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Regulatory Matters: (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Regulatory matters: |  |  |
Regulatory asset not accruing carrying costs | $ 53,500 |  |
Other Liabilities, Current | 10,185 |  | $ 10,209
Pension and other post-retirement obligations |  |  |
Regulatory matters: |  |  |
Regulatory asset not accruing carrying costs | 23,500 |  |
Derivative unrealized loss |  |  |
Regulatory matters: |  |  |
Regulatory asset not accruing carrying costs | 4,900 |  |
GOLDEN STATE WATER COMPANY |  |  |
Regulatory matters: |  |  |
Regulatory assets | 150,060 |  | 132,696
Other Liabilities, Current | 9,955 |  | 9,921
GOLDEN STATE WATER COMPANY | Water Revenue Adjustment Mechanism, net of Modified Cost Balancing Account |  |  |
Regulatory matters: |  |  |
Regulatory Asset Amount Billed to Customers as Surcharges | 6,405 | $ 96 |
Regulatory assets | 61,627 |  | 45,171
GOLDEN STATE WATER COMPANY | Costs deferred for future recovery on Aerojet case |  |  |
Regulatory matters: |  |  |
Regulatory assets | 12,375 |  | 12,699
GOLDEN STATE WATER COMPANY | Pension and other post-retirement obligations |  |  |
Regulatory matters: |  |  |
Regulatory assets | 25,215 |  | 21,996
GOLDEN STATE WATER COMPANY | Derivative unrealized loss |  |  |
Regulatory matters: |  |  |
Regulatory assets |  |  | 7,053
GOLDEN STATE WATER COMPANY | Flow-through taxes, net |  |  |
Regulatory matters: |  |  |
Regulatory assets | 16,923 |  | 16,176
GOLDEN STATE WATER COMPANY | Low income rate assistance balancing accounts |  |  |
Regulatory matters: |  |  |
Regulatory assets | 8,744 |  | 8,699
GOLDEN STATE WATER COMPANY | Other regulatory assets |  |  |
Regulatory matters: |  |  |
Regulatory assets | 26,264 |  | 25,668
GOLDEN STATE WATER COMPANY | Various refunds to customers |  |  |
Regulatory matters: |  |  |
Regulatory assets | $ (6,021) |  | $ (4,766)

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- Definition The net amount of all regulatory assets less all regulatory liabilities as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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