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Regulatory Matters: Alternative-Revenue Programs (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Regulatory matters: |  |  |  |  |  |
Regulated Operating Revenue, Water | $ 91,919 | $ 90,617 | $ 239,057 | $ 237,987 |  |
WRAM, net of MCBA |  |  |  |  |  |
Regulatory matters: |  |  |  |  |  |
Increase (decrease) in other regulatory assets |  |  | $ 19,500 |  |  |
Regulatory Asset Recovery Periods |  |  | 24 months |  |  |
GOLDEN STATE WATER COMPANY |  |  |  |  |  |
Regulatory matters: |  |  |  |  |  |
Under (over) collection | 130,906 |  | $ 130,906 |  | $ 146,281 |
Regulated Operating Revenue, Water | 91,919 | 90,617 | $ 239,057 | 237,987 |  |
GOLDEN STATE WATER COMPANY | WRAM, net of MCBA |  |  |  |  |  |
Regulatory matters: |  |  |  |  |  |
Commercial paper, term |  |  | 90 days |  |  |
Amount billed to customers as surcharges | 11,400 | $ 6,500 | $ 24,800 | $ 12,900 |  |
Under (over) collection | 40,230 |  | $ 40,230 |  | $ 47,340 |
GOLDEN STATE WATER COMPANY | WRAM, net of MCBA | Maximum |  |  |  |  |  |
Regulatory matters: |  |  |  |  |  |
Regulatory Asset Recovery Periods |  |  | 24 months |  |  |
Alternative Revenue Program |  |  |  |  | 24 months | 24 months
GOLDEN STATE WATER COMPANY | WRAM |  |  |  |  |  |
Regulatory matters: |  |  |  |  |  |
Under (over) collection | 20,000 |  | $ 20,000 |  |  |
Deferred Revenue | 450 |  | 450 |  | $ 910 | $ 1,400
GOLDEN STATE WATER COMPANY | Modified Cost Balancing Account |  |  |  |  |  |
Regulatory matters: |  |  |  |  |  |
Under (over) collection | $ 20,200 |  | $ 20,200 |  |  |

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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 + Details
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- Definition The increase (decrease) during the reporting period in the value of other assets that are created when regulatory agencies permits public utilities to defer costs to the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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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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