XML 41 R28.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Regulatory Matters: (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Regulatory matters: |  |  |
Regulatory asset not accruing carrying costs | $ 59,100 |  |
Pension and other post-retirement obligations |  |  |
Regulatory matters: |  |  |
Regulatory asset not accruing carrying costs | 34,200 |  |
GOLDEN STATE WATER COMPANY |  |  |
Regulatory matters: |  |  |
Regulatory assets | (4,728) |  | $ 2,042
GOLDEN STATE WATER COMPANY | Revenue Subject to Refund |  |  |
Regulatory matters: |  |  |
Regulatory assets | (9,592) |  | (4,552)
GOLDEN STATE WATER COMPANY | Water Revenue Adjustment Mechanism, net of Modified Cost Balancing Account |  |  |
Regulatory matters: |  |  |
Amount billed to customers as surcharges | 4,200 | $ 4,000 |
Regulatory assets | 29,011 |  | 29,556
GOLDEN STATE WATER COMPANY | Costs deferred for future recovery on Aerojet case |  |  |
Regulatory matters: |  |  |
Regulatory assets | 10,510 |  | 10,656
GOLDEN STATE WATER COMPANY | Pension and other post-retirement obligations |  |  |
Regulatory matters: |  |  |
Regulatory assets | 32,178 |  | 33,019
GOLDEN STATE WATER COMPANY | Derivative unrealized loss |  |  |
Regulatory matters: |  |  |
Regulatory assets | 2,625 |  | 2,941
GOLDEN STATE WATER COMPANY | Low income rate assistance balancing accounts |  |  |
Regulatory matters: |  |  |
Regulatory assets | 5,640 |  | 5,972
GOLDEN STATE WATER COMPANY | General Rate Case Memorandum Accounts |  |  |
Regulatory matters: |  |  |
Regulatory assets | 9,264 |  | 10,522
GOLDEN STATE WATER COMPANY | Deferred Income Tax Charge |  |  |
Regulatory matters: |  |  |
Regulatory assets | (82,680) |  | (83,231)
GOLDEN STATE WATER COMPANY | Flow-through taxes, net |  |  |
Regulatory matters: |  |  |
Regulatory assets | (17,133) |  | (17,716)
GOLDEN STATE WATER COMPANY | Other Regulatory Assets Net [Member] |  |  |
Regulatory matters: |  |  |
Regulatory assets | $ 15,449 |  | $ 14,875

X
- Definition Represents amount billed to customers as surcharges. + References No definition available. + Details
Name: | awr_RegulatoryAssetAmountBilledToCustomersAsSurcharges
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the regulatory asset not accruing carrying costs as of the balance sheet date. + References No definition available. + Details
Name: | awr_RegulatoryAssetNotAccruingCarryingCosts
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | awr_RegulatoryAssetsAndLiabilitiesLineItems
Namespace Prefix: | awr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net amount of all regulatory assets less all regulatory liabilities as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_NetRegulatoryAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=awr_PensionCostsAndOtherPostretirementBenefitCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=awr_GoldenStateWaterCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RevenueSubjectToRefundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=awr_WaterRevenueAdjustmentMechanismNetOfModifiedCostBalancingAccountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=awr_CostsDeferredForFutureRecoveryOnAerojetCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_GainLossOnDerivativeInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=awr_LowIncomeRateAssistanceBalancingAccountsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=awr_GeneralRateCaseMemorandumAccountsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=awr_FlowThroughTaxesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=awr_OtherRegulatoryAssetsNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |