XML 43 R27.htm IDEA: XBRL DOCUMENT
v3.25.1

Summary of Significant Accounting Policies (Details) $ in Thousands | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2025 USD ($) customer registrant item state shares | Mar. 31, 2024 USD ($) shares | May 06, 2025 USD ($) | Mar. 13, 2025 USD ($) | Feb. 12, 2025 USD ($) | Dec. 31, 2024 USD ($) | Feb. 27, 2024 USD ($)
Summary of significant accounting policies |  |  |  |  |  |  |
Number of customers | customer | 1,000,000 |  |  |  |  |  |
Number of states in which entity operates | state | 10 |  |  |  |  |  |
Number of registrants filing combined report | registrant | 2 |  |  |  |  |  |
Sale of stock, maximum consideration on transaction |  |  |  |  |  |  | $ 200,000
Agreement term (in years) | 3 years |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) | shares | 334,548 | 227,981 |  |  |  |  |
Sale of stock, consideration received on transaction | $ 25,800 | $ 16,200 |  |  |  |  |
Payments for commissions | 400 | 200 |  |  |  |  |
Payments of stock issuance costs | 100 | 600 |  |  |  |  |
Sale of Stock, remaining available for sale | $ 82,900 |  |  |  |  |  |
Debt instrument term (in years) | 5 years |  |  |  |  |  |
Incremental expansion of borrowing capacity | $ 60,000 |  |  |  |  |  |
Notes payable to banks | 106,000 |  |  |  |  | $ 165,000 |
Notes payable to banks | 143,000 |  |  |  |  | 124,000 |
Syndicated Revolving Credit Facility |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Notes payable to banks | 106,000 |  |  |  |  |  |
GSWC |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Incremental expansion of borrowing capacity | $ 75,000 |  |  |  |  |  |
Intercompany borrowings payment term | 24 months |  |  |  |  |  |
Notes payable to banks | $ 143,000 |  |  |  |  | $ 124,000 |
GSWC | Financing Application |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Regulatory rate case filings requested authorization for debt and equity issuance |  |  |  | $ 750,000 |  |  |
GSWC | Syndicated Revolving Credit Facility |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Notes payable to banks | $ 143,000 |  |  |  |  |  |
GSWC | Water: |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Number of customers | customer | 264,800 |  |  |  |  |  |
BVES |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Payments to affiliate for corporate office administrative and general costs | $ 1,000 | 900 |  |  |  |  |
Intercompany borrowings payment term | 24 months |  |  |  |  |  |
Maximum borrowing capacity on line of credit | $ 65,000 |  |  |  |  |  |
Face amount of debt |  |  |  |  | $ 50,000 |  |
BVES | Electric: |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Number of customers | customer | 24,900 |  |  |  |  |  |
ASUS |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Payments to affiliate for corporate office administrative and general costs | $ 1,600 | $ 1,600 |  |  |  |  |
Bay State Utility Service LLC (" BSUS") |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Number of contracts with 15 year contract | item | 1 |  |  |  |  |  |
Bay State Utility Service LLC (" BSUS") | Contracted services: |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Period of fixed price contracts to operate and maintain water systems at various military bases | 15 years |  |  |  |  |  |
Maximum | Syndicated Revolving Credit Facility |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Current borrowing capacity | $ 165,000 |  |  |  |  |  |
Maximum | Syndicated Revolving Credit Facility | Subsequent Event |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Current borrowing capacity |  |  | $ 195,000 |  |  |  |
Maximum | GSWC | Syndicated Revolving Credit Facility |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Current borrowing capacity | $ 200,000 |  |  |  |  |  |
Maximum | ASUS |  |  |  |  |  |  |
Summary of significant accounting policies |  |  |  |  |  |  |
Period of fixed price contracts to operate and maintain water systems at various military bases | 50 years |  |  |  |  |  |

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

X
- Definition Intercompany Borrowings Payment Term + References No definition available. + Details
Name: | awr_IntercompanyBorrowingsPaymentTerm
Namespace Prefix: | awr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of Credit Facility, Incremental Expansion of Borrowing Capacity + References No definition available. + Details
Name: | awr_LineofCreditFacilityIncrementalExpansionofBorrowingCapacity
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of contracts with 15-year contract with the U.S. government. + References No definition available. + Details
Name: | awr_NumberOfContracts
Namespace Prefix: | awr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of customers who are served by the entity. + References No definition available. + Details
Name: | awr_NumberOfCustomers
Namespace Prefix: | awr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of registrants filing combined report during the period. + References No definition available. + Details
Name: | awr_NumberOfRegistrantsFilingCombinedReport
Namespace Prefix: | awr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases. + References No definition available. + Details
Name: | awr_PeriodOfFixedPriceContractsToOperateAndMaintainWaterSystemsAtVariousMilitaryBases
Namespace Prefix: | awr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Regulatory Rate Case Filings Requested Authorization For Debt And Equity Issuance Amount + References No definition available. + Details
Name: | awr_RegulatoryRateCaseFilingsRequestedAuthorizationForDebtAndEquityIssuanceAmount
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sale of Stock, Agreement Term + References No definition available. + Details
Name: | awr_SaleOfStockAgreementTerm
Namespace Prefix: | awr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sale of Stock, Maximum Consideration On Transaction + References No definition available. + Details
Name: | awr_SaleOfStockMaximumConsiderationOnTransaction
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sale of Stock, remaining available for sale under the ATM equity program + References No definition available. + Details
Name: | awr_SaleOfStockRemainingAvailableForSale
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Current portion of the total carrying amount as of the balance sheet date due within one year or the operating cycle, if longer, on all notes payable to banks paid on an installment with long term maturities. This can include the amount of any loans from the applicant firm. This does not, however, include any mortgage balances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_NotesPayableToBankCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total amount due within more than 12 month, or the operating cycle if longer, on all notes payable to banks paid on an installment. This can include the amount of any loans from the applicant firm. This does not, however, include any mortgage balances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_NotesPayableToBankNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of cash paid for commissions during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (g) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-25 + Details
Name: | us-gaap_PaymentsForCommissions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-3 + Details
Name: | us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cash received on stock transaction after deduction of issuance costs. + References No definition available. + Details
Name: | us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=awr_SyndicatedRevolvingCreditFacilityMemberMember
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_PublicUtilitiesRegulatoryProceedingAxis=awr_FinancingApplicationMember
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: | dei_LegalEntityAxis=awr_BearValleyElectricServiceIncMember
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: | dei_LegalEntityAxis=awr_BayStateUtilityServiceLLCBSUSMember
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: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=awr_SyndicatedRevolvingCreditFacilityMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |