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v2.4.1.9

Taxes on Income (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Taxes on income |  |  |
Unrecognized Tax Benefits | $ 0 us-gaap_UnrecognizedTaxBenefits |  |
Deferred tax assets: |  |  |
Regulatory-liability-related: ITC and excess deferred taxes | 1,001,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToITCAndExcessDeferredTaxes | 1,049,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToITCAndExcessDeferredTaxes |
Regulatory-liability-related: California Corp Franchise Tax | 4,328,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToStateFranchiseTax | 4,337,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToStateFranchiseTax |
Other nonproperty-related | 2,395,000 awr_DeferredTaxAssetsOtherNonproperty | 4,125,000 awr_DeferredTaxAssetsOtherNonproperty |
Contributions and advances | 8,335,000 awr_DeferredTaxAssetsContributionsAndAdvances | 8,655,000 awr_DeferredTaxAssetsContributionsAndAdvances |
Deferred tax assets | 16,059,000 us-gaap_DeferredTaxAssetsGross | 18,166,000 us-gaap_DeferredTaxAssetsGross |
Deferred tax liabilities: |  |  |
Fixed assets | (163,232,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | (131,534,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
Regulatory-asset-related: depreciation and other | (22,941,000)us-gaap_DeferredTaxLiabilitiesRegulatoryAssets | (21,575,000)us-gaap_DeferredTaxLiabilitiesRegulatoryAssets |
Deferred Tax Liabilities, Regulatory Assets and Liabilities Related to State Franchise Tax | (4,069,000)awr_DeferredTaxLiabilitiesRegulatoryAssetsandLiabilitiesRelatedtoStateFranchiseTax | (2,120,000)awr_DeferredTaxLiabilitiesRegulatoryAssetsandLiabilitiesRelatedtoStateFranchiseTax |
Other nonproperty-related | (59,000)awr_DeferredTaxLiabilitiesOtherNonproperty | (155,000)awr_DeferredTaxLiabilitiesOtherNonproperty |
Balancing and memorandum accounts | (4,071,000)awr_DeferredTaxLiabilitiesBalancingAndMemorandumAccounts | (6,663,000)awr_DeferredTaxLiabilitiesBalancingAndMemorandumAccounts |
Deferred charges | (5,461,000)us-gaap_DeferredTaxLiabilitiesDeferredExpense | (6,064,000)us-gaap_DeferredTaxLiabilitiesDeferredExpense |
Deferred tax liabilities | (199,833,000)us-gaap_DeferredIncomeTaxLiabilities | (168,111,000)us-gaap_DeferredIncomeTaxLiabilities |
Accumulated deferred income taxes - net | (183,774,000)us-gaap_DeferredTaxLiabilities | (149,945,000)us-gaap_DeferredTaxLiabilities |
Current |  |  |
Federal | 5,595,000 us-gaap_CurrentFederalTaxExpenseBenefit | 13,741,000 us-gaap_CurrentFederalTaxExpenseBenefit | 15,585,000 us-gaap_CurrentFederalTaxExpenseBenefit
State | 137,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 5,930,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 5,273,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Total current tax expense | 5,732,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 19,671,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 20,858,000 us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred |  |  |
Federal | 24,815,000 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 14,769,000 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 13,088,000 us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State | 7,501,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 1,343,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 1,999,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Total deferred tax expense | 32,316,000 us-gaap_DeferredIncomeTaxExpenseBenefit | 16,112,000 us-gaap_DeferredIncomeTaxExpenseBenefit | 15,087,000 us-gaap_DeferredIncomeTaxExpenseBenefit
Reconciliations of the effective tax rates to the federal statutory rate |  |  |
Federal taxes on pretax income at statutory rate | 34,687,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 34,464,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 31,533,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Flow-through on removal costs | (643,000)awr_IncomeTaxReconciliationProductionActivities | (2,944,000)awr_IncomeTaxReconciliationProductionActivities | (553,000)awr_IncomeTaxReconciliationProductionActivities
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | (91,000)us-gaap_IncomeTaxReconciliationTaxCreditsInvestment | (91,000)us-gaap_IncomeTaxReconciliationTaxCreditsInvestment | (91,000)us-gaap_IncomeTaxReconciliationTaxCreditsInvestment
Income tax expense/(benefit) | 38,048,000 us-gaap_IncomeTaxExpenseBenefit | 35,783,000 us-gaap_IncomeTaxExpenseBenefit | 35,945,000 us-gaap_IncomeTaxExpenseBenefit
Pretax income from continuing operations | 99,106,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 98,469,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 90,093,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Effective income tax rate (as a percent) | 38.40%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 36.30%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 39.90%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Increase (decrease) in taxes resulting from: | 4,781,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 5,111,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 4,957,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Amount | 651,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation | 646,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation | 636,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation
Income Tax Reconciliation Flow Through on Pension Costs | (507,000)awr_IncomeTaxReconciliationFlowThroughOnPensionCosts | 612,000 awr_IncomeTaxReconciliationFlowThroughOnPensionCosts | 10,000 awr_IncomeTaxReconciliationFlowThroughOnPensionCosts
Income Tax Reconciliation Cost of Removal | (1,571,000)awr_IncomeTaxReconciliationCostofRemoval | (2,141,000)awr_IncomeTaxReconciliationCostofRemoval | (943,000)awr_IncomeTaxReconciliationCostofRemoval
Operating Loss Carryforwards, Valuation Allowance | 0 us-gaap_OperatingLossCarryforwardsValuationAllowance |  |
Income Tax Examination, Penalties Accrued | 0 us-gaap_IncomeTaxExaminationPenaltiesAccrued |  |
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 741,000 us-gaap_IncomeTaxReconciliationOtherAdjustments | 126,000 us-gaap_IncomeTaxReconciliationOtherAdjustments | 396,000 us-gaap_IncomeTaxReconciliationOtherAdjustments
Tax Authorities |  |  |
Taxes on income |  |  |
Net interest receivable | 504,000 us-gaap_InterestReceivable / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember | 757,000 us-gaap_InterestReceivable / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember | 2,838,000 us-gaap_InterestReceivable / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember
Recognized interest income | 19,000 us-gaap_InterestIncomeOther / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember | 99,000 us-gaap_InterestIncomeOther / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember | 473,000 us-gaap_InterestIncomeOther / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember
AWR Parent |  |  |
Reconciliations of the effective tax rates to the federal statutory rate |  |  |
Income tax expense/(benefit) | (996,000)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (2,262,000)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8,000 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Pretax income from continuing operations | 60,062,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 60,424,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 54,156,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Operating Loss Carryforwards | 3,600,000 us-gaap_OperatingLossCarryforwards / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
GSWC |  |  |
Deferred tax assets: |  |  |
Regulatory-liability-related: ITC and excess deferred taxes | 1,001,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToITCAndExcessDeferredTaxes / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 1,049,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToITCAndExcessDeferredTaxes / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Regulatory-liability-related: California Corp Franchise Tax | 4,328,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToStateFranchiseTax / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 4,337,000 awr_DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToStateFranchiseTax / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Other nonproperty-related | 2,136,000 awr_DeferredTaxAssetsOtherNonproperty / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 3,292,000 awr_DeferredTaxAssetsOtherNonproperty / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Contributions and advances | 8,335,000 awr_DeferredTaxAssetsContributionsAndAdvances / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 8,655,000 awr_DeferredTaxAssetsContributionsAndAdvances / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Deferred tax assets | 15,800,000 us-gaap_DeferredTaxAssetsGross / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 17,333,000 us-gaap_DeferredTaxAssetsGross / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Deferred tax liabilities: |  |  |
Fixed assets | (164,724,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (131,548,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Regulatory-asset-related: depreciation and other | (22,941,000)us-gaap_DeferredTaxLiabilitiesRegulatoryAssets / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (21,575,000)us-gaap_DeferredTaxLiabilitiesRegulatoryAssets / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Deferred Tax Liabilities, Regulatory Assets and Liabilities Related to State Franchise Tax | (4,831,000)awr_DeferredTaxLiabilitiesRegulatoryAssetsandLiabilitiesRelatedtoStateFranchiseTax / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (1,749,000)awr_DeferredTaxLiabilitiesRegulatoryAssetsandLiabilitiesRelatedtoStateFranchiseTax / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Other nonproperty-related | (59,000)awr_DeferredTaxLiabilitiesOtherNonproperty / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (155,000)awr_DeferredTaxLiabilitiesOtherNonproperty / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Balancing and memorandum accounts | (4,071,000)awr_DeferredTaxLiabilitiesBalancingAndMemorandumAccounts / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (6,663,000)awr_DeferredTaxLiabilitiesBalancingAndMemorandumAccounts / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Deferred charges | (5,461,000)us-gaap_DeferredTaxLiabilitiesDeferredExpense / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (6,064,000)us-gaap_DeferredTaxLiabilitiesDeferredExpense / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Deferred tax liabilities | (202,087,000)us-gaap_DeferredIncomeTaxLiabilities / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (167,754,000)us-gaap_DeferredIncomeTaxLiabilities / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Accumulated deferred income taxes - net | (186,287,000)us-gaap_DeferredTaxLiabilities / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (150,421,000)us-gaap_DeferredTaxLiabilities / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Current |  |  |
Federal | 408,000 us-gaap_CurrentFederalTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 10,768,000 us-gaap_CurrentFederalTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 7,957,000 us-gaap_CurrentFederalTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
State | (2,754,000)us-gaap_CurrentStateAndLocalTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 6,315,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 3,830,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Total current tax expense | (2,346,000)us-gaap_CurrentIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 17,083,000 us-gaap_CurrentIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 11,787,000 us-gaap_CurrentIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Deferred |  |  |
Federal | 24,373,000 us-gaap_DeferredFederalIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 14,691,000 us-gaap_DeferredFederalIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 12,670,000 us-gaap_DeferredFederalIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
State | 9,979,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 1,360,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 2,043,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Total deferred tax expense | 34,352,000 us-gaap_DeferredIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 16,051,000 us-gaap_DeferredIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 14,713,000 us-gaap_DeferredIncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Reconciliations of the effective tax rates to the federal statutory rate |  |  |
Federal taxes on pretax income at statutory rate | 27,952,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 28,622,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 23,002,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Flow-through on removal costs | (55,000)awr_IncomeTaxReconciliationProductionActivities / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (1,316,000)awr_IncomeTaxReconciliationProductionActivities / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (553,000)awr_IncomeTaxReconciliationProductionActivities / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | (91,000)us-gaap_IncomeTaxReconciliationTaxCreditsInvestment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (91,000)us-gaap_IncomeTaxReconciliationTaxCreditsInvestment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (91,000)us-gaap_IncomeTaxReconciliationTaxCreditsInvestment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Income tax expense/(benefit) | 32,006,000 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 33,134,000 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 26,500,000 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Pretax income from continuing operations | 79,863,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 81,776,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 65,720,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Effective income tax rate (as a percent) | 40.10%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 40.50%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 40.30%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Increase (decrease) in taxes resulting from: | 4,693,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 5,372,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 4,048,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Amount | 651,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 646,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 636,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Income Tax Reconciliation Flow Through on Pension Costs | (507,000)awr_IncomeTaxReconciliationFlowThroughOnPensionCosts / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 612,000 awr_IncomeTaxReconciliationFlowThroughOnPensionCosts / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 10,000 awr_IncomeTaxReconciliationFlowThroughOnPensionCosts / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Income Tax Reconciliation Cost of Removal | (1,571,000)awr_IncomeTaxReconciliationCostofRemoval / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (2,141,000)awr_IncomeTaxReconciliationCostofRemoval / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | (943,000)awr_IncomeTaxReconciliationCostofRemoval / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Operating Loss Carryforwards | 9,300,000 us-gaap_OperatingLossCarryforwards / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |  |
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 934,000 us-gaap_IncomeTaxReconciliationOtherAdjustments / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 1,430,000 us-gaap_IncomeTaxReconciliationOtherAdjustments / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 391,000 us-gaap_IncomeTaxReconciliationOtherAdjustments / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
GSWC | Tax Authorities |  |  |
Taxes on income |  |  |
Net interest receivable | 472,000 us-gaap_InterestReceivable / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 704,000 us-gaap_InterestReceivable / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 2,775,000 us-gaap_InterestReceivable / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Recognized interest income | 14,000 us-gaap_InterestIncomeOther / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 21,000 us-gaap_InterestIncomeOther / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 461,000 us-gaap_InterestIncomeOther / us-gaap_IncomeTaxAuthorityAxis = awr_IncomeTaxAuthoritiesMember / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
Tax Year 2013 [Member] |  |  |
Taxes on income |  |  |
Deferred Tax Liabilities Related to Repair-And-Maintenance Deductions | 22,500,000 awr_DeferredTaxLiabilitiesRelatedtoRepairAndMaintenanceDeductions / us-gaap_TaxPeriodAxis = us-gaap_TaxYear2013Member |  |
Tax Year 2013 [Member] | US Treasury and Government [Member] |  |  |
Taxes on income |  |  |
Other Deductions or Allowable Credits | 47,000,000 us-gaap_OtherDeductionsOrAllowableCredits / us-gaap_IncomeTaxAuthorityAxis = us-gaap_USTreasuryAndGovernmentMember / us-gaap_TaxPeriodAxis = us-gaap_TaxYear2013Member |  |
Tax Year 2013 [Member] | State and Local Jurisdiction [Member] |  |  |
Taxes on income |  |  |
Other Deductions or Allowable Credits | 107,000,000 us-gaap_OtherDeductionsOrAllowableCredits / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember / us-gaap_TaxPeriodAxis = us-gaap_TaxYear2013Member |  |
Latest Tax Year [Member] |  |  |
Taxes on income |  |  |
Deferred Tax Liabilities Related to Repair-And-Maintenance Deductions | 20,300,000 awr_DeferredTaxLiabilitiesRelatedtoRepairAndMaintenanceDeductions / us-gaap_TaxPeriodAxis = us-gaap_LatestTaxYearMember |  |
Other Deductions or Allowable Credits | $ 8,300,000 us-gaap_OtherDeductionsOrAllowableCredits / us-gaap_TaxPeriodAxis = us-gaap_LatestTaxYearMember |  |

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- Definition Represents the amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences derived from contributions and advances. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences derived from regulatory assets and liabilities related to state franchise tax. + References No definition available. + Details
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- Definition Represents the amount of deferred tax liability attributable to taxable temporary differences from balancing and memorandum accounts. + References No definition available. + Details
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- Definition Represents the amount of deferred tax liability attributable to taxable temporary differences from other nonproperty. + References No definition available. + Details
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- Definition Deferred Tax Liabilities, Regulatory Assets and Liabilities Related to State Franchise Tax + References No definition available. + Details
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- Definition The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to flow-through on Cost of Removal. + References No definition available. + Details
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