10-K Filing

AMERICAN STATES WATER CO CIK: 1056903 FY 2023

Filing Information

Form Type	10-K
Accession Number	`0001628280-24-005922`
Period End Date	20231231
Filing Date	20240221
Fiscal Year	2023
Fiscal Period	FY
XBRL Instance	awr-20231231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 123 Income Statement 90 Cash Flow Statement 107 Stockholders Equity 33

Balance Sheet 123 line items

Line Item	Tag	Value	Unit	Period
Water	`UtilitiesWaterPropertyPlantAndEquipmentGross`	$2.01B	USD	Point-in-time
Water	`UtilitiesWaterPropertyPlantAndEquipmentGross`	$2.08B	USD	Point-in-time
Electric	`UtilitiesElectricPropertyPlantAndEquipmentGross`	$133.81M	USD	Point-in-time
Electric	`UtilitiesElectricPropertyPlantAndEquipmentGross`	$156.47M	USD	Point-in-time
Total	`UtilitiesPropertyPlantAndEquipmentGross`	$2.14B	USD	Point-in-time
Total	`UtilitiesPropertyPlantAndEquipmentGross`	$2.24B	USD	Point-in-time
Non-regulated utility property, at cost	`NonUtilitiesPropertyPlantAndEquipmentGross`	$40.22M	USD	Point-in-time
Non-regulated utility property, at cost	`NonUtilitiesPropertyPlantAndEquipmentGross`	$38.07M	USD	Point-in-time
Total utility plant, at cost	`PropertyPlantAndEquipmentGross`	$2.28B	USD	Point-in-time
Total utility plant, at cost	`PropertyPlantAndEquipmentGross`	$2.18B	USD	Point-in-time
Less accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$624.47M	USD	Point-in-time
Less accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$606.23M	USD	Point-in-time
Utility plant before construction work in progress	`PropertyPlantAndEquipmentBeforeConstructionWorkInProgress`	$1.66B	USD	Point-in-time
Utility plant before construction work in progress	`PropertyPlantAndEquipmentBeforeConstructionWorkInProgress`	$1.57B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$181.65M	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$237.13M	USD	Point-in-time
Net utility plant	`PropertyPlantAndEquipmentNet`	$1.63B	USD	Point-in-time
Net utility plant	`PropertyPlantAndEquipmentNet`	$1.75B	USD	Point-in-time
Net utility plant	`PropertyPlantAndEquipmentNet`	$1.89B	USD	Point-in-time
Goodwill	`Goodwill`	$1.12M	USD	Point-in-time
Goodwill	`Goodwill`	$1.12M	USD	Point-in-time
Other property and investments	`PropertyPlantAndEquipmentAndInvestmentsOtherNet`	$36.91M	USD	Point-in-time
Other property and investments	`PropertyPlantAndEquipmentAndInvestmentsOtherNet`	$42.93M	USD	Point-in-time
Total other property and investments	`PropertyPlantAndEquipmentAndInvestmentsOtherAndGoodwillNet`	$44.05M	USD	Point-in-time
Total other property and investments	`PropertyPlantAndEquipmentAndInvestmentsOtherAndGoodwillNet`	$38.02M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$6.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$14.07M	USD	Point-in-time
Accounts receivable customers, less allowance for doubtful accounts	`AccountsReceivableNetCurrent`	$34.25M	USD	Point-in-time
Accounts receivable customers, less allowance for doubtful accounts	`AccountsReceivableNetCurrent`	$26.21M	USD	Point-in-time
Unbilled receivable (Note 2)	`UnbilledReceivablesCurrent`	$23.52M	USD	Point-in-time
Unbilled receivable (Note 2)	`UnbilledReceivablesCurrent`	$20.66M	USD	Point-in-time
Receivable from U.S. government, less allowance for doubtful accounts (Note 2)	`AccountsReceivableFromUSGovernmentNetCurrent`	$49.31M	USD	Point-in-time
Receivable from U.S. government, less allowance for doubtful accounts (Note 2)	`AccountsReceivableFromUSGovernmentNetCurrent`	$34.97M	USD	Point-in-time
Other accounts receivable, less allowance for doubtful accounts	`AccountsAndOtherReceivablesNetCurrent`	$4.21M	USD	Point-in-time
Other accounts receivable, less allowance for doubtful accounts	`AccountsAndOtherReceivablesNetCurrent`	$6.34M	USD	Point-in-time
Income taxes receivable	`IncomeTaxesReceivable`	$3.90M	USD	Point-in-time
Income taxes receivable	`IncomeTaxesReceivable`	$52.00K	USD	Point-in-time
Materials and supplies	`InventoryRawMaterialsAndSupplies`	$14.62M	USD	Point-in-time
Materials and supplies	`InventoryRawMaterialsAndSupplies`	$17.57M	USD	Point-in-time
Regulatory assets current	`RegulatoryAssetsCurrent`	$14.03M	USD	Point-in-time
Regulatory assets current	`RegulatoryAssetsCurrent`	$45.14M	USD	Point-in-time
Prepayments and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$5.77M	USD	Point-in-time
Prepayments and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$5.45M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossCurrent`	$9.96M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossCurrent`	$9.39M	USD	Point-in-time
Purchase power contract derivatives at fair value	`EnergyMarketingContractsAssetsCurrent`	-	USD	Point-in-time
Purchase power contract derivatives at fair value	`EnergyMarketingContractsAssetsCurrent`	$11.85M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$205.98M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$151.29M	USD	Point-in-time
Unbilled revenue, receivable from U.S government	`UnbilledReceivablesNotBillableAtBalanceSheetDate`	$6.46M	USD	Point-in-time
Unbilled revenue, receivable from U.S government	`UnbilledReceivablesNotBillableAtBalanceSheetDate`	$4.89M	USD	Point-in-time
Receivable from U.S. government (Note 2)	`AccountReceivablefromUSGovernmentNetNoncurrent`	$50.48M	USD	Point-in-time
Receivable from U.S. government (Note 2)	`AccountReceivablefromUSGovernmentNetNoncurrent`	$42.18M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossNoncurrent`	$5.59M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossNoncurrent`	$4.42M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$9.54M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$7.98M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$25.59M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$5.69M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$13.53M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$18.76M	USD	Point-in-time
Total other assets	`RegulatoryAndOtherAssets`	$91.29M	USD	Point-in-time
Total other assets	`RegulatoryAndOtherAssets`	$103.82M	USD	Point-in-time
Total Assets	`Assets`	$2.03B	USD	Point-in-time
Total Assets	`Assets`	$2.25B	USD	Point-in-time
Common shareholders equity	`StockholdersEquity`	$685.95M	USD	Point-in-time
Common shareholders equity	`StockholdersEquity`	$709.55M	USD	Point-in-time
Common shareholders equity	`StockholdersEquity`	$776.11M	USD	Point-in-time
Common shareholders equity	`StockholdersEquity`	$641.67M	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$446.55M	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$575.55M	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$1.16B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$1.35B	USD	Point-in-time
Notes payable to bank	`NotesPayableToBankCurrent`	$255.50M	USD	Point-in-time
Notes payable to bank	`NotesPayableToBankCurrent`	$42.00M	USD	Point-in-time
Long-term debt current	`OtherNotesPayableCurrent`	$353.00K	USD	Point-in-time
Long-term debt current	`OtherNotesPayableCurrent`	$399.00K	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$68.70M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$84.85M	USD	Point-in-time
Income taxes payable	`TaxesPayableCurrent`	$492.00K	USD	Point-in-time
Income taxes payable	`TaxesPayableCurrent`	$1.85M	USD	Point-in-time
Accrued other taxes	`FranchiseAndAssessmentFeesTaxes`	$16.26M	USD	Point-in-time
Accrued other taxes	`FranchiseAndAssessmentFeesTaxes`	$14.65M	USD	Point-in-time
Accrued employee expenses	`EmployeeRelatedLiabilitiesCurrent`	$14.74M	USD	Point-in-time
Accrued employee expenses	`EmployeeRelatedLiabilitiesCurrent`	$14.00M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$8.61M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$5.31M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$4.57M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	-	USD	Point-in-time
Contract liabilities (Note 2)	`ContractWithCustomerLiabilityCurrent`	$903.00K	USD	Point-in-time
Contract liabilities (Note 2)	`ContractWithCustomerLiabilityCurrent`	$1.35M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityCurrent`	$1.86M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityCurrent`	$1.89M	USD	Point-in-time
Purchase power contract derivative at fair value (Note 5)	`EnergyMarketingContractLiabilitiesCurrent`	-	USD	Point-in-time
Purchase power contract derivative at fair value (Note 5)	`EnergyMarketingContractLiabilitiesCurrent`	$2.36M	USD	Point-in-time
Other	`OtherLiabilitiesCurrent`	$11.51M	USD	Point-in-time
Other	`OtherLiabilitiesCurrent`	$11.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$396.52M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$166.62M	USD	Point-in-time
Note payable to bank, noncurrent	`NotesPayableToBankNoncurrent`	$291.50M	USD	Point-in-time
Note payable to bank, noncurrent	`NotesPayableToBankNoncurrent`	$22.00M	USD	Point-in-time
Advances for construction	`AdvancesForConstruction`	$67.43M	USD	Point-in-time
Advances for construction	`AdvancesForConstruction`	$64.35M	USD	Point-in-time
Contributions in aid of construction net	`ContributionsInAidOfConstruction`	$147.92M	USD	Point-in-time
Contributions in aid of construction net	`ContributionsInAidOfConstruction`	$151.41M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$161.58M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$149.68M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$1.22M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$40.60M	USD	Point-in-time
Unamortized investment tax credits	`AccumulatedDeferredInvestmentTaxCredit`	$1.01M	USD	Point-in-time
Unamortized investment tax credits	`AccumulatedDeferredInvestmentTaxCredit`	$1.08M	USD	Point-in-time
Accrued pension and other post-retirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$33.64M	USD	Point-in-time
Accrued pension and other post-retirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$32.65M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$6.62M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$8.09M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$14.40M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$14.41M	USD	Point-in-time
Total other credits	`LiabilitiesNoncurrent`	$481.76M	USD	Point-in-time
Total other credits	`LiabilitiesNoncurrent`	$727.84M	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Total liabilities and capitalization	`LiabilitiesAndStockholdersEquity`	$2.03B	USD	Point-in-time
Total liabilities and capitalization	`LiabilitiesAndStockholdersEquity`	$2.25B	USD	Point-in-time

Income Statement 90 line items

Line Item	Tag	Value	Unit	Period
Water	`RegulatedOperatingRevenueWater`	$340.60M	USD	Annual
Water	`RegulatedOperatingRevenueWater`	$347.11M	USD	Annual
Water	`RegulatedOperatingRevenueWater`	$433.47M	USD	Annual
Electric	`RegulatedOperatingRevenueElectricNonNuclear`	$38.34M	USD	Annual
Electric	`RegulatedOperatingRevenueElectricNonNuclear`	$39.99M	USD	Annual
Electric	`RegulatedOperatingRevenueElectricNonNuclear`	$41.83M	USD	Annual
Contracted services	`RevenueFromContractWithCustomerIncludingAssessedTax`	$120.39M	USD	Annual
Contracted services	`RevenueFromContractWithCustomerIncludingAssessedTax`	$110.94M	USD	Annual
Contracted services	`RevenueFromContractWithCustomerIncludingAssessedTax`	$113.40M	USD	Annual
Total operating revenues	`Revenues`	$498.85M	USD	Annual
Total operating revenues	`Revenues`	$595.70M	USD	Annual
Total operating revenues	`Revenues`	$491.53M	USD	Annual
Water purchased	`UtilitiesOperatingExpenseWaterPurchased`	$72.86M	USD	Annual
Water purchased	`UtilitiesOperatingExpenseWaterPurchased`	$75.94M	USD	Annual
Water purchased	`UtilitiesOperatingExpenseWaterPurchased`	$77.91M	USD	Annual
Power purchased for pumping	`PowerPurchasedForPumping`	$11.86M	USD	Annual
Power purchased for pumping	`PowerPurchasedForPumping`	$11.10M	USD	Annual
Power purchased for pumping	`PowerPurchasedForPumping`	$12.83M	USD	Annual
Groundwater production assessment	`GroundwaterProductionAssessment`	$19.07M	USD	Annual
Groundwater production assessment	`GroundwaterProductionAssessment`	$20.85M	USD	Annual
Groundwater production assessment	`GroundwaterProductionAssessment`	$19.41M	USD	Annual
Power purchased for resale	`UtilitiesOperatingExpensePurchasedPower`	$15.04M	USD	Annual
Power purchased for resale	`UtilitiesOperatingExpensePurchasedPower`	$11.24M	USD	Annual
Power purchased for resale	`UtilitiesOperatingExpensePurchasedPower`	$13.28M	USD	Annual
Supply cost balancing accounts	`SupplyCostBalancingAccounts`	$-11.42M	USD	Annual
Supply cost balancing accounts	`SupplyCostBalancingAccounts`	$12.12M	USD	Annual
Supply cost balancing accounts	`SupplyCostBalancingAccounts`	$-12.00M	USD	Annual
Other operation	`OtherCostAndExpenseOperating`	$38.09M	USD	Annual
Other operation	`OtherCostAndExpenseOperating`	$34.74M	USD	Annual
Other operation	`OtherCostAndExpenseOperating`	$40.27M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$86.19M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$88.27M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$83.55M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$39.60M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$42.40M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$41.31M	USD	Annual
Maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$12.78M	USD	Annual
Maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$14.22M	USD	Annual
Maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$13.39M	USD	Annual
Property and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$22.89M	USD	Annual
Property and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$24.05M	USD	Annual
Property and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$22.52M	USD	Annual
ASUS construction	`CostOfGoodsAndServicesSold`	$56.91M	USD	Annual
ASUS construction	`CostOfGoodsAndServicesSold`	$57.91M	USD	Annual
ASUS construction	`CostOfGoodsAndServicesSold`	$53.17M	USD	Annual
Gain on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$465.00K	USD	Annual
Gain on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$100.00K	USD	Annual
Gain on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$75.00K	USD	Annual
Total operating expenses	`UtilitiesOperatingExpense`	$357.88M	USD	Annual
Total operating expenses	`UtilitiesOperatingExpense`	$398.96M	USD	Annual
Total operating expenses	`UtilitiesOperatingExpense`	$364.89M	USD	Annual
Operating Income	`OperatingIncomeLoss`	$126.64M	USD	Annual
Operating Income	`OperatingIncomeLoss`	$196.74M	USD	Annual
Operating Income	`OperatingIncomeLoss`	$140.98M	USD	Annual
Interest expense	`InterestExpense`	$22.83M	USD	Annual
Interest expense	`InterestExpense`	$42.76M	USD	Annual
Interest expense	`InterestExpense`	$27.03M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.49M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$7.42M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$2.33M	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$5.13M	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$125.00K	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$5.13M	USD	Annual
Total other income and expenses	`NonoperatingIncomeExpense`	$-30.22M	USD	Annual
Total other income and expenses	`NonoperatingIncomeExpense`	$-16.21M	USD	Annual
Total other income and expenses	`NonoperatingIncomeExpense`	$-24.58M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$102.06M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$124.77M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$166.52M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$41.60M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$23.66M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$30.42M	USD	Annual
Net Income	`NetIncomeLoss`	$78.40M	USD	Annual
Net Income	`NetIncomeLoss`	$94.35M	USD	Annual
Net Income	`NetIncomeLoss`	$124.92M	USD	Annual
Weighted Average Number of Shares Outstanding (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	36.92M	shares	Annual
Weighted Average Number of Shares Outstanding (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	36.98M	shares	Annual
Weighted Average Number of Shares Outstanding (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	36.95M	shares	Annual
Basic earnings per Common Share (usd per share)	`EarningsPerShareBasic`	$3.37	USD	Annual
Basic earnings per Common Share (usd per share)	`EarningsPerShareBasic`	$2.55	USD	Annual
Basic earnings per Common Share (usd per share)	`EarningsPerShareBasic`	$2.12	USD	Annual
Weighted Average Number of Diluted Shares (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	37.04M	shares	Annual
Weighted Average Number of Diluted Shares (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	37.01M	shares	Annual
Weighted Average Number of Diluted Shares (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	37.08M	shares	Annual
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$2.55	USD	Annual
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$2.11	USD	Annual
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$3.36	USD	Annual
Dividends Paid Per Common Share (in USD per share)	`CommonStockDividendsPerShareDeclared`	$1.52	USD	Annual
Dividends Paid Per Common Share (in USD per share)	`CommonStockDividendsPerShareDeclared`	$1.40	USD	Annual
Dividends Paid Per Common Share (in USD per share)	`CommonStockDividendsPerShareDeclared`	$1.66	USD	Annual

Cash Flow Statement 107 line items

Line Item	Tag	Value	Unit	Period
Net Income	`NetIncomeLoss`	$78.40M	USD	Annual
Net Income	`NetIncomeLoss`	$94.35M	USD	Annual
Net Income	`NetIncomeLoss`	$124.92M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$39.97M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$43.25M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$41.70M	USD	Annual
Provision for doubtful accounts	`ProvisionForDoubtfulAccounts`	$1.12M	USD	Annual
Provision for doubtful accounts	`ProvisionForDoubtfulAccounts`	$932.00K	USD	Annual
Provision for doubtful accounts	`ProvisionForDoubtfulAccounts`	$1.04M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$4.78M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$3.56M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$2.80M	USD	Annual
Stock-based compensation expense	`ShareBasedCompensation`	$2.57M	USD	Annual
Stock-based compensation expense	`ShareBasedCompensation`	$3.30M	USD	Annual
Stock-based compensation expense	`ShareBasedCompensation`	$2.57M	USD	Annual
(Gain) loss on investments held in a trust	`UnrealizedGainLossOnInvestments`	$4.29M	USD	Annual
(Gain) loss on investments held in a trust	`UnrealizedGainLossOnInvestments`	$-5.18M	USD	Annual
(Gain) loss on investments held in a trust	`UnrealizedGainLossOnInvestments`	$5.01M	USD	Annual
Other net	`OtherNoncashIncomeExpense`	$381.00K	USD	Annual
Other net	`OtherNoncashIncomeExpense`	$-289.00K	USD	Annual
Other net	`OtherNoncashIncomeExpense`	$-38.00K	USD	Annual
Accounts receivable customers	`IncreaseDecreaseInAccountsReceivable`	$4.69M	USD	Annual
Accounts receivable customers	`IncreaseDecreaseInAccountsReceivable`	$6.63M	USD	Annual
Accounts receivable customers	`IncreaseDecreaseInAccountsReceivable`	$-5.42M	USD	Annual
Unbilled receivable	`IncreaseDecreaseInUnbilledContractsReceivables`	$1.04M	USD	Annual
Unbilled receivable	`IncreaseDecreaseInUnbilledContractsReceivables`	$1.28M	USD	Annual
Unbilled receivable	`IncreaseDecreaseInUnbilledContractsReceivables`	$-9.70M	USD	Annual
Other accounts receivable	`IncreaseDecreaseInAccountsAndOtherReceivables`	$1.42M	USD	Annual
Other accounts receivable	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-2.12M	USD	Annual
Other accounts receivable	`IncreaseDecreaseInAccountsAndOtherReceivables`	$2.24M	USD	Annual
Unbilled receivable	`IncreaseDecreaseReceivableFromGovernment`	$4.71M	USD	Annual
Unbilled receivable	`IncreaseDecreaseReceivableFromGovernment`	$6.03M	USD	Annual
Unbilled receivable	`IncreaseDecreaseReceivableFromGovernment`	$5.64M	USD	Annual
Materials and supplies	`IncreaseDecreaseInMaterialsAndSupplies`	$2.46M	USD	Annual
Materials and supplies	`IncreaseDecreaseInMaterialsAndSupplies`	$3.54M	USD	Annual
Materials and supplies	`IncreaseDecreaseInMaterialsAndSupplies`	$2.95M	USD	Annual
Prepayments and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-3.15M	USD	Annual
Prepayments and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-1.58M	USD	Annual
Prepayments and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-1.32M	USD	Annual
Contract assets	`IncreaseDecreaseinContractAssets`	$-604.00K	USD	Annual
Contract assets	`IncreaseDecreaseinContractAssets`	$5.39M	USD	Annual
Contract assets	`IncreaseDecreaseinContractAssets`	$-235.00K	USD	Annual
Regulatory assets/liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$81.37M	USD	Annual
Regulatory assets/liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$5.84M	USD	Annual
Regulatory assets/liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$18.91M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-10.86M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$11.77M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-2.88M	USD	Annual
Income taxes receivable/payable	`IncreaseDecreaseInIncomeTaxes`	$2.49M	USD	Annual
Income taxes receivable/payable	`IncreaseDecreaseInIncomeTaxes`	$-6.48M	USD	Annual
Income taxes receivable/payable	`IncreaseDecreaseInIncomeTaxes`	$-2.25M	USD	Annual
Contract liabilities	`IncreaseDecreaseInContractWithCustomerLiability`	$646.00K	USD	Annual
Contract liabilities	`IncreaseDecreaseInContractWithCustomerLiability`	$-1.54M	USD	Annual
Contract liabilities	`IncreaseDecreaseInContractWithCustomerLiability`	$449.00K	USD	Annual
Accrued pension and other post-retirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-3.09M	USD	Annual
Accrued pension and other post-retirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$3.05M	USD	Annual
Accrued pension and other post-retirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$1.05M	USD	Annual
Other liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-4.75M	USD	Annual
Other liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$2.00M	USD	Annual
Other liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$416.00K	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInOperatingActivities`	$67.68M	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInOperatingActivities`	$117.80M	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInOperatingActivities`	$115.58M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$188.54M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$144.51M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$166.24M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$577.00K	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$224.00K	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$862.00K	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInInvestingActivities`	$-145.09M	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInInvestingActivities`	$-167.10M	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInInvestingActivities`	$-188.76M	USD	Annual
Receipt of advances for and contributions in aid of construction	`ProceedsFromContributionInAidOfConstructionAndRepaymentsOfAdvancesForConstruction`	$11.89M	USD	Annual
Receipt of advances for and contributions in aid of construction	`ProceedsFromContributionInAidOfConstructionAndRepaymentsOfAdvancesForConstruction`	$6.90M	USD	Annual
Receipt of advances for and contributions in aid of construction	`ProceedsFromContributionInAidOfConstructionAndRepaymentsOfAdvancesForConstruction`	$12.43M	USD	Annual
Refunds on advances for construction	`RefundsOnAdvancesForConstruction`	$5.32M	USD	Annual
Refunds on advances for construction	`RefundsOnAdvancesForConstruction`	$4.67M	USD	Annual
Refunds on advances for construction	`RefundsOnAdvancesForConstruction`	$4.54M	USD	Annual
Repayments of long-term debt	`RepaymentsOfLongTermDebt`	$377.00K	USD	Annual
Repayments of long-term debt	`RepaymentsOfLongTermDebt`	$334.00K	USD	Annual
Repayments of long-term debt	`RepaymentsOfLongTermDebt`	$28.36M	USD	Annual
Proceeds from the issuance of long-term debt, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	$129.66M	USD	Annual
Proceeds from the issuance of long-term debt, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	Annual
Proceeds from the issuance of long-term debt, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	$34.79M	USD	Annual
Net changes in notes payable to banks	`ProceedsFromRepaymentsOfNotesPayable`	$72.00M	USD	Annual
Net changes in notes payable to banks	`ProceedsFromRepaymentsOfNotesPayable`	$54.59M	USD	Annual
Net changes in notes payable to banks	`ProceedsFromRepaymentsOfNotesPayable`	$71.30M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$56.36M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$61.20M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$51.69M	USD	Annual
Other	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$1.29M	USD	Annual
Other	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$1.30M	USD	Annual
Other	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$918.00K	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInFinancingActivities`	$129.16M	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInFinancingActivities`	$50.34M	USD	Annual
Net cash provided (used)	`NetCashProvidedByUsedInFinancingActivities`	$-2.27M	USD	Annual
Net change in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-31.77M	USD	Annual
Net change in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$8.08M	USD	Annual
Net change in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$1.03M	USD	Annual
Cash and cash equivalents, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$4.96M	USD	Point-in-time
Cash and cash equivalents, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$6.00M	USD	Point-in-time
Cash and cash equivalents, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$36.74M	USD	Point-in-time
Cash and cash equivalents, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$14.07M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$4.96M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$6.00M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$36.74M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$14.07M	USD	Point-in-time

Stockholders Equity 33 line items

Line Item	Tag	Value	Unit	Period
Beginning Balance (in shares)	`CommonStockSharesOutstanding`	36.96M	shares	Point-in-time
Beginning Balance (in shares)	`CommonStockSharesOutstanding`	36.98M	shares	Point-in-time
Beginning Balance	`StockholdersEquity`	$685.95M	USD	Point-in-time
Beginning Balance	`StockholdersEquity`	$709.55M	USD	Point-in-time
Beginning Balance	`StockholdersEquity`	$776.11M	USD	Point-in-time
Beginning Balance	`StockholdersEquity`	$641.67M	USD	Point-in-time
Net Income	`NetIncomeLoss`	$78.40M	USD	Annual
Net Income	`NetIncomeLoss`	$94.35M	USD	Annual
Net Income	`NetIncomeLoss`	$124.92M	USD	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodSharesNewIssues`	47,182.00	shares	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodSharesNewIssues`	18,371.00	shares	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodSharesNewIssues`	25,956.00	shares	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodValueStockOptionsExercised`	-	USD	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodValueStockOptionsExercised`	-	USD	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodValueStockOptionsExercised`	-	USD	Annual
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$1.56M	USD	Annual
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$2.83M	USD	Annual
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$1.62M	USD	Annual
Dividend equivalent rights on stock-based awards not paid in cash	`DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax`	$187.00K	USD	Annual
Dividend equivalent rights on stock-based awards not paid in cash	`DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax`	$154.00K	USD	Annual
Dividend equivalent rights on stock-based awards not paid in cash	`DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax`	$160.00K	USD	Annual
Dividends on Common Shares	`DividendsCommonStock`	$56.36M	USD	Annual
Dividends on Common Shares	`DividendsCommonStock`	$51.69M	USD	Annual
Dividends on Common Shares	`DividendsCommonStock`	$61.20M	USD	Annual
Dividend equivalent rights on stock-based awards	`DividendsEquivalentRightsOnShareBasedCompensationNetOfTax`	$154.00K	USD	Annual
Dividend equivalent rights on stock-based awards	`DividendsEquivalentRightsOnShareBasedCompensationNetOfTax`	$187.00K	USD	Annual
Dividend equivalent rights on stock-based awards	`DividendsEquivalentRightsOnShareBasedCompensationNetOfTax`	$160.00K	USD	Annual
Ending Balance (in shares)	`CommonStockSharesOutstanding`	36.96M	shares	Point-in-time
Ending Balance (in shares)	`CommonStockSharesOutstanding`	36.98M	shares	Point-in-time
Ending Balance	`StockholdersEquity`	$685.95M	USD	Point-in-time
Ending Balance	`StockholdersEquity`	$709.55M	USD	Point-in-time
Ending Balance	`StockholdersEquity`	$776.11M	USD	Point-in-time
Ending Balance	`StockholdersEquity`	$641.67M	USD	Point-in-time

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