XML 26 R29.htm IDEA: XBRL DOCUMENT
v3.20.1

Revenue from Contract with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Disaggregation of Revenue [Line Items] |  |
WRAM under (over)-collection (alternative revenue program) | $ (71,424) | $ (64,723)
BRRAM under (over)-collection (alternative revenue program) | (10,968) | (10,629)
Total operating revenues | 109,077 | 101,733
GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
WRAM under (over)-collection (alternative revenue program) | (71,424) | (64,723)
BRRAM under (over)-collection (alternative revenue program) | (10,968) | (10,629)
Total operating revenues | 82,392 | 75,352
Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 70,483 | 60,325
Regulated Operating Revenue | 941 |
Total operating revenues | 71,424 | 64,723
Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 10,290 | 11,320
BRRAM under (over)-collection (alternative revenue program) | (678) | 691
Total operating revenues | 10,968 | 10,629
Contracted Services | ASUS |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 26,685 | 26,381
Tariff-based Revenues | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 69,254 | 59,575
Tariff-based Revenues | Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 10,032 | 11,266
Surcharges (Cost-recovery Activities) | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 734 | 291
Surcharges (Cost-recovery Activities) | Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 258 | 54
Other Products and Services | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 495 | 459
Alternative revenues program [Member] | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
WRAM under (over)-collection (alternative revenue program) |  | (4,398)
Water | Contracted Services | ASUS |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 14,701 | 13,355
Wastewater | Contracted Services | ASUS |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | $ 11,984 | $ 13,026
Sales | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Concentration Risk, Percentage | 90.00% |
Sales | Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |
Disaggregation of Revenue [Line Items] |  |
Concentration Risk, Percentage | 90.00% |

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of regulated operating revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedOperatingRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of regulated power revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedOperatingRevenueElectricNonNuclear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of regulated water operating revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedOperatingRevenueWater
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | srt_ProductOrServiceAxis=awr_TariffbasedRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=awr_SurchargesCostrecoveryActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=awr_OtherProductsandServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=awr_AlternativerevenuesprogramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_PublicUtilitiesInventoryWaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=awr_WastewaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |