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v2.4.1.9

Income Taxes: (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Effective income tax rate |  |  |
Deferred Tax Liabilities Related to Repair-And-Maintenance Deductions |  |  | $ 30.8 awr_DeferredTaxLiabilitiesRelatedtoRepairAndMaintenanceDeductions
GSWC |  |  |
Effective income tax rate |  |  |
ETRs (as a percent) | 41.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember | 37.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations / dei_LegalEntityAxis = awr_GoldenStateWaterCompanyMember |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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