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SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and equivalents | $ 75,988 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 38,226 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 23,486 us-gaap_CashAndCashEquivalentsAtCarryingValue |
Deferred tax assets | 7,435 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent | 9,553 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent |  |
Income taxes receivable and other receivables | 20,993 us-gaap_IncomeTaxesReceivable | 9,214 us-gaap_IncomeTaxesReceivable |  |
Total current assets | 209,451 us-gaap_AssetsCurrent | 191,617 us-gaap_AssetsCurrent |  |
Other assets | 12,105 us-gaap_OtherAssetsNoncurrent | 14,227 us-gaap_OtherAssetsNoncurrent |  |
Total Assets | 1,378,298 us-gaap_Assets | 1,310,183 us-gaap_Assets | 1,280,943 us-gaap_Assets |
Income taxes payable | 638 us-gaap_TaxesPayableCurrent | 507 us-gaap_TaxesPayableCurrent |  |
Liabilities and Capitalization |  |  |  |
Other | 99,290 us-gaap_LiabilitiesCurrent | 100,906 us-gaap_LiabilitiesCurrent |  |
Deferred taxes | 191,209 us-gaap_DeferredTaxLiabilitiesNoncurrent | 159,506 us-gaap_DeferredTaxLiabilitiesNoncurrent |  |
Other | 446,409 us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent | 390,794 us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent |  |
Common shareholders' equity | 506,801 us-gaap_StockholdersEquity | 492,404 us-gaap_StockholdersEquity | 454,579 us-gaap_StockholdersEquity | 408,666 us-gaap_StockholdersEquity
Total capitalization | 832,599 us-gaap_CapitalizationLongtermDebtAndEquity | 818,483 us-gaap_CapitalizationLongtermDebtAndEquity |  |
Total Capitalization and Liabilities | 1,378,298 us-gaap_LiabilitiesAndStockholdersEquity | 1,310,183 us-gaap_LiabilitiesAndStockholdersEquity |  |
AWR |  |  |  |
Assets |  |  |  |
Cash and equivalents | 31,629 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 107 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Inter-company loan receivables | 1,445 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 21,113 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Deferred tax assets | 503 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 388 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Income taxes receivable and other receivables | 44 us-gaap_IncomeTaxesReceivable / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,733 us-gaap_IncomeTaxesReceivable / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total current assets | 33,621 us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 23,341 us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Investments in subsidiaries | 478,677 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 468,568 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other assets | 4,948 us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,364 us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total Assets | 517,246 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 495,273 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Due to Related Parties, Current | 0 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 500 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Income taxes payable | 9,902 us-gaap_TaxesPayableCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,851 us-gaap_TaxesPayableCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Liabilities and Capitalization |  |  |  |
Deferred taxes and other liabilities | 154 awr_DeferredTaxesAndOtherLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 84 awr_DeferredTaxesAndOtherLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other | 10,056 us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,435 us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Deferred taxes | 100 us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 146 us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Income taxes payable and other liabilities | 289 awr_AccruedIncomeTaxesAndOtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 288 awr_AccruedIncomeTaxesAndOtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other | 389 us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 434 us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Common shareholders' equity | 506,801 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 492,404 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total capitalization | 506,801 us-gaap_CapitalizationLongtermDebtAndEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 492,404 us-gaap_CapitalizationLongtermDebtAndEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total Capitalization and Liabilities | $ 517,246 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 495,273 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |

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