Edgar Link	unprocessable
cwt-20191231_def.xml	Edgar Link	unprocessable
cwt-20191231_lab.xml	Edgar Link	unprocessable
cwt-20191231_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt

2019 Q4 Form 10-K Financial Statement

#000103520120000002 Filed on February 27, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CWT CALIFORNIA WATER SERVICE GROUP Stock $cwt

2019 Q4 Form 10-K Financial Statement

#000103520120000002 Filed on February 27, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt