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Summary of Significant Accounting Policies: (Details) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) customer registrant | Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) | Oct. 27, 2015 USD ($)
Basis of Presentation: |  |  |  |  |  |
Number of registrants filing combined report | registrant |  |  | 2 |  |  |
Related Party Transactions |  |  |  |  |  |
Notes payable to bank | $ 63,500,000 |  | $ 63,500,000 |  | $ 28,000,000 |
Sales and Use Taxes: |  |  |  |  |  |
Non-income tax assessments accounted on a gross basis | 4,168,000 | $ 4,060,000 | 8,546,000 | $ 8,336,000 |  |
Debt issuance costs | 4,500,000 | 4,800,000 | 4,500,000 | 4,800,000 | $ 4,600,000 |
AWR | Promissory Note | Notes Receivable [Member] |  |  |  |  |  |
Sales and Use Taxes: |  |  |  |  |  |
Notes receivable | 0 |  | 0 |  |  |
AWR | Syndicated Credit Facility |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Maximum borrowing capacity on line of credit | 100,000,000 |  | 100,000,000 |  |  |
GOLDEN STATE WATER COMPANY |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Payments to affiliate for corporate office administrative and general costs | 969,000 | 609,000 | 2,000,000 | 1,300,000 |  |
Sales and Use Taxes: |  |  |  |  |  |
Franchise fees billed to customers and recorded as operating revenue | 1,000,000 | 996,000 |  | 1,900,000 |  |
Non-income tax assessments accounted on a gross basis | 3,823,000 | 3,748,000 | $ 7,810,000 | 7,666,000 |  |
GOLDEN STATE WATER COMPANY | Promissory Note |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 40,000,000
Debt instrument, maximum borrowing capacity |  |  |  |  |  | 40,000,000
GOLDEN STATE WATER COMPANY | Purchase, production, distribution and sale of water |  |  |  |  |  |
Nature of Operations: |  |  |  |  |  |
Number of customers served | customer |  |  | 261,000 |  |  |
GOLDEN STATE WATER COMPANY | Electricity distribution |  |  |  |  |  |
Nature of Operations: |  |  |  |  |  |
Number of customers served | customer |  |  | 24,000 |  |  |
ASUS |  |  |  |  |  |
Sales and Use Taxes: |  |  |  |  |  |
Non-income tax assessments accounted on a gross basis | $ 84,000 | $ 53,000 | $ 146,000 | $ 86,000 |  |
ASUS | Promissory Note |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | 10,000,000
Debt instrument, maximum borrowing capacity |  |  |  |  |  | $ 10,000,000
ASUS | Contracts |  |  |  |  |  |
Nature of Operations: |  |  |  |  |  |
Period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases |  |  | 50 years |  |  |
Sales and Use Taxes: |  |  |  |  |  |
Period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases |  |  | 50 years |  |  |
Sales | GOLDEN STATE WATER COMPANY | Purchase, production, distribution and sale of water |  |  |  |  |  |
Nature of Operations: |  |  |  |  |  |
Percentage of total revenue | 90.00% | 90.00% | 90.00% | 90.00% |  |

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