XML 63 R47.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Revenues Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 436,816 |  |
Regulated Operating Revenue,Water | 295,258 | $ 306,332 | $ 302,931
Golden State Water Company [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Regulated Operating Revenue,Water | 295,258 | $ 306,332 | $ 302,931
Golden State Water Company [Member] | Water Service Utility Operations [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 295,258 |  |
Golden State Water Company [Member] | Water Service Utility Operations [Member] | Water Revenue Adjustment Mechanism [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Regulated Operating Revenue,Water | (8,335) |  |
Golden State Water Company [Member] | Electric Service Utility Operations [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 34,350 |  |
Golden State Water Company [Member] | Electric Service Utility Operations [Member] | Water Revenue Adjustment Mechanism [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
BRRAM over-collection (alternative revenue program) | (365) |  |
American States Utility Services [Member] | Contracted Services [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 107,208 |  |
American States Utility Services [Member] | Contracted Services [Member] | Wastewater [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 44,935 |  |
American States Utility Services [Member] | Contracted Services [Member] | Water [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 62,273 |  |
Billed Revenues [Member] | Golden State Water Company [Member] | Water Service Utility Operations [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 303,593 |  |
Billed Revenues [Member] | Golden State Water Company [Member] | Water Service Utility Operations [Member] | Tariff-based Revenues [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 298,818 |  |
Billed Revenues [Member] | Golden State Water Company [Member] | Water Service Utility Operations [Member] | Surcharges (Cost-recovery Activities) [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 2,962 |  |
Billed Revenues [Member] | Golden State Water Company [Member] | Water Service Utility Operations [Member] | Other Products and Services [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 1,813 |  |
Billed Revenues [Member] | Golden State Water Company [Member] | Electric Service Utility Operations [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 34,715 |  |
Billed Revenues [Member] | Golden State Water Company [Member] | Electric Service Utility Operations [Member] | Tariff-based Revenues [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 34,501 |  |
Billed Revenues [Member] | Golden State Water Company [Member] | Electric Service Utility Operations [Member] | Surcharges (Cost-recovery Activities) [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 214 |  |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of regulated power revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedOperatingRevenueElectricNonNuclear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of regulated water operating revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedOperatingRevenueWater
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 32 -Paragraph 2A -URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=awr_WaterServiceUtilityOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=awr_AlternativerevenueprogramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=awr_ElectricServiceUtilityOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=awr_ContractedServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=awr_WastewaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=us-gaap_PublicUtilitiesInventoryWaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis=us-gaap_BilledRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=awr_TariffbasedRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=awr_SurchargesCostrecoveryActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=awr_OtherProductsandServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |