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Regulatory Matters: (Tables) | 3 Months Ended
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Mar. 31, 2017
Regulated Operations [Abstract] |
Schedule of regulatory assets, less regulatory liabilities in the consolidated balance sheets for continuing operations | Regulatory assets, less regulatory liabilities, included in the consolidated balance sheets are as follows:
(dollars in thousands) |  | March 31, 2017 |  | December 31, 2016
GSWC |  |  |  |
Water Revenue Adjustment Mechanism, net of Modified Cost Balancing Account |  | $ | 55,298 |  |  | $ | 47,340 |
Costs deferred for future recovery on Aerojet case |  | 11,705 |  |  | 11,820 |
Pensions and other post-retirement obligations (Note 7) |  | 27,452 |  |  | 28,118 |
Derivative unrealized loss (Note 4) |  | 5,460 |  |  | 4,901 |
Flow-through taxes, net (Note 6) |  | 20,708 |  |  | 20,134 |
Low income rate assistance balancing accounts |  | 8,502 |  |  | 8,272 |
General rate case memorandum accounts |  | 14,689 |  |  | 13,929 |
Other regulatory assets |  | 17,477 |  |  | 17,633 |
Various refunds to customers |  | (5,304 | ) |  | (5,866 | )
Total |  | $ | 155,987 |  |  | $ | 146,281 |

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