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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2020
Regulated Operations [Abstract] |
Schedule of regulatory assets, less regulatory liabilities in the consolidated balance sheets for continuing operations | :
|  | December 31,
(dollars in thousands) |  | 2020 |  | 2019
GSWC |  |  |  |
Water Revenue Adjustment Mechanism, net of the Modified Cost Balancing Account |  | $ | 13,741 |  |  | $ | 22,535 |
Costs deferred for future recovery on Aerojet case |  | 6,751 |  |  | 8,292 |
Pensions and other post-retirement obligations (Note 12) |  | 65,576 |  |  | 40,693 |
Derivative unrealized loss (Note 5) |  | — |  |  | 3,171 |
COVID-19 memorandum account |  | 4,119 |  |  | — |
Other regulatory assets |  | 10,670 |  |  | 23,662 |
Excess deferred income taxes (Note 11) |  | (74,185) |  |  | (79,886) |
Flow-through taxes, net (Note 11) |  | (9,722) |  |  | (12,439) |
Various refunds to customers |  | (4,577) |  |  | (8,478) |
Total GSWC |  | $ | 12,373 |  |  | $ | (2,450) |
BVESI |  |  |  |
Derivative unrealized loss (Note 5) |  | 1,537 |  |  | — |
Other regulatory assets |  | 2,629 |  |  | — |
Total AWR |  | $ | 16,539 |  |  | $ | (2,450) |

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