XML 32 R77.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Business Segments (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting [Abstract] |  |  |
Total utility plant | $ 1,003,520,000 us-gaap_PropertyPlantAndEquipmentNet | $ 981,477,000 us-gaap_PropertyPlantAndEquipmentNet | $ 917,791,000 us-gaap_PropertyPlantAndEquipmentNet
Other assets | 374,778,000 awr_AssetsOtherThanPropertyPlantAndEquipmentNet | 328,706,000 awr_AssetsOtherThanPropertyPlantAndEquipmentNet | 363,152,000 awr_AssetsOtherThanPropertyPlantAndEquipmentNet
Total Assets | 1,378,298,000 us-gaap_Assets | 1,310,183,000 us-gaap_Assets | 1,280,943,000 us-gaap_Assets
GSWC |  |  |
Segment Reporting [Abstract] |  |  |
Total utility plant | 998,880,000 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 977,294,000 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Total Assets | 1,282,374,000 us-gaap_Assets / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 1,233,381,000 us-gaap_Assets / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |
Segment Reporting Information [Line Items] |  |  |
Depreciation on transportation equipment | 678,000 awr_PublicUtilitiesPropertyPlantAndEquipmentDepreciationOnTransportationEquipment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 877,000 awr_PublicUtilitiesPropertyPlantAndEquipmentDepreciationOnTransportationEquipment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 1,800,000 awr_PublicUtilitiesPropertyPlantAndEquipmentDepreciationOnTransportationEquipment / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember
AWR Parent |  |  |
Segment Reporting [Abstract] |  |  |
Total utility plant | 0 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total Assets | 517,246,000 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 495,273,000 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
American States Utility Services [Member] | American States Utility Services [Member] |  |  |
Segment Reporting [Abstract] |  |  |
Total utility plant | 4,640,000 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = awr_AmericanStatesUtilityServicesMember / us-gaap_StatementBusinessSegmentsAxis = awr_ContractedServicesMember | 4,183,000 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = awr_AmericanStatesUtilityServicesMember / us-gaap_StatementBusinessSegmentsAxis = awr_ContractedServicesMember | 4,654,000 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = awr_AmericanStatesUtilityServicesMember / us-gaap_StatementBusinessSegmentsAxis = awr_ContractedServicesMember
Segment Reporting Information [Line Items] |  |  |
Error Corrections and Prior Period Adjustments | $ 1,600,000 awr_ErrorCorrectionsandPriorPeriodAdjustments / dei_LegalEntityAxis = awr_AmericanStatesUtilityServicesMember / us-gaap_StatementBusinessSegmentsAxis = awr_ContractedServicesMember |  |

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets except utility plant that are recognized. + References No definition available. + Details
Name: | awr_AssetsOtherThanPropertyPlantAndEquipmentNet
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Error Corrections and Prior Period Adjustments + References No definition available. + Details
Name: | awr_ErrorCorrectionsandPriorPeriodAdjustments
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of transportation equipment over the assets' useful lives. + References No definition available. + Details
Name: | awr_PublicUtilitiesPropertyPlantAndEquipmentDepreciationOnTransportationEquipment
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_ParentCompanyMember
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: |