10-K Filing

AMERICAN STATES WATER CO CIK: 1056903 FY 2020

Filing Information

Form Type	10-K
Accession Number	`0001056903-21-000021`
Period End Date	20201231
Filing Date	20210222
Fiscal Year	2020
Fiscal Period	FY
XBRL Instance	awr-20201231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 121 Income Statement 130 Cash Flow Statement 124 Stockholders Equity 36

Balance Sheet 121 line items

Line Item	Tag	Value	Unit	Period
Water	`UtilitiesWaterPropertyPlantAndEquipmentGross`	$1.70B	USD	Point-in-time
Water	`UtilitiesWaterPropertyPlantAndEquipmentGross`	$1.78B	USD	Point-in-time
Electric	`UtilitiesElectricPropertyPlantAndEquipmentGross`	$108.42M	USD	Point-in-time
Electric	`UtilitiesElectricPropertyPlantAndEquipmentGross`	$112.51M	USD	Point-in-time
Total	`UtilitiesPropertyPlantAndEquipmentGross`	$1.81B	USD	Point-in-time
Total	`UtilitiesPropertyPlantAndEquipmentGross`	$1.90B	USD	Point-in-time
Non-regulated utility property, at cost	`NonUtilitiesPropertyPlantAndEquipmentGross`	$30.55M	USD	Point-in-time
Non-regulated utility property, at cost	`NonUtilitiesPropertyPlantAndEquipmentGross`	$33.31M	USD	Point-in-time
Total utility plant, at cost	`PropertyPlantAndEquipmentGross`	$1.93B	USD	Point-in-time
Total utility plant, at cost	`PropertyPlantAndEquipmentGross`	$1.84B	USD	Point-in-time
Less accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$543.26M	USD	Point-in-time
Less accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$568.33M	USD	Point-in-time
Utility plant before construction work in progress	`PropertyPlantAndEquipmentBeforeConstructionWorkInProgress`	$1.30B	USD	Point-in-time
Utility plant before construction work in progress	`PropertyPlantAndEquipmentBeforeConstructionWorkInProgress`	$1.36B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$119.55M	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$150.15M	USD	Point-in-time
Net utility plant	`PropertyPlantAndEquipmentNet`	$1.51B	USD	Point-in-time
Net utility plant	`PropertyPlantAndEquipmentNet`	$1.30B	USD	Point-in-time
Net utility plant	`PropertyPlantAndEquipmentNet`	$1.42B	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`	$35.32M	USD	Point-in-time
Other property and investments	`PropertyPlantAndEquipmentAndInvestmentsOtherNet`	$30.29M	USD	Point-in-time
Total other property and investments	`PropertyPlantAndEquipmentAndInvestmentsOtherAndGoodwillNet`	$36.43M	USD	Point-in-time
Total other property and investments	`PropertyPlantAndEquipmentAndInvestmentsOtherAndGoodwillNet`	$31.41M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$7.14M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$214.00K	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$36.74M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$1.33M	USD	Point-in-time
Accounts receivable customers, less allowance for doubtful accounts	`AccountsReceivableNetCurrent`	$20.91M	USD	Point-in-time
Accounts receivable customers, less allowance for doubtful accounts	`AccountsReceivableNetCurrent`	$29.16M	USD	Point-in-time
Unbilled revenue receivable (Note 2)	`UnbilledReceivablesCurrent`	$25.84M	USD	Point-in-time
Unbilled revenue receivable (Note 2)	`UnbilledReceivablesCurrent`	$20.48M	USD	Point-in-time
Receivable from U.S. government, less allowance for doubtful accounts (Note 2)	`AccountsReceivableFromUSGovernmentNetCurrent`	$25.18M	USD	Point-in-time
Receivable from U.S. government, less allowance for doubtful accounts (Note 2)	`AccountsReceivableFromUSGovernmentNetCurrent`	$22.61M	USD	Point-in-time
Other accounts receivable, less allowance for doubtful accounts	`AccountsAndOtherReceivablesNetCurrent`	$3.10M	USD	Point-in-time
Other accounts receivable, less allowance for doubtful accounts	`AccountsAndOtherReceivablesNetCurrent`	$3.96M	USD	Point-in-time
Income taxes receivable	`IncomeTaxesReceivable`	$5.68M	USD	Point-in-time
Income taxes receivable	`IncomeTaxesReceivable`	$103.00K	USD	Point-in-time
Materials and supplies	`InventoryRawMaterialsAndSupplies`	$8.62M	USD	Point-in-time
Materials and supplies	`InventoryRawMaterialsAndSupplies`	$6.43M	USD	Point-in-time
Regulatory assets current	`RegulatoryAssetsCurrent`	$20.93M	USD	Point-in-time
Regulatory assets current	`RegulatoryAssetsCurrent`	$13.09M	USD	Point-in-time
Prepayments and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$5.55M	USD	Point-in-time
Prepayments and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$5.41M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossCurrent`	$8.87M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossCurrent`	$15.57M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$122.46M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$157.12M	USD	Point-in-time
Unbilled revenue, receivable from U.S government	`UnbilledReceivablesNotBillableAtBalanceSheetDate`	$9.95M	USD	Point-in-time
Unbilled revenue, receivable from U.S government	`UnbilledReceivablesNotBillableAtBalanceSheetDate`	$8.62M	USD	Point-in-time
Receivable from U.S. government (Note 2)	`AccountReceivablefromUSGovernmentNetNoncurrent`	$42.21M	USD	Point-in-time
Receivable from U.S. government (Note 2)	`AccountReceivablefromUSGovernmentNetNoncurrent`	$49.49M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossNoncurrent`	$1.38M	USD	Point-in-time
Contract assets (Note 2)	`ContractWithCustomerAssetGrossNoncurrent`	$64.00K	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$11.15M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$13.17M	USD	Point-in-time
Regulatory Assets, Noncurrent	`RegulatoryAssetsNoncurrent`	$3.45M	USD	Point-in-time
Regulatory Assets, Noncurrent	`RegulatoryAssetsNoncurrent`	-	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$10.60M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$7.70M	USD	Point-in-time
Total other assets	`RegulatoryAndOtherAssets`	$86.01M	USD	Point-in-time
Total other assets	`RegulatoryAndOtherAssets`	$71.76M	USD	Point-in-time
Total Assets	`Assets`	$1.79B	USD	Point-in-time
Total Assets	`Assets`	$1.64B	USD	Point-in-time
Common shareholders' equity	`StockholdersEquity`	$529.95M	USD	Point-in-time
Common shareholders' equity	`StockholdersEquity`	$558.22M	USD	Point-in-time
Common shareholders' equity	`StockholdersEquity`	$601.53M	USD	Point-in-time
Common shareholders' equity	`StockholdersEquity`	$641.67M	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$281.00M	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$440.35M	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$882.53M	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$1.08B	USD	Point-in-time
Notes payable to banks	`NotesPayableToBankCurrent`	-	USD	Point-in-time
Notes payable to banks	`NotesPayableToBankCurrent`	$5.00M	USD	Point-in-time
Long-term debt -current	`OtherNotesPayableCurrent`	$358.00K	USD	Point-in-time
Long-term debt -current	`OtherNotesPayableCurrent`	$344.00K	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$55.62M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$63.79M	USD	Point-in-time
Income taxes payable	`TaxesPayableCurrent`	$6.78M	USD	Point-in-time
Income taxes payable	`TaxesPayableCurrent`	$95.00K	USD	Point-in-time
Accrued other taxes	`FranchiseAndAssessmentFeesTaxes`	$11.11M	USD	Point-in-time
Accrued other taxes	`FranchiseAndAssessmentFeesTaxes`	$11.90M	USD	Point-in-time
Accrued employee expenses	`EmployeeRelatedLiabilitiesCurrent`	$14.26M	USD	Point-in-time
Accrued employee expenses	`EmployeeRelatedLiabilitiesCurrent`	$15.12M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$4.83M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$3.05M	USD	Point-in-time
Unrealized loss on purchased power contracts	`Unrealizedlossonpurchasedpowercontracts`	$1.54M	USD	Point-in-time
Unrealized loss on purchased power contracts	`Unrealizedlossonpurchasedpowercontracts`	$3.17M	USD	Point-in-time
Contract liabilities (Note 2)	`ContractWithCustomerLiabilityCurrent`	$1.80M	USD	Point-in-time
Contract liabilities (Note 2)	`ContractWithCustomerLiabilityCurrent`	$11.17M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityCurrent`	$1.85M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityCurrent`	$2.01M	USD	Point-in-time
Other	`OtherLiabilitiesCurrent`	$10.34M	USD	Point-in-time
Other	`OtherLiabilitiesCurrent`	$10.44M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$116.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$118.57M	USD	Point-in-time
Notes payable to banks	`NotesPayableToBankNoncurrent`	$200.00M	USD	Point-in-time
Notes payable to banks	`NotesPayableToBankNoncurrent`	$134.20M	USD	Point-in-time
Advances for Construction	`AdvancesForConstruction`	$63.37M	USD	Point-in-time
Advances for Construction	`AdvancesForConstruction`	$63.99M	USD	Point-in-time
Contributions in aid of construction net	`ContributionsInAidOfConstruction`	$140.33M	USD	Point-in-time
Contributions in aid of construction net	`ContributionsInAidOfConstruction`	$134.71M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$125.30M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$131.17M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$23.38M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	-	USD	Point-in-time
Unamortized investment tax credits	`AccumulatedDeferredInvestmentTaxCredit`	$1.29M	USD	Point-in-time
Unamortized investment tax credits	`AccumulatedDeferredInvestmentTaxCredit`	$1.22M	USD	Point-in-time
Accrued pension and other post-retirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$68.47M	USD	Point-in-time
Accrued pension and other post-retirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$95.64M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$9.64M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$11.74M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$15.43M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$13.93M	USD	Point-in-time
Total other credits	`LiabilitiesNoncurrent`	$591.01M	USD	Point-in-time
Total other credits	`LiabilitiesNoncurrent`	$642.81M	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Liabilities and Equity, Total	`LiabilitiesAndStockholdersEquity`	$1.64B	USD	Point-in-time
Liabilities and Equity, Total	`LiabilitiesAndStockholdersEquity`	$1.79B	USD	Point-in-time

Income Statement 130 line items

Line Item	Tag	Value	Unit	Period
Water	`RegulatedOperatingRevenueWater`	$319.83M	USD	Annual
Water	`RegulatedOperatingRevenueWater`	$330.64M	USD	Annual
Water	`RegulatedOperatingRevenueWater`	$295.26M	USD	Annual
Electric	`RegulatedOperatingRevenueElectricNonNuclear`	$39.55M	USD	Annual
Electric	`RegulatedOperatingRevenueElectricNonNuclear`	$37.02M	USD	Annual
Electric	`RegulatedOperatingRevenueElectricNonNuclear`	$34.35M	USD	Annual
Contracted services	`RevenueFromContractWithCustomerIncludingAssessedTax`	$120.58M	USD	Annual
Contracted services	`RevenueFromContractWithCustomerIncludingAssessedTax`	$114.49M	USD	Annual
Contracted services	`RevenueFromContractWithCustomerIncludingAssessedTax`	$107.21M	USD	Annual
Total operating revenues	`Revenues`	$133.69M	USD	1 Quarter
Total operating revenues	`Revenues`	$473.87M	USD	Annual
Total operating revenues	`Revenues`	$124.65M	USD	1 Quarter
Total operating revenues	`Revenues`	$436.82M	USD	Annual
Total operating revenues	`Revenues`	$134.50M	USD	1 Quarter
Total operating revenues	`Revenues`	$124.20M	USD	1 Quarter
Total operating revenues	`Revenues`	$101.73M	USD	1 Quarter
Total operating revenues	`Revenues`	$112.99M	USD	1 Quarter
Total operating revenues	`Revenues`	$488.24M	USD	Annual
Total operating revenues	`Revenues`	$121.28M	USD	1 Quarter
Total operating revenues	`Revenues`	$109.08M	USD	1 Quarter
Water purchased	`UtilitiesOperatingExpenseWaterPurchased`	$72.29M	USD	Annual
Water purchased	`UtilitiesOperatingExpenseWaterPurchased`	$68.90M	USD	Annual
Water purchased	`UtilitiesOperatingExpenseWaterPurchased`	$74.55M	USD	Annual
Power purchased for pumping	`PowerPurchasedForPumping`	$8.66M	USD	Annual
Power purchased for pumping	`PowerPurchasedForPumping`	$10.13M	USD	Annual
Power purchased for pumping	`PowerPurchasedForPumping`	$8.97M	USD	Annual
Groundwater production assessment	`GroundwaterProductionAssessment`	$20.39M	USD	Annual
Groundwater production assessment	`GroundwaterProductionAssessment`	$18.96M	USD	Annual
Groundwater production assessment	`GroundwaterProductionAssessment`	$19.44M	USD	Annual
Power purchased for resale	`UtilitiesOperatingExpensePurchasedPower`	$11.59M	USD	Annual
Power purchased for resale	`UtilitiesOperatingExpensePurchasedPower`	$10.42M	USD	Annual
Power purchased for resale	`UtilitiesOperatingExpensePurchasedPower`	$11.80M	USD	Annual
Supply cost balancing accounts	`SupplyCostBalancingAccounts`	$-15.65M	USD	Annual
Supply cost balancing accounts	`SupplyCostBalancingAccounts`	$-7.03M	USD	Annual
Supply cost balancing accounts	`SupplyCostBalancingAccounts`	$-11.80M	USD	Annual
Other operation	`OtherCostAndExpenseOperating`	$32.76M	USD	Annual
Other operation	`OtherCostAndExpenseOperating`	$33.24M	USD	Annual
Other operation	`OtherCostAndExpenseOperating`	$31.65M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$83.03M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$82.59M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$83.61M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$35.40M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$40.42M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$36.85M	USD	Annual
Maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$15.70M	USD	Annual
Maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$15.68M	USD	Annual
Maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$15.47M	USD	Annual
Property and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$18.40M	USD	Annual
Property and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$20.04M	USD	Annual
Property and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$22.20M	USD	Annual
ASUS construction	`CostOfGoodsAndServicesSold`	$62.41M	USD	Annual
ASUS construction	`CostOfGoodsAndServicesSold`	$55.67M	USD	Annual
ASUS construction	`CostOfGoodsAndServicesSold`	$53.91M	USD	Annual
(Gain) loss on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$253.00K	USD	Annual
(Gain) loss on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$85.00K	USD	Annual
(Gain) loss on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-31.00K	USD	Annual
Total operating expenses	`UtilitiesOperatingExpense`	$357.74M	USD	Annual
Total operating expenses	`UtilitiesOperatingExpense`	$346.80M	USD	Annual
Total operating expenses	`UtilitiesOperatingExpense`	$335.83M	USD	Annual
Operating Income	`OperatingIncomeLoss`	$42.72M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$25.70M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$29.28M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$39.81M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$127.07M	USD	Annual
Operating Income	`OperatingIncomeLoss`	$39.43M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$35.72M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$130.50M	USD	Annual
Operating Income	`OperatingIncomeLoss`	$100.98M	USD	Annual
Operating Income	`OperatingIncomeLoss`	$20.20M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$24.72M	USD	1 Quarter
Interest expense	`InterestExpense`	$23.43M	USD	Annual
Interest expense	`InterestExpense`	$24.59M	USD	Annual
Interest expense	`InterestExpense`	$22.53M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$3.25M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$3.58M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.80M	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$760.00K	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$3.28M	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$4.85M	USD	Annual
Total other income and expenses	`NonoperatingIncomeExpense`	$-19.09M	USD	Annual
Total other income and expenses	`NonoperatingIncomeExpense`	$-18.06M	USD	Annual
Total other income and expenses	`NonoperatingIncomeExpense`	$-15.88M	USD	Annual
Income before income tax expense	`IncomeLossAttributableToParent`	$114.62M	USD	Annual
Income before income tax expense	`IncomeLossAttributableToParent`	$81.89M	USD	Annual
Income before income tax expense	`IncomeLossAttributableToParent`	$109.01M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$18.02M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$24.67M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$28.20M	USD	Annual
Net Income	`NetIncomeLoss`	$26.78M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$84.34M	USD	Annual
Net Income	`NetIncomeLoss`	$12.85M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$20.21M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$25.61M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$14.07M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$63.87M	USD	Annual
Net Income	`NetIncomeLoss`	$86.42M	USD	Annual
Net Income	`NetIncomeLoss`	$16.70M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$26.53M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$28.01M	USD	1 Quarter
Weighted Average Number of Shares Outstanding (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	36.73M	shares	Annual
Weighted Average Number of Shares Outstanding (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	36.88M	shares	Annual
Weighted Average Number of Shares Outstanding (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	36.81M	shares	Annual
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.35	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.55	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.38	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.76	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.72	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$2.28	USD	Annual
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.69	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.45	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.72	USD	1 Quarter
Earnings Per Share, Basic	`EarningsPerShareBasic`	$1.73	USD	Annual
Earnings Per Share, Basic	`EarningsPerShareBasic`	$2.34	USD	Annual
Weighted Average Number of Diluted Shares (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	36.94M	shares	Annual
Weighted Average Number of Diluted Shares (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	36.96M	shares	Annual
Weighted Average Number of Diluted Shares (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	36.99M	shares	Annual
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$1.72	USD	Annual
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$2.33	USD	Annual
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.35	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.76	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.72	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.69	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.38	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.54	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.45	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.72	USD	1 Quarter
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$2.28	USD	Annual
Dividends Paid Per Common Share	`CommonStockDividendsPerShareDeclared`	$1.28	USD	Annual
Dividends Paid Per Common Share	`CommonStockDividendsPerShareDeclared`	$1.16	USD	Annual
Dividends Paid Per Common Share	`CommonStockDividendsPerShareDeclared`	$1.06	USD	Annual

Cash Flow Statement 124 line items

Line Item	Tag	Value	Unit	Period
Net Income	`NetIncomeLoss`	$26.78M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$84.34M	USD	Annual
Net Income	`NetIncomeLoss`	$12.85M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$20.21M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$25.61M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$14.07M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$63.87M	USD	Annual
Net Income	`NetIncomeLoss`	$86.42M	USD	Annual
Net Income	`NetIncomeLoss`	$16.70M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$26.53M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$28.01M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$40.66M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$35.71M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$37.20M	USD	Annual
Provision for doubtful accounts	`ProvisionForDoubtfulAccounts`	$841.00K	USD	Annual
Provision for doubtful accounts	`ProvisionForDoubtfulAccounts`	$608.00K	USD	Annual
Provision for doubtful accounts	`ProvisionForDoubtfulAccounts`	$1.43M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$2.24M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$-5.77M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$6.62M	USD	Annual
Stock-based compensation expense	`ShareBasedCompensation`	$2.46M	USD	Annual
Stock-based compensation expense	`ShareBasedCompensation`	$3.85M	USD	Annual
Stock-based compensation expense	`ShareBasedCompensation`	$2.52M	USD	Annual
(Gain) loss on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$253.00K	USD	Annual
(Gain) loss on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$85.00K	USD	Annual
(Gain) loss on sale of assets	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-31.00K	USD	Annual
(Gain) loss on investments held in a trust	`UnrealizedGainLossOnInvestments`	$-558.00K	USD	Annual
(Gain) loss on investments held in a trust	`UnrealizedGainLossOnInvestments`	$3.58M	USD	Annual
(Gain) loss on investments held in a trust	`UnrealizedGainLossOnInvestments`	$3.02M	USD	Annual
Other - net	`OtherNoncashIncomeExpense`	$-526.00K	USD	Annual
Other - net	`OtherNoncashIncomeExpense`	$-97.00K	USD	Annual
Other - net	`OtherNoncashIncomeExpense`	$908.00K	USD	Annual
Accounts receivable - customers	`IncreaseDecreaseInAccountsReceivable`	$13.27M	USD	Annual
Accounts receivable - customers	`IncreaseDecreaseInAccountsReceivable`	$-1.88M	USD	Annual
Accounts receivable - customers	`IncreaseDecreaseInAccountsReceivable`	$-1.88M	USD	Annual
Unbilled revenue- receivable	`IncreaseDecreaseInUnbilledContractsReceivables`	$-2.82M	USD	Annual
Unbilled revenue- receivable	`IncreaseDecreaseInUnbilledContractsReceivables`	$6.68M	USD	Annual
Unbilled revenue- receivable	`IncreaseDecreaseInUnbilledContractsReceivables`	$5.51M	USD	Annual
Other accounts receivable	`IncreaseDecreaseInAccountsAndOtherReceivables`	$1.20M	USD	Annual
Other accounts receivable	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-5.15M	USD	Annual
Other accounts receivable	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-214.00K	USD	Annual
Receivable from the U.S. government	`IncreaseDecreaseReceivableFromGovernment`	$3.89M	USD	Annual
Receivable from the U.S. government	`IncreaseDecreaseReceivableFromGovernment`	$20.98M	USD	Annual
Receivable from the U.S. government	`IncreaseDecreaseReceivableFromGovernment`	$-1.14M	USD	Annual
Materials and supplies	`IncreaseDecreaseInMaterialsAndSupplies`	$2.19M	USD	Annual
Materials and supplies	`IncreaseDecreaseInMaterialsAndSupplies`	$654.00K	USD	Annual
Materials and supplies	`IncreaseDecreaseInMaterialsAndSupplies`	$980.00K	USD	Annual
Prepayments and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-3.98M	USD	Annual
Prepayments and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-1.69M	USD	Annual
Prepayments and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$519.00K	USD	Annual
Contract Assets	`IncreaseDecreaseinContractAssets`	$-3.98M	USD	Annual
Contract Assets	`IncreaseDecreaseinContractAssets`	$588.00K	USD	Annual
Contract Assets	`IncreaseDecreaseinContractAssets`	$-5.94M	USD	Annual
Regulatory Assets / Liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-33.83M	USD	Annual
Regulatory Assets / Liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$11.60M	USD	Annual
Regulatory Assets / Liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-10.15M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-249.00K	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$1.28M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$5.35M	USD	Annual
Income taxes receivable / payable	`IncreaseDecreaseInIncomeTaxes`	$-3.79M	USD	Annual
Income taxes receivable / payable	`IncreaseDecreaseInIncomeTaxes`	$2.71M	USD	Annual
Income taxes receivable / payable	`IncreaseDecreaseInIncomeTaxes`	$12.27M	USD	Annual
Contract liabilities	`IncreaseDecreaseInContractWithCustomerLiability`	$3.64M	USD	Annual
Contract liabilities	`IncreaseDecreaseInContractWithCustomerLiability`	$-9.37M	USD	Annual
Contract liabilities	`IncreaseDecreaseInContractWithCustomerLiability`	$3.62M	USD	Annual
Accrued pension and other post-retirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$1.44M	USD	Annual
Accrued pension and other post-retirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$1.99M	USD	Annual
Accrued pension and other post-retirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-1.09M	USD	Annual
Other liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-4.66M	USD	Annual
Other liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$2.59M	USD	Annual
Other liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-928.00K	USD	Annual
Cash Flows From Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$116.86M	USD	Annual
Cash Flows From Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$136.77M	USD	Annual
Cash Flows From Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$122.17M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$130.42M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$151.94M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$126.56M	USD	Annual
Proceeds from sale of assets	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$169.00K	USD	Annual
Proceeds from sale of assets	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$88.00K	USD	Annual
Proceeds from sale of assets	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$72.00K	USD	Annual
Other investments	`PaymentsForProceedsFromOtherInvestingActivities`	$1.55M	USD	Annual
Other investments	`PaymentsForProceedsFromOtherInvestingActivities`	$1.27M	USD	Annual
Other investments	`PaymentsForProceedsFromOtherInvestingActivities`	$1.42M	USD	Annual
Net Cash Provided by (Used in) Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-131.61M	USD	Annual
Net Cash Provided by (Used in) Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-128.04M	USD	Annual
Net Cash Provided by (Used in) Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-153.19M	USD	Annual
Proceeds from stock option exercises	`ProceedsFromIssuanceOfCommonSharesAndStockOptionExercises`	$546.00K	USD	Annual
Proceeds from stock option exercises	`ProceedsFromIssuanceOfCommonSharesAndStockOptionExercises`	$30.00K	USD	Annual
Proceeds from stock option exercises	`ProceedsFromIssuanceOfCommonSharesAndStockOptionExercises`	$519.00K	USD	Annual
Proceeds from Advances for Construction	`ProceedsFromAdvancesForConstruction`	$9.34M	USD	Annual
Proceeds from Advances for Construction	`ProceedsFromAdvancesForConstruction`	$5.55M	USD	Annual
Proceeds from Advances for Construction	`ProceedsFromAdvancesForConstruction`	$10.17M	USD	Annual
Refunds on advances for construction	`RepaymentsOfAdvancesForConstruction`	$3.89M	USD	Annual
Refunds on advances for construction	`RepaymentsOfAdvancesForConstruction`	$3.73M	USD	Annual
Refunds on advances for construction	`RepaymentsOfAdvancesForConstruction`	$5.00M	USD	Annual
Retirement or repayments of long-term debt	`RepaymentsOfLongTermDebt`	$326.00K	USD	Annual
Retirement or repayments of long-term debt	`RepaymentsOfLongTermDebt`	$336.00K	USD	Annual
Retirement or repayments of long-term debt	`RepaymentsOfLongTermDebt`	$40.33M	USD	Annual
Increase (Decrease) in Notes Payable, Current	`IncreaseDecreaseInNotesPayableCurrent`	$-70.80M	USD	Annual
Increase (Decrease) in Notes Payable, Current	`IncreaseDecreaseInNotesPayableCurrent`	$109.50M	USD	Annual
Increase (Decrease) in Notes Payable, Current	`IncreaseDecreaseInNotesPayableCurrent`	$36.50M	USD	Annual
Proceeds from issuance of long-term debt, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	$159.41M	USD	Annual
Proceeds from issuance of long-term debt, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	Annual
Proceeds from issuance of long-term debt, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	Annual
Dividends paid	`PaymentsOfDividends`	$42.70M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$38.94M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$47.21M	USD	Annual
Other	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$1.63M	USD	Annual
Other	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$1.25M	USD	Annual
Other	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$1.87M	USD	Annual
Net Cash Provided by (Used in) Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$44.84M	USD	Annual
Net Cash Provided by (Used in) Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-1.80M	USD	Annual
Net Cash Provided by (Used in) Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$30.52M	USD	Annual
Net change in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$35.40M	USD	Annual
Net change in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-5.81M	USD	Annual
Net change in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$6.93M	USD	Annual
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$7.14M	USD	Point-in-time
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$214.00K	USD	Point-in-time
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$36.74M	USD	Point-in-time
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$1.33M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$7.14M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$214.00K	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$36.74M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$1.33M	USD	Point-in-time

Stockholders Equity 36 line items

Line Item	Tag	Value	Unit	Period
Common stock, shares outstanding	`CommonStockSharesOutstanding`	36.89M	shares	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	36.85M	shares	Point-in-time
Balances	`StockholdersEquity`	$529.95M	USD	Point-in-time
Balances	`StockholdersEquity`	$558.22M	USD	Point-in-time
Balances	`StockholdersEquity`	$601.53M	USD	Point-in-time
Balances	`StockholdersEquity`	$641.67M	USD	Point-in-time
Net Income	`NetIncomeLoss`	$26.78M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$84.34M	USD	Annual
Net Income	`NetIncomeLoss`	$12.85M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$20.21M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$25.61M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$14.07M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$63.87M	USD	Annual
Net Income	`NetIncomeLoss`	$86.42M	USD	Annual
Net Income	`NetIncomeLoss`	$16.70M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$26.53M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$28.01M	USD	1 Quarter
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodValueStockOptionsExercised`	$30.00K	USD	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodValueStockOptionsExercised`	$519.00K	USD	Annual
Exercise of stock options and other issuance of Common Shares	`StockIssuedDuringPeriodValueStockOptionsExercised`	$546.00K	USD	Annual
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$1.15M	USD	Annual
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$894.00K	USD	Annual
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$2.80M	USD	Annual
Dividend equivalent rights on stock-based awards not paid in cash	`DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax`	$210.00K	USD	Annual
Dividend equivalent rights on stock-based awards not paid in cash	`DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax`	$176.00K	USD	Annual
Dividend equivalent rights on stock-based awards not paid in cash	`DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax`	$221.00K	USD	Annual
Dividends on Common Shares	`DividendsCommonStock`	$47.21M	USD	Annual
Dividends on Common Shares	`DividendsCommonStock`	$38.94M	USD	Annual
Dividends on Common Shares	`DividendsCommonStock`	$42.70M	USD	Annual
Dividend equivalent rights on stock-based awards	`DividendsEquivalentRightsOnShareBasedCompensationNetOfTax`	$210.00K	USD	Annual
Dividend equivalent rights on stock-based awards	`DividendsEquivalentRightsOnShareBasedCompensationNetOfTax`	$176.00K	USD	Annual
Dividend equivalent rights on stock-based awards	`DividendsEquivalentRightsOnShareBasedCompensationNetOfTax`	$221.00K	USD	Annual
Balances	`StockholdersEquity`	$529.95M	USD	Point-in-time
Balances	`StockholdersEquity`	$558.22M	USD	Point-in-time
Balances	`StockholdersEquity`	$601.53M	USD	Point-in-time
Balances	`StockholdersEquity`	$641.67M	USD	Point-in-time

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