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Regulatory Matters 3 (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Regulatory matters: |  |
Under (over) collection | $ 16,539 | $ (2,450)
Other Liabilities, Current | 10,437 | 10,341
GSWC |  |
Regulatory matters: |  |
Under (over) collection | 12,373 | (2,450)
Other Liabilities, Current | 9,403 | 9,745
Other Regulatory Assets | GSWC |  |
Regulatory matters: |  |
Under (over) collection | 10,670 | 23,662
Other Regulatory Assets | Bear Valley Electric Service, Inc. |  |
Regulatory matters: |  |
Under (over) collection | 2,629 | 0
Pension Costs and Other Postretirement Benefit Costs | GSWC |  |
Regulatory matters: |  |
Regulatory asset authorized under settlement | 66,600 |
Under (over) collection | 65,576 | $ 40,693
Under Collection in Two Way Pension Balancing Account [Member] | Pension Costs and Other Postretirement Benefit Costs | Bear Valley Electric Service, Inc. |  |
Regulatory matters: |  |
Under (over) collection | (206) |
Under Collection in Two Way Pension Balancing Account [Member] | Pension Costs and Other Postretirement Benefit Costs | Golden State Water Company and Bear Valley Electric Service, Inc. [Member] |  |
Regulatory matters: |  |
Under (over) collection | $ (1,000) |

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