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Regulatory Matters 3 (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Regulatory matters: |  |
Regulatory asset authorized under settlement | $ 2,700 |
Other Liabilities, Current | 10,341 | $ 10,731
GSWC |  |
Regulatory matters: |  |
Under (over) collection | (2,450) | (28,340)
Other Liabilities, Current | 9,745 | 9,432
Other Regulatory Assets Net [Member] | GSWC |  |
Regulatory matters: |  |
Under (over) collection | 18,842 | 18,440
Pension Costs and Other Postretirement Benefit Costs | GSWC |  |
Regulatory matters: |  |
Regulatory asset authorized under settlement | 43,400 |
Under (over) collection | 40,693 | $ 33,124
Two-way pension balancing account | Water Service Utility Operations [Member] | Pension Costs and Other Postretirement Benefit Costs | GSWC |  |
Regulatory matters: |  |
Regulatory asset authorized under settlement | (1,500) |
Two-way pension balancing account | Electric: | Pension Costs and Other Postretirement Benefit Costs | GSWC |  |
Regulatory matters: |  |
Regulatory asset authorized under settlement | $ (1,200) |

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