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v3.21.2

Summary of Significant Accounting Policies: (Details) |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 24, 2021 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) customer registrant | Jun. 30, 2020 USD ($) | Oct. 30, 2020 USD ($) | Jul. 01, 2020 USD ($)
Basis of Presentation [Abstract] |  |  |  |  |  |  |
Number of registrants filing combined report | registrant |  |  |  | 2 |  |  |
Nature of Operations: |  |  |  |  |  |  |
Number of customers | customer |  |  |  | 1,000,000 |  |  |
Number of States in which Entity Operates |  | 9 |  | 9 |  |  |
Related Party Transactions |  |  |  |  |  |  |
Incremental expansion of borrowing capacity |  |  |  |  |  | $ 30,000,000 |
Parent Company [Member] | Syndicated Revolving Credit Facility member [Member] |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |
Notes Payable, Noncurrent |  | $ 162,000,000.0 |  | $ 162,000,000.0 |  |  |
ASUS |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |
Payments to affiliate for corporate office administrative and general costs |  | 1,300,000 | $ 1,200,000 | $ 2,800,000 | $ 2,700,000 |  |
ASUS | Contracted Services |  |  |  |  |  |  |
Nature of Operations: |  |  |  |  |  |  |
Period of fixed price contracts to operate and maintain water systems at various military bases |  |  |  | 50 years |  |  |
Bear Valley Electric Service, Inc. |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |
Payments to affiliate for corporate office administrative and general costs |  | 679,000 | $ 700,000 | $ 1,500,000 | $ 1,500,000 |  |
Maximum borrowing capacity on line of credit |  |  |  |  |  |  | $ 35,000,000
Incremental expansion of borrowing capacity |  | 15,000,000 |  | 15,000,000 |  |  |
Outstanding borrowings |  | 26,000,000.0 |  | 26,000,000.0 |  |  |
COVID-19 Impact [Line Items] |  |  |  |  |  |  |
Funding for overdue electric bills per Budget Act of 2021 |  | 1,000,000,000 |  | $ 1,000,000,000 |  |  |
Bear Valley Electric Service, Inc. | Electric Service Utility Operations |  |  |  |  |  |  |
Nature of Operations: |  |  |  |  |  |  |
Number of customers | customer |  |  |  | 24,500 |  |  |
Golden State Water Company |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |
Related Party Transaction, Terms and Manner of Settlement |  |  |  | 24 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 9.56% |  |  |  |  |  |
Debt Instrument, Face Amount | $ 28,000,000.0 |  |  |  |  |  |
Debt Instrument Redemption Premium as Percentage of Par Value after Specified Period | 3.00% |  |  |  |  |  |
Redemption price of debt instrument | $ 840,000 |  |  |  |  |  |
Notes Payable, Related Parties |  | 0 |  | $ 0 |  |  |
COVID-19 Impact [Line Items] |  |  |  |  |  |  |
Water Utility Relief Funding for Overdue Water Bills per Budget Act of 2021 [Line Items] |  | 1,000,000,000 |  | $ 1,000,000,000 |  |  |
Golden State Water Company | Water Service Utility Operations |  |  |  |  |  |  |
Nature of Operations: |  |  |  |  |  |  |
Number of customers | customer |  |  |  | 262,000 |  |  |
Golden State Water Company and Bear Valley Electric Service Inc. |  |  |  |  |  |  |
COVID-19 Impact [Line Items] |  |  |  |  |  |  |
Regulatory asset-CEMA |  | 6,700,000 |  | $ 6,700,000 |  |  |
Maximum [Member] | Parent Company [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  | $ 200,000,000.0 |  | $ 200,000,000.0 |  |  |

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