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v3.20.1

Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2020
Changes in allowance for doubtful accounts |  |
Balance at beginning of year | $ 916 |
Increase to provision | 393 |
Accounts written off, net of recoveries | (164) |
Balance at end of year | 1,145 |
Components of allowance for doubtful accounts |  |
Allowance for doubtful accounts related to accounts receivable-customer |  | $ 1,086
Allowance for doubtful accounts related to receivable from U.S. government |  | 0
Allowance for doubtful accounts related to other accounts receivable |  | 59
Total allowance for doubtful accounts | 1,145 | 1,145
GOLDEN STATE WATER COMPANY |  |
Changes in allowance for doubtful accounts |  |
Balance at beginning of year | 916 |
Increase to provision | 393 |
Accounts written off, net of recoveries | (164) |
Balance at end of year | 1,145 |
Components of allowance for doubtful accounts |  |
Allowance for doubtful accounts related to accounts receivable-customer |  | 1,086
Allowance for doubtful accounts related to receivable from U.S. government |  | 0
Allowance for doubtful accounts related to other accounts receivable |  | 59
Total allowance for doubtful accounts | $ 1,145 | $ 1,145

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

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- Definition Represents the amount of direct write-downs of receivables, net of recoveries, charged against the allowance for doubtful accounts. + References No definition available. + Details
Name: | awr_AllowanceForDoubtfulAccountsReceivableChargeOffsNetOfRecoveries
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the provision for doubtful accounts related to other accounts receivable. + References No definition available. + Details
Name: | awr_AllowanceForDoubtfulAccountsRelatedToOtherAccountsReceivable
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Represents the provision for doubtful accounts related to accounts receivable from customers. + References No definition available. + Details
Name: | awr_AllowanceForDoubtfulAccountsRelatedToReceivableFromCustomer
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Represents the provision for doubtful accounts related to receivable from the U.S. government. + References No definition available. + Details
Name: | awr_AllowanceForDoubtfulAccountsRelatedToReceivableFromUSGovernment
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of the current period expense charged against continuing operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected). + References No definition available. + Details
Name: | awr_ProvisionForDoubtfulAccountsContinuingOperation
Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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- Details
Name: | dei_LegalEntityAxis=awr_GoldenStateWaterCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |