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v2.4.1.9

Income Taxes Components of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Deferred tax assets: |  |  |  |
Advances and contributions |  | $ 16,212sjw_DeferredTaxAssetsAdvancesAndContributions | $ 15,598sjw_DeferredTaxAssetsAdvancesAndContributions |
Unamortized investment tax credit |  | 709us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness | 741us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness |
Pensions and postretirement benefits |  | 4,216sjw_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits | 4,405sjw_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits |
California franchise tax |  | 0us-gaap_DeferredTaxAssetsStateTaxes | 1,107us-gaap_DeferredTaxAssetsStateTaxes |
Net operating loss |  | 5,065us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 5,814us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Other |  | 1,697us-gaap_DeferredTaxAssetsOther | 1,596us-gaap_DeferredTaxAssetsOther |
Total deferred tax assets |  | 27,899us-gaap_DeferredTaxAssetsGross | 29,261us-gaap_DeferredTaxAssetsGross |
Deferred tax liabilities: |  |  |  |
Utility plant |  | 150,662us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 125,706us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
Pension and postretirement benefits |  | 47,059sjw_DeferredTaxLiabilitiesPensionAndPostretirementBenefits | 25,649sjw_DeferredTaxLiabilitiesPensionAndPostretirementBenefits |
Investment in stock |  | 2,335us-gaap_DeferredTaxLiabilitiesInvestments | 3,228us-gaap_DeferredTaxLiabilitiesInvestments |
Deferred gain and other-property related |  | 11,695sjw_DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated | 13,107sjw_DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated |
Debt reacquisition costs |  | 443us-gaap_DeferredTaxLiabilitiesFinancingArrangements | 496us-gaap_DeferredTaxLiabilitiesFinancingArrangements |
Other |  | 1,211us-gaap_DeferredTaxLiabilitiesOther | 1,811us-gaap_DeferredTaxLiabilitiesOther |
Total deferred tax liabilities |  | 213,405us-gaap_DeferredIncomeTaxLiabilities | 169,997us-gaap_DeferredIncomeTaxLiabilities |
Net deferred tax liabilities |  | 185,506us-gaap_DeferredTaxLiabilitiesNoncurrent | 140,736us-gaap_DeferredTaxLiabilitiesNoncurrent |
Income Tax Credits and Adjustments | 880us-gaap_IncomeTaxCreditsAndAdjustments |  |  |
Provision for income taxes |  | 24,971us-gaap_IncomeTaxExpenseBenefit | 14,135us-gaap_IncomeTaxExpenseBenefit | 15,542us-gaap_IncomeTaxExpenseBenefit
Federal |  |  |  |
Deferred tax liabilities: |  |  |  |
Net operating loss carryforward |  | 14,051us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |  |
Operating loss carryforward as reported on tax return |  | 15,603sjw_OperatingLossCarryforwardasReportedonTaxReturn / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |  |
State and Local Jurisdiction [Member] |  |  |  |
Deferred tax liabilities: |  |  |  |
Income Tax Credits and Adjustments |  | 77,999us-gaap_IncomeTaxCreditsAndAdjustments / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |
Operating loss carryforward as reported on tax return |  | 1,659sjw_OperatingLossCarryforwardasReportedonTaxReturn / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |
Provision for income taxes |  | 4,482us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |
Domestic Tax Authority [Member] |  |  |  |
Deferred tax liabilities: |  |  |  |
Other |  | 12,569us-gaap_DeferredTaxLiabilitiesOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
Income Tax Credits and Adjustments |  | 35,912us-gaap_IncomeTaxCreditsAndAdjustments / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
2014 Federal and State Repairs and Maintenance Deduction [Member] |  |  |  |
Deferred tax liabilities: |  |  |  |
Income Tax Credits and Adjustments |  | 11,221us-gaap_IncomeTaxCreditsAndAdjustments / us-gaap_TaxCreditCarryforwardAxis = sjw_A2014FederalandStateRepairsandMaintenanceDeductionMember |  |
2014 Federal and State Repairs and Maintenance Deduction [Member] | State and Local Jurisdiction [Member] |  |  |  |
Deferred tax liabilities: |  |  |  |
Provision for income taxes |  | (645)us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember / us-gaap_TaxCreditCarryforwardAxis = sjw_A2014FederalandStateRepairsandMaintenanceDeductionMember |  |
2014 Federal and State Repairs and Maintenance Deduction [Member] | Domestic Tax Authority [Member] |  |  |  |
Deferred tax liabilities: |  |  |  |
Other |  | $ 3,927us-gaap_DeferredTaxLiabilitiesOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember / us-gaap_TaxCreditCarryforwardAxis = sjw_A2014FederalandStateRepairsandMaintenanceDeductionMember |  |

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