10-Q Filing

CALIFORNIA WATER SERVICE GROUP CIK: 1035201 Q3 2025

Filing Information

Form Type	10-Q
Accession Number	`0001035201-25-000039`
Period End Date	20250930
Filing Date	20251030
Fiscal Year	2025
Fiscal Period	Q3
XBRL Instance	cwt-20250930_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 184 Income Statement 208 Cash Flow Statement 160 Comprehensive Income 72

Balance Sheet 184 line items

Line Item	Tag	Value	Unit	Period
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	136.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	136.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	136.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	136.00M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	59.48M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	59.48M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	59.59M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	59.59M	shares	Point-in-time
Utility plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.40B	USD	Point-in-time
Utility plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.40B	USD	Point-in-time
Utility plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.76B	USD	Point-in-time
Utility plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.76B	USD	Point-in-time
Less accumulated depreciation and amortization	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$1.24B	USD	Point-in-time
Less accumulated depreciation and amortization	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$1.24B	USD	Point-in-time
Less accumulated depreciation and amortization	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$1.32B	USD	Point-in-time
Less accumulated depreciation and amortization	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$1.32B	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$4.16B	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$4.16B	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$4.44B	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$4.44B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$50.12M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$50.12M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$75.99M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$75.99M	USD	Point-in-time
Restricted cash	`RestrictedCashCurrent`	$45.57M	USD	Point-in-time
Restricted cash	`RestrictedCashCurrent`	$45.57M	USD	Point-in-time
Restricted cash	`RestrictedCashCurrent`	$45.62M	USD	Point-in-time
Restricted cash	`RestrictedCashCurrent`	$45.62M	USD	Point-in-time
Customers, net	`AccountsReceivableNetCurrent`	$58.59M	USD	Point-in-time
Customers, net	`AccountsReceivableNetCurrent`	$58.59M	USD	Point-in-time
Customers, net	`AccountsReceivableNetCurrent`	$79.99M	USD	Point-in-time
Customers, net	`AccountsReceivableNetCurrent`	$79.99M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryAssetsCurrent`	$55.92M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryAssetsCurrent`	$55.92M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryAssetsCurrent`	$74.03M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryAssetsCurrent`	$74.03M	USD	Point-in-time
Other, net	`NontradeReceivablesCurrent`	$33.98M	USD	Point-in-time
Other, net	`NontradeReceivablesCurrent`	$33.98M	USD	Point-in-time
Other, net	`NontradeReceivablesCurrent`	$19.42M	USD	Point-in-time
Other, net	`NontradeReceivablesCurrent`	$19.42M	USD	Point-in-time
Accrued and unbilled revenue, net	`ReceivablesLongTermContractsOrPrograms`	$39.72M	USD	Point-in-time
Accrued and unbilled revenue, net	`ReceivablesLongTermContractsOrPrograms`	$39.72M	USD	Point-in-time
Accrued and unbilled revenue, net	`ReceivablesLongTermContractsOrPrograms`	$61.65M	USD	Point-in-time
Accrued and unbilled revenue, net	`ReceivablesLongTermContractsOrPrograms`	$61.65M	USD	Point-in-time
Materials and supplies	`PublicUtilitiesInventory`	$20.51M	USD	Point-in-time
Materials and supplies	`PublicUtilitiesInventory`	$20.51M	USD	Point-in-time
Materials and supplies	`PublicUtilitiesInventory`	$20.07M	USD	Point-in-time
Materials and supplies	`PublicUtilitiesInventory`	$20.07M	USD	Point-in-time
Taxes, prepaid expenses, and other assets	`TaxesPrepaidExpensesAndOtherAssetsCurrent`	$19.74M	USD	Point-in-time
Taxes, prepaid expenses, and other assets	`TaxesPrepaidExpensesAndOtherAssetsCurrent`	$19.74M	USD	Point-in-time
Taxes, prepaid expenses, and other assets	`TaxesPrepaidExpensesAndOtherAssetsCurrent`	$22.55M	USD	Point-in-time
Taxes, prepaid expenses, and other assets	`TaxesPrepaidExpensesAndOtherAssetsCurrent`	$22.55M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$324.14M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$324.14M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$399.31M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$399.31M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$357.41M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$357.41M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$326.52M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$326.52M	USD	Point-in-time
Goodwill	`Goodwill`	$37.06M	USD	Point-in-time
Goodwill	`Goodwill`	$37.06M	USD	Point-in-time
Goodwill	`Goodwill`	$37.06M	USD	Point-in-time
Goodwill	`Goodwill`	$37.06M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$302.97M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$302.97M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$312.52M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$312.52M	USD	Point-in-time
Total other assets	`TotalOtherAssets`	$697.44M	USD	Point-in-time
Total other assets	`TotalOtherAssets`	$697.44M	USD	Point-in-time
Total other assets	`TotalOtherAssets`	$676.10M	USD	Point-in-time
Total other assets	`TotalOtherAssets`	$676.10M	USD	Point-in-time
TOTAL ASSETS	`Assets`	$5.18B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$5.18B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$5.52B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$5.52B	USD	Point-in-time
Common stock, $0.01 par value; 136,000 shares authorized, 59,591 and 59,484 outstanding on September 30, 2025 and December 31, 2024, respectively	`CommonStockValue`	$595.00K	USD	Point-in-time
Common stock, $0.01 par value; 136,000 shares authorized, 59,591 and 59,484 outstanding on September 30, 2025 and December 31, 2024, respectively	`CommonStockValue`	$595.00K	USD	Point-in-time
Common stock, $0.01 par value; 136,000 shares authorized, 59,591 and 59,484 outstanding on September 30, 2025 and December 31, 2024, respectively	`CommonStockValue`	$596.00K	USD	Point-in-time
Common stock, $0.01 par value; 136,000 shares authorized, 59,591 and 59,484 outstanding on September 30, 2025 and December 31, 2024, respectively	`CommonStockValue`	$596.00K	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$966.98M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$966.98M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$970.96M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$970.96M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$674.92M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$674.92M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$735.67M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$735.67M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-7.22M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-7.22M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-6.75M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-6.75M	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$3.02M	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$3.02M	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$2.42M	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$2.42M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.43B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.43B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.55B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.55B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.63B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.63B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.64B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.64B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.66B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.66B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.70B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.70B	USD	Point-in-time
Long-term debt, net	`LongTermDebtAndCapitalLeaseObligations`	$1.10B	USD	Point-in-time
Long-term debt, net	`LongTermDebtAndCapitalLeaseObligations`	$1.10B	USD	Point-in-time
Long-term debt, net	`LongTermDebtAndCapitalLeaseObligations`	$1.10B	USD	Point-in-time
Long-term debt, net	`LongTermDebtAndCapitalLeaseObligations`	$1.10B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$2.74B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$2.74B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$2.81B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$2.81B	USD	Point-in-time
Current maturities of long-term debt, net	`LongTermDebtCurrent`	$72.42M	USD	Point-in-time
Current maturities of long-term debt, net	`LongTermDebtCurrent`	$72.42M	USD	Point-in-time
Current maturities of long-term debt, net	`LongTermDebtCurrent`	$72.49M	USD	Point-in-time
Current maturities of long-term debt, net	`LongTermDebtCurrent`	$72.49M	USD	Point-in-time
Short-term borrowings	`ShortTermBorrowings`	$205.00M	USD	Point-in-time
Short-term borrowings	`ShortTermBorrowings`	$205.00M	USD	Point-in-time
Short-term borrowings	`ShortTermBorrowings`	$345.00M	USD	Point-in-time
Short-term borrowings	`ShortTermBorrowings`	$345.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$167.53M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$167.53M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$188.18M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$188.18M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryLiabilityCurrent`	$22.65M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryLiabilityCurrent`	$22.65M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryLiabilityCurrent`	$23.44M	USD	Point-in-time
Regulatory balancing accounts	`RegulatoryLiabilityCurrent`	$23.44M	USD	Point-in-time
Accrued other taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$6.08M	USD	Point-in-time
Accrued other taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$6.08M	USD	Point-in-time
Accrued other taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$17.89M	USD	Point-in-time
Accrued other taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$17.89M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$8.41M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$8.41M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$19.48M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$19.48M	USD	Point-in-time
Other accrued liabilities	`AccruedLiabilitiesAndOtherLiabilities`	$56.27M	USD	Point-in-time
Other accrued liabilities	`AccruedLiabilitiesAndOtherLiabilities`	$56.27M	USD	Point-in-time
Other accrued liabilities	`AccruedLiabilitiesAndOtherLiabilities`	$63.45M	USD	Point-in-time
Other accrued liabilities	`AccruedLiabilitiesAndOtherLiabilities`	$63.45M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$538.36M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$538.36M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$729.92M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$729.92M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$411.08M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$411.08M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$407.56M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$407.56M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$814.55M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$814.55M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$870.62M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$870.62M	USD	Point-in-time
Pension	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$81.67M	USD	Point-in-time
Pension	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$81.67M	USD	Point-in-time
Pension	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$82.43M	USD	Point-in-time
Pension	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$82.43M	USD	Point-in-time
Advances for construction	`ContractWithCustomerRefundLiabilityNoncurrent`	$202.61M	USD	Point-in-time
Advances for construction	`ContractWithCustomerRefundLiabilityNoncurrent`	$202.61M	USD	Point-in-time
Advances for construction	`ContractWithCustomerRefundLiabilityNoncurrent`	$210.41M	USD	Point-in-time
Advances for construction	`ContractWithCustomerRefundLiabilityNoncurrent`	$210.41M	USD	Point-in-time
Contributions in aid of construction	`ContributionsInAidOfConstruction`	$294.97M	USD	Point-in-time
Contributions in aid of construction	`ContributionsInAidOfConstruction`	$294.97M	USD	Point-in-time
Contributions in aid of construction	`ContributionsInAidOfConstruction`	$295.65M	USD	Point-in-time
Contributions in aid of construction	`ContributionsInAidOfConstruction`	$295.65M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$94.18M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$94.18M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$116.11M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$116.11M	USD	Point-in-time
Commitments and contingencies (Note 9)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (Note 9)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (Note 9)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (Note 9)	`CommitmentsAndContingencies`	-	USD	Point-in-time
TOTAL CAPITALIZATION AND LIABILITIES	`LiabilitiesAndStockholdersEquity`	$5.18B	USD	Point-in-time
TOTAL CAPITALIZATION AND LIABILITIES	`LiabilitiesAndStockholdersEquity`	$5.18B	USD	Point-in-time
TOTAL CAPITALIZATION AND LIABILITIES	`LiabilitiesAndStockholdersEquity`	$5.52B	USD	Point-in-time
TOTAL CAPITALIZATION AND LIABILITIES	`LiabilitiesAndStockholdersEquity`	$5.52B	USD	Point-in-time

Income Statement 208 line items

Line Item	Tag	Value	Unit	Period
Operating revenue	`RegulatedOperatingRevenueWater`	$299.56M	USD	1 Quarter
Operating revenue	`RegulatedOperatingRevenueWater`	$299.56M	USD	1 Quarter
Operating revenue	`RegulatedOperatingRevenueWater`	$814.61M	USD	3 Qtrs
Operating revenue	`RegulatedOperatingRevenueWater`	$814.61M	USD	3 Qtrs
Operating revenue	`RegulatedOperatingRevenueWater`	$311.24M	USD	1 Quarter
Operating revenue	`RegulatedOperatingRevenueWater`	$311.24M	USD	1 Quarter
Operating revenue	`RegulatedOperatingRevenueWater`	$780.16M	USD	3 Qtrs
Operating revenue	`RegulatedOperatingRevenueWater`	$780.16M	USD	3 Qtrs
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$95.09M	USD	1 Quarter
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$95.09M	USD	1 Quarter
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$236.92M	USD	3 Qtrs
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$236.92M	USD	3 Qtrs
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$102.70M	USD	1 Quarter
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$102.70M	USD	1 Quarter
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$251.20M	USD	3 Qtrs
Water production costs	`UtilitiesOperatingExpenseProductsAndServices`	$251.20M	USD	3 Qtrs
Administrative and general	`GeneralAndAdministrativeExpense`	$35.45M	USD	1 Quarter
Administrative and general	`GeneralAndAdministrativeExpense`	$35.45M	USD	1 Quarter
Administrative and general	`GeneralAndAdministrativeExpense`	$103.09M	USD	3 Qtrs
Administrative and general	`GeneralAndAdministrativeExpense`	$103.09M	USD	3 Qtrs
Administrative and general	`GeneralAndAdministrativeExpense`	$36.24M	USD	1 Quarter
Administrative and general	`GeneralAndAdministrativeExpense`	$36.24M	USD	1 Quarter
Administrative and general	`GeneralAndAdministrativeExpense`	$103.73M	USD	3 Qtrs
Administrative and general	`GeneralAndAdministrativeExpense`	$103.73M	USD	3 Qtrs
Other operations	`UtilitiesOperatingExpenseOther`	$33.62M	USD	1 Quarter
Other operations	`UtilitiesOperatingExpenseOther`	$33.62M	USD	1 Quarter
Other operations	`UtilitiesOperatingExpenseOther`	$86.17M	USD	3 Qtrs
Other operations	`UtilitiesOperatingExpenseOther`	$86.17M	USD	3 Qtrs
Other operations	`UtilitiesOperatingExpenseOther`	$33.45M	USD	1 Quarter
Other operations	`UtilitiesOperatingExpenseOther`	$33.45M	USD	1 Quarter
Other operations	`UtilitiesOperatingExpenseOther`	$93.99M	USD	3 Qtrs
Other operations	`UtilitiesOperatingExpenseOther`	$93.99M	USD	3 Qtrs
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$9.26M	USD	1 Quarter
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$9.26M	USD	1 Quarter
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$26.06M	USD	3 Qtrs
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$26.06M	USD	3 Qtrs
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$9.81M	USD	1 Quarter
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$9.81M	USD	1 Quarter
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$26.52M	USD	3 Qtrs
Maintenance	`UtilitiesOperatingExpenseMaintenance`	$26.52M	USD	3 Qtrs
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$33.06M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$33.06M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$98.89M	USD	3 Qtrs
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$98.89M	USD	3 Qtrs
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$36.12M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$36.12M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$108.10M	USD	3 Qtrs
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$108.10M	USD	3 Qtrs
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$15.48M	USD	1 Quarter
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$15.48M	USD	1 Quarter
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$39.71M	USD	3 Qtrs
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$39.71M	USD	3 Qtrs
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$10.64M	USD	1 Quarter
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$10.64M	USD	1 Quarter
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$18.59M	USD	3 Qtrs
Income taxes	`UtilitiesOperatingExpenseIncomeTaxExpenseBenefit`	$18.59M	USD	3 Qtrs
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$10.84M	USD	1 Quarter
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$10.84M	USD	1 Quarter
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$30.96M	USD	3 Qtrs
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$30.96M	USD	3 Qtrs
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$11.66M	USD	1 Quarter
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$11.66M	USD	1 Quarter
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$33.27M	USD	3 Qtrs
Property and other taxes	`UtilitiesOperatingExpenseTaxes`	$33.27M	USD	3 Qtrs
Total operating expenses	`UtilitiesOperatingExpense`	$232.81M	USD	1 Quarter
Total operating expenses	`UtilitiesOperatingExpense`	$232.81M	USD	1 Quarter
Total operating expenses	`UtilitiesOperatingExpense`	$621.80M	USD	3 Qtrs
Total operating expenses	`UtilitiesOperatingExpense`	$621.80M	USD	3 Qtrs
Total operating expenses	`UtilitiesOperatingExpense`	$240.62M	USD	1 Quarter
Total operating expenses	`UtilitiesOperatingExpense`	$240.62M	USD	1 Quarter
Total operating expenses	`UtilitiesOperatingExpense`	$635.39M	USD	3 Qtrs
Total operating expenses	`UtilitiesOperatingExpense`	$635.39M	USD	3 Qtrs
Net operating income	`OperatingIncomeLoss`	$66.75M	USD	1 Quarter
Net operating income	`OperatingIncomeLoss`	$66.75M	USD	1 Quarter
Net operating income	`OperatingIncomeLoss`	$192.81M	USD	3 Qtrs
Net operating income	`OperatingIncomeLoss`	$192.81M	USD	3 Qtrs
Net operating income	`OperatingIncomeLoss`	$70.61M	USD	1 Quarter
Net operating income	`OperatingIncomeLoss`	$70.61M	USD	1 Quarter
Net operating income	`OperatingIncomeLoss`	$144.77M	USD	3 Qtrs
Net operating income	`OperatingIncomeLoss`	$144.77M	USD	3 Qtrs
Non-regulated revenue	`UnregulatedOperatingRevenue`	$4.13M	USD	1 Quarter
Non-regulated revenue	`UnregulatedOperatingRevenue`	$4.13M	USD	1 Quarter
Non-regulated revenue	`UnregulatedOperatingRevenue`	$14.74M	USD	3 Qtrs
Non-regulated revenue	`UnregulatedOperatingRevenue`	$14.74M	USD	3 Qtrs
Non-regulated revenue	`UnregulatedOperatingRevenue`	$5.35M	USD	1 Quarter
Non-regulated revenue	`UnregulatedOperatingRevenue`	$5.35M	USD	1 Quarter
Non-regulated revenue	`UnregulatedOperatingRevenue`	$15.34M	USD	3 Qtrs
Non-regulated revenue	`UnregulatedOperatingRevenue`	$15.34M	USD	3 Qtrs
Non-regulated expenses	`OtherNonoperatingExpense`	$934.00K	USD	1 Quarter
Non-regulated expenses	`OtherNonoperatingExpense`	$934.00K	USD	1 Quarter
Non-regulated expenses	`OtherNonoperatingExpense`	$7.01M	USD	3 Qtrs
Non-regulated expenses	`OtherNonoperatingExpense`	$7.01M	USD	3 Qtrs
Non-regulated expenses	`OtherNonoperatingExpense`	$2.46M	USD	1 Quarter
Non-regulated expenses	`OtherNonoperatingExpense`	$2.46M	USD	1 Quarter
Non-regulated expenses	`OtherNonoperatingExpense`	$8.79M	USD	3 Qtrs
Non-regulated expenses	`OtherNonoperatingExpense`	$8.79M	USD	3 Qtrs
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-4.45M	USD	1 Quarter
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-4.45M	USD	1 Quarter
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-12.06M	USD	3 Qtrs
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-12.06M	USD	3 Qtrs
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-4.55M	USD	1 Quarter
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-4.55M	USD	1 Quarter
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-13.94M	USD	3 Qtrs
Other components of net periodic benefit credit	`DefinedBenefitPlanOtherCosts`	$-13.94M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$1.69M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$1.69M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.25M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.25M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$2.15M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$2.15M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.84M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.84M	USD	3 Qtrs
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$1.94M	USD	1 Quarter
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$1.94M	USD	1 Quarter
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$4.57M	USD	3 Qtrs
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$4.57M	USD	3 Qtrs
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$1.96M	USD	1 Quarter
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$1.96M	USD	1 Quarter
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$5.42M	USD	3 Qtrs
Income taxes on other income and expenses	`UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit`	$5.42M	USD	3 Qtrs
Net other income	`OtherNonoperatingIncomeExpense`	$7.40M	USD	1 Quarter
Net other income	`OtherNonoperatingIncomeExpense`	$7.40M	USD	1 Quarter
Net other income	`OtherNonoperatingIncomeExpense`	$20.48M	USD	3 Qtrs
Net other income	`OtherNonoperatingIncomeExpense`	$20.48M	USD	3 Qtrs
Net other income	`OtherNonoperatingIncomeExpense`	$7.63M	USD	1 Quarter
Net other income	`OtherNonoperatingIncomeExpense`	$7.63M	USD	1 Quarter
Net other income	`OtherNonoperatingIncomeExpense`	$20.91M	USD	3 Qtrs
Net other income	`OtherNonoperatingIncomeExpense`	$20.91M	USD	3 Qtrs
Interest expense	`InterestExpenseNonoperating`	$14.38M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$14.38M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$45.02M	USD	3 Qtrs
Interest expense	`InterestExpenseNonoperating`	$45.02M	USD	3 Qtrs
Interest expense	`InterestExpenseNonoperating`	$18.11M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$18.11M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$52.09M	USD	3 Qtrs
Interest expense	`InterestExpenseNonoperating`	$52.09M	USD	3 Qtrs
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$788.00K	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$788.00K	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.36M	USD	3 Qtrs
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.36M	USD	3 Qtrs
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$988.00K	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$988.00K	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.77M	USD	3 Qtrs
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.77M	USD	3 Qtrs
Net interest expense	`InterestCostsIncurred`	$13.60M	USD	1 Quarter
Net interest expense	`InterestCostsIncurred`	$13.60M	USD	1 Quarter
Net interest expense	`InterestCostsIncurred`	$42.67M	USD	3 Qtrs
Net interest expense	`InterestCostsIncurred`	$42.67M	USD	3 Qtrs
Net interest expense	`InterestCostsIncurred`	$17.12M	USD	1 Quarter
Net interest expense	`InterestCostsIncurred`	$17.12M	USD	1 Quarter
Net interest expense	`InterestCostsIncurred`	$49.31M	USD	3 Qtrs
Net interest expense	`InterestCostsIncurred`	$49.31M	USD	3 Qtrs
Net income	`ProfitLoss`	$60.55M	USD	1 Quarter
Net income	`ProfitLoss`	$60.55M	USD	1 Quarter
Net income	`ProfitLoss`	$170.62M	USD	3 Qtrs
Net income	`ProfitLoss`	$170.62M	USD	3 Qtrs
Net income	`ProfitLoss`	$61.12M	USD	1 Quarter
Net income	`ProfitLoss`	$61.12M	USD	1 Quarter
Net income	`ProfitLoss`	$116.37M	USD	3 Qtrs
Net income	`ProfitLoss`	$116.37M	USD	3 Qtrs
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-126.00K	USD	1 Quarter
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-126.00K	USD	1 Quarter
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-527.00K	USD	3 Qtrs
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-527.00K	USD	3 Qtrs
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-114.00K	USD	1 Quarter
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-114.00K	USD	1 Quarter
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-361.00K	USD	3 Qtrs
Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-361.00K	USD	3 Qtrs
Net income attributable to California Water Service Group	`NetIncomeLoss`	$60.68M	USD	1 Quarter
Net income attributable to California Water Service Group	`NetIncomeLoss`	$60.68M	USD	1 Quarter
Net income attributable to California Water Service Group	`NetIncomeLoss`	$171.15M	USD	3 Qtrs
Net income attributable to California Water Service Group	`NetIncomeLoss`	$171.15M	USD	3 Qtrs
Net income attributable to California Water Service Group	`NetIncomeLoss`	$61.23M	USD	1 Quarter
Net income attributable to California Water Service Group	`NetIncomeLoss`	$61.23M	USD	1 Quarter
Net income attributable to California Water Service Group	`NetIncomeLoss`	$116.73M	USD	3 Qtrs
Net income attributable to California Water Service Group	`NetIncomeLoss`	$116.73M	USD	3 Qtrs
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.03	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.03	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$2.93	USD	3 Qtrs
Basic (in dollars per share)	`EarningsPerShareBasic`	$2.93	USD	3 Qtrs
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.03	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.03	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.96	USD	3 Qtrs
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.96	USD	3 Qtrs
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.03	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.03	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.93	USD	3 Qtrs
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.93	USD	3 Qtrs
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.03	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.03	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.96	USD	3 Qtrs
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.96	USD	3 Qtrs
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	58.93M	shares	1 Quarter
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	58.93M	shares	1 Quarter
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	58.32M	shares	3 Qtrs
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	58.32M	shares	3 Qtrs
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	59.59M	shares	1 Quarter
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	59.59M	shares	1 Quarter
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	59.56M	shares	3 Qtrs
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	59.56M	shares	3 Qtrs
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	58.98M	shares	1 Quarter
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	58.98M	shares	1 Quarter
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	58.36M	shares	3 Qtrs
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	58.36M	shares	3 Qtrs
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	59.65M	shares	1 Quarter
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	59.65M	shares	1 Quarter
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	59.62M	shares	3 Qtrs
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	59.62M	shares	3 Qtrs

Cash Flow Statement 160 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$60.55M	USD	1 Quarter
Net income	`ProfitLoss`	$60.55M	USD	1 Quarter
Net income	`ProfitLoss`	$170.62M	USD	3 Qtrs
Net income	`ProfitLoss`	$170.62M	USD	3 Qtrs
Net income	`ProfitLoss`	$61.12M	USD	1 Quarter
Net income	`ProfitLoss`	$61.12M	USD	1 Quarter
Net income	`ProfitLoss`	$116.37M	USD	3 Qtrs
Net income	`ProfitLoss`	$116.37M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$100.54M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$100.54M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$109.72M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$109.72M	USD	3 Qtrs
Change in value of life insurance contracts	`LifeInsuranceCorporateOrBankOwnedChangeInValue`	$4.92M	USD	3 Qtrs
Change in value of life insurance contracts	`LifeInsuranceCorporateOrBankOwnedChangeInValue`	$4.92M	USD	3 Qtrs
Change in value of life insurance contracts	`LifeInsuranceCorporateOrBankOwnedChangeInValue`	$3.10M	USD	3 Qtrs
Change in value of life insurance contracts	`LifeInsuranceCorporateOrBankOwnedChangeInValue`	$3.10M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$1.69M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$1.69M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.25M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.25M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$2.15M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$2.15M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.84M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$5.84M	USD	3 Qtrs
Receivables and accrued and unbilled revenue	`IncreaseDecreaseInReceivables`	$64.25M	USD	3 Qtrs
Receivables and accrued and unbilled revenue	`IncreaseDecreaseInReceivables`	$64.25M	USD	3 Qtrs
Receivables and accrued and unbilled revenue	`IncreaseDecreaseInReceivables`	$33.49M	USD	3 Qtrs
Receivables and accrued and unbilled revenue	`IncreaseDecreaseInReceivables`	$33.49M	USD	3 Qtrs
Water Arrearages Payment Program cash received	`IncreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	$-83.04M	USD	3 Qtrs
Water Arrearages Payment Program cash received	`IncreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	$-83.04M	USD	3 Qtrs
Water Arrearages Payment Program cash received	`IncreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	-	USD	3 Qtrs
Water Arrearages Payment Program cash received	`IncreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	-	USD	3 Qtrs
Water Arrearages Payment Program cash returned	`DecreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	$-25.17M	USD	3 Qtrs
Water Arrearages Payment Program cash returned	`DecreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	$-25.17M	USD	3 Qtrs
Water Arrearages Payment Program cash returned	`DecreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	-	USD	3 Qtrs
Water Arrearages Payment Program cash returned	`DecreaseInAllowanceForCreditLossesWaterArrearagesPaymentProgram`	-	USD	3 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$10.05M	USD	3 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$10.05M	USD	3 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$7.22M	USD	3 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$7.22M	USD	3 Qtrs
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$6.31M	USD	3 Qtrs
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$6.31M	USD	3 Qtrs
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$2.14M	USD	3 Qtrs
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$2.14M	USD	3 Qtrs
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$36.57M	USD	3 Qtrs
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$36.57M	USD	3 Qtrs
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$27.87M	USD	3 Qtrs
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$27.87M	USD	3 Qtrs
Other changes in noncurrent assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$72.13M	USD	3 Qtrs
Other changes in noncurrent assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$72.13M	USD	3 Qtrs
Other changes in noncurrent assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-38.05M	USD	3 Qtrs
Other changes in noncurrent assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-38.05M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$222.78M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$222.78M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$254.66M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$254.66M	USD	3 Qtrs
Utility plant expenditures	`PaymentsToAcquireWaterAndWasteWaterSystems`	$332.16M	USD	3 Qtrs
Utility plant expenditures	`PaymentsToAcquireWaterAndWasteWaterSystems`	$332.16M	USD	3 Qtrs
Utility plant expenditures	`PaymentsToAcquireWaterAndWasteWaterSystems`	$364.70M	USD	3 Qtrs
Utility plant expenditures	`PaymentsToAcquireWaterAndWasteWaterSystems`	$364.70M	USD	3 Qtrs
Life insurance proceeds	`ProceedsFromLifeInsurancePolicies`	$1.43M	USD	3 Qtrs
Life insurance proceeds	`ProceedsFromLifeInsurancePolicies`	$1.43M	USD	3 Qtrs
Life insurance proceeds	`ProceedsFromLifeInsurancePolicies`	-	USD	3 Qtrs
Life insurance proceeds	`ProceedsFromLifeInsurancePolicies`	-	USD	3 Qtrs
Purchase of life insurance contracts	`PaymentsToAcquireLifeInsurancePolicies`	$3.94M	USD	3 Qtrs
Purchase of life insurance contracts	`PaymentsToAcquireLifeInsurancePolicies`	$3.94M	USD	3 Qtrs
Purchase of life insurance contracts	`PaymentsToAcquireLifeInsurancePolicies`	$3.36M	USD	3 Qtrs
Purchase of life insurance contracts	`PaymentsToAcquireLifeInsurancePolicies`	$3.36M	USD	3 Qtrs
Asset acquisition	`PaymentsForAssetAcquisitions`	$252.00K	USD	3 Qtrs
Asset acquisition	`PaymentsForAssetAcquisitions`	$252.00K	USD	3 Qtrs
Asset acquisition	`PaymentsForAssetAcquisitions`	-	USD	3 Qtrs
Asset acquisition	`PaymentsForAssetAcquisitions`	-	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-48.00K	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-48.00K	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-207.00K	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-207.00K	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-334.88M	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-334.88M	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-367.86M	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-367.86M	USD	3 Qtrs
Short-term borrowings	`ProceedsFromShortTermDebt`	$370.00M	USD	3 Qtrs
Short-term borrowings	`ProceedsFromShortTermDebt`	$370.00M	USD	3 Qtrs
Short-term borrowings	`ProceedsFromShortTermDebt`	$420.00M	USD	3 Qtrs
Short-term borrowings	`ProceedsFromShortTermDebt`	$420.00M	USD	3 Qtrs
Repayment of short-term borrowings	`RepaymentsOfShortTermDebt`	$290.00M	USD	3 Qtrs
Repayment of short-term borrowings	`RepaymentsOfShortTermDebt`	$290.00M	USD	3 Qtrs
Repayment of short-term borrowings	`RepaymentsOfShortTermDebt`	$280.00M	USD	3 Qtrs
Repayment of short-term borrowings	`RepaymentsOfShortTermDebt`	$280.00M	USD	3 Qtrs
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$679.00K	USD	3 Qtrs
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$679.00K	USD	3 Qtrs
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$679.00K	USD	3 Qtrs
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$679.00K	USD	3 Qtrs
Advances and contributions in aid of construction	`ProceedsFromContributionInAidOfConstructionFinancingActivities`	$19.12M	USD	3 Qtrs
Advances and contributions in aid of construction	`ProceedsFromContributionInAidOfConstructionFinancingActivities`	$19.12M	USD	3 Qtrs
Advances and contributions in aid of construction	`ProceedsFromContributionInAidOfConstructionFinancingActivities`	$28.28M	USD	3 Qtrs
Advances and contributions in aid of construction	`ProceedsFromContributionInAidOfConstructionFinancingActivities`	$28.28M	USD	3 Qtrs
Refunds of advances for construction	`RefundsOfAdvancesForConstruction`	$7.10M	USD	3 Qtrs
Refunds of advances for construction	`RefundsOfAdvancesForConstruction`	$7.10M	USD	3 Qtrs
Refunds of advances for construction	`RefundsOfAdvancesForConstruction`	$7.12M	USD	3 Qtrs
Refunds of advances for construction	`RefundsOfAdvancesForConstruction`	$7.12M	USD	3 Qtrs
Per- and polyfluoroalkyl substances (PFAS) settlement proceeds	`ProceedsFromInsuranceSettlementFinancingActivities`	-	USD	3 Qtrs
Per- and polyfluoroalkyl substances (PFAS) settlement proceeds	`ProceedsFromInsuranceSettlementFinancingActivities`	-	USD	3 Qtrs
Per- and polyfluoroalkyl substances (PFAS) settlement proceeds	`ProceedsFromInsuranceSettlementFinancingActivities`	$34.83M	USD	3 Qtrs
Per- and polyfluoroalkyl substances (PFAS) settlement proceeds	`ProceedsFromInsuranceSettlementFinancingActivities`	$34.83M	USD	3 Qtrs
Repurchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$1.34M	USD	3 Qtrs
Repurchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$1.34M	USD	3 Qtrs
Repurchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$1.33M	USD	3 Qtrs
Repurchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$1.33M	USD	3 Qtrs
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$88.46M	USD	3 Qtrs
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$88.46M	USD	3 Qtrs
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$1.90M	USD	3 Qtrs
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$1.90M	USD	3 Qtrs
Dividends paid	`PaymentsOfDividendsCommonStock`	$48.81M	USD	3 Qtrs
Dividends paid	`PaymentsOfDividendsCommonStock`	$48.81M	USD	3 Qtrs
Dividends paid	`PaymentsOfDividendsCommonStock`	$55.97M	USD	3 Qtrs
Dividends paid	`PaymentsOfDividendsCommonStock`	$55.97M	USD	3 Qtrs
Distribution to noncontrolling interest	`PaymentsToMinorityShareholders`	$489.00K	USD	3 Qtrs
Distribution to noncontrolling interest	`PaymentsToMinorityShareholders`	$489.00K	USD	3 Qtrs
Distribution to noncontrolling interest	`PaymentsToMinorityShareholders`	$790.00K	USD	3 Qtrs
Distribution to noncontrolling interest	`PaymentsToMinorityShareholders`	$790.00K	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$3.16M	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$3.16M	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	-	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	-	USD	3 Qtrs
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$132.33M	USD	3 Qtrs
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$132.33M	USD	3 Qtrs
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$139.13M	USD	3 Qtrs
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$139.13M	USD	3 Qtrs
Change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$20.23M	USD	3 Qtrs
Change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$20.23M	USD	3 Qtrs
Change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$25.92M	USD	3 Qtrs
Change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$25.92M	USD	3 Qtrs
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$84.97M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$84.97M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$105.20M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$105.20M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$95.69M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$95.69M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$121.61M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$121.61M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$84.97M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$84.97M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$105.20M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$105.20M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$95.69M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$95.69M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$121.61M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$121.61M	USD	Point-in-time
Cash paid for interest (net of amounts capitalized)	`InterestPaidNet`	$32.10M	USD	3 Qtrs
Cash paid for interest (net of amounts capitalized)	`InterestPaidNet`	$32.10M	USD	3 Qtrs
Cash paid for interest (net of amounts capitalized)	`InterestPaidNet`	$37.68M	USD	3 Qtrs
Cash paid for interest (net of amounts capitalized)	`InterestPaidNet`	$37.68M	USD	3 Qtrs
Accrued payables for investments in utility plant	`CapitalExpendituresIncurredButNotYetPaid`	$57.42M	USD	3 Qtrs
Accrued payables for investments in utility plant	`CapitalExpendituresIncurredButNotYetPaid`	$57.42M	USD	3 Qtrs
Accrued payables for investments in utility plant	`CapitalExpendituresIncurredButNotYetPaid`	$60.51M	USD	3 Qtrs
Accrued payables for investments in utility plant	`CapitalExpendituresIncurredButNotYetPaid`	$60.51M	USD	3 Qtrs
Utility plant contribution by developers	`NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1`	$22.01M	USD	3 Qtrs
Utility plant contribution by developers	`NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1`	$22.01M	USD	3 Qtrs
Utility plant contribution by developers	`NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1`	$23.43M	USD	3 Qtrs
Utility plant contribution by developers	`NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1`	$23.43M	USD	3 Qtrs

Comprehensive Income 72 line items

Line Item	Tag	Value	Unit	Period
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$3.82M	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$3.82M	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$3.82M	USD	3 Qtrs
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$3.82M	USD	3 Qtrs
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	3 Qtrs
Unrecoverable pension benefit plan costs, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	3 Qtrs
Net income	`ProfitLoss`	$60.55M	USD	1 Quarter
Net income	`ProfitLoss`	$60.55M	USD	1 Quarter
Net income	`ProfitLoss`	$170.62M	USD	3 Qtrs
Net income	`ProfitLoss`	$170.62M	USD	3 Qtrs
Net income	`ProfitLoss`	$61.12M	USD	1 Quarter
Net income	`ProfitLoss`	$61.12M	USD	1 Quarter
Net income	`ProfitLoss`	$116.37M	USD	3 Qtrs
Net income	`ProfitLoss`	$116.37M	USD	3 Qtrs
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$250.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$250.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$250.00K	USD	3 Qtrs
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$250.00K	USD	3 Qtrs
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$60.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$60.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$180.00K	USD	3 Qtrs
Amortization of defined benefit pension plans, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$180.00K	USD	3 Qtrs
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$3.82M	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$3.82M	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-9.84M	USD	3 Qtrs
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-9.84M	USD	3 Qtrs
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Unrecoverable pension benefit plan costs, net of tax of $0, $3,823, $0, and $3,823, respectively	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$48.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$48.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$643.00K	USD	3 Qtrs
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$643.00K	USD	3 Qtrs
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$154.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$154.00K	USD	1 Quarter
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$462.00K	USD	3 Qtrs
Amortization of defined benefit pension plans, net of tax of $60, $250, $180, and $250, respectively	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$462.00K	USD	3 Qtrs
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.87M	USD	1 Quarter
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.87M	USD	1 Quarter
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-9.20M	USD	3 Qtrs
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-9.20M	USD	3 Qtrs
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$154.00K	USD	1 Quarter
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$154.00K	USD	1 Quarter
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$462.00K	USD	3 Qtrs
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$462.00K	USD	3 Qtrs
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$64.42M	USD	1 Quarter
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$64.42M	USD	1 Quarter
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$161.42M	USD	3 Qtrs
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$161.42M	USD	3 Qtrs
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$61.27M	USD	1 Quarter
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$61.27M	USD	1 Quarter
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$116.83M	USD	3 Qtrs
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$116.83M	USD	3 Qtrs
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-126.00K	USD	1 Quarter
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-126.00K	USD	1 Quarter
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-527.00K	USD	3 Qtrs
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-527.00K	USD	3 Qtrs
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-114.00K	USD	1 Quarter
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-114.00K	USD	1 Quarter
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-361.00K	USD	3 Qtrs
Comprehensive loss attributable to noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-361.00K	USD	3 Qtrs
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$64.55M	USD	1 Quarter
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$64.55M	USD	1 Quarter
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$161.95M	USD	3 Qtrs
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$161.95M	USD	3 Qtrs
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$61.38M	USD	1 Quarter
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$61.38M	USD	1 Quarter
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$117.19M	USD	3 Qtrs
Comprehensive income attributable to California Water Service Group	`ComprehensiveIncomeNetOfTax`	$117.19M	USD	3 Qtrs

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.