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Regulatory Matters: (Tables) | 6 Months Ended
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Jun. 30, 2019
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) |  | June 30, 2019 |  | December 31, 2018
GSWC |  |  |  |
Water Revenue Adjustment Mechanism and Modified Cost Balancing Account |  | $ | 30,522 |  |  | $ | 17,763 |
Costs deferred for future recovery on Aerojet case |  | 9,166 |  |  | 9,516 |
Pensions and other post-retirement obligations (Note 8) |  | 32,444 |  |  | 33,124 |
Derivative unrealized loss (Note 5) |  | 267 |  |  | 311 |
Low income rate assistance balancing accounts |  | 1,787 |  |  | 2,784 |
General rate case memorandum accounts |  | 8,025 |  |  | 5,054 |
Excess deferred income taxes |  | (80,690 | ) |  | (81,465 | )
Flow-through taxes, net |  | (14,160 | ) |  | (15,273 | )
Other regulatory assets |  | 17,700 |  |  | 15,656 |
Tax Cuts and Jobs Act memorandum accounts |  | (8,987 | ) |  | (8,293 | )
Various refunds to customers |  | (9,358 | ) |  | (7,517 | )
Total |  | $ | (13,284 | ) |  | $ | (28,340 | )

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