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v3.19.3.a.u2

Regulatory Matters 2 (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2005 | Jul. 31, 2005 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Regulatory matters: |  |  |  |  |
Regulatory Asset Not Accruing Carrying Costs |  |  | $ 43,100 |  |
Water |  |  | 319,830 | $ 295,258 | $ 306,332
Regulatory Assets |  |  | 2,700 |  |
Pension Costs and Other Postretirement Benefit Costs |  |  |  |  |
Regulatory matters: |  |  |  |  |
Regulatory Asset Not Accruing Carrying Costs |  |  | 43,400 |  |
WRAM |  |  |  |  |
Regulatory matters: |  |  |  |  |
Regulatory adjustment |  |  | $ 16,300 |  |
Cost of Capital, Proceeding for Water Regions [Member] |  |  |  |  |
Regulatory matters: |  |  |  |  |
Weighted Cost of Capital Percent |  |  | 8.34% |  |
GSWC |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | $ 2,450 | 28,340 |
Water |  |  | 319,830 | 295,258 | $ 306,332
GSWC | Deferred Income Tax Charge [Member] |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | 79,886 | 81,465 |
GSWC | Pension Costs and Other Postretirement Benefit Costs |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | (40,693) | (33,124) |
Regulatory Assets |  |  | 43,400 |  |
GSWC | Costs deferred for future recovery on Aerojet case |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | (8,292) | (9,516) |
Recovery period |  | 20 years |  |  |
Increase in Revenue Requirement, Recoverable through Surcharges |  | $ 21,300 |  |  |
GSWC | Costs deferred for future recovery on Aerojet case | Maximum |  |  |  |  |
Regulatory matters: |  |  |  |  |
Recovery period | 20 years |  |  |  |
GSWC | Gain (Loss) on Derivative Instruments [Member] |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | (3,171) | (311) |
GSWC | Flow-through taxes, net |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | 12,439 | 15,273 |
GSWC | General Rate Case Memorandum Accounts [Member] |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | $ (4,820) | (5,054) |
GSWC | General Rate Case Memorandum Accounts [Member] | Minimum |  |  |  |  |
Regulatory matters: |  |  |  |  |
Recovery period |  |  | 12 months |  |
GSWC | General Rate Case Memorandum Accounts [Member] | Maximum |  |  |  |  |
Regulatory matters: |  |  |  |  |
Recovery period |  |  | 36 months |  |
GSWC | WRAM, net of MCBA |  |  |  |  |
Regulatory matters: |  |  |  |  |
Commercial paper, term |  |  | 90 days |  |
Amount billed to customers as surcharges |  |  | $ 11,600 |  |
Under (over) collection |  |  | $ (22,535) | (17,763) |
GSWC | WRAM, net of MCBA | Maximum |  |  |  |  |
Regulatory matters: |  |  |  |  |
Recovery period |  |  | 24 months |  |
GSWC | WRAM |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | $ (11,000) |  |
GSWC | Modified Cost Balancing Account |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | $ (11,500) |  |
GSWC | Cost of Capital, Proceeding for Water Regions [Member] |  |  |  |  |
Regulatory matters: |  |  |  |  |
Weighted Cost of Capital Percent |  |  | 7.91% |  |
Revenue Subject to Refund for TCJA [Member] | GSWC |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | $ 0 | 8,293 |
Various refunds to customers | GSWC |  |  |  |  |
Regulatory matters: |  |  |  |  |
Under (over) collection |  |  | 8,478 | $ 7,517 |
Under Collection in Two Way Pension Balancing Account [Member] | GSWC | Pension Costs and Other Postretirement Benefit Costs |  |  |  |  |
Regulatory matters: |  |  |  |  |
Regulatory adjustment |  |  | $ (2,700) |  |

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