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Balancing and Memorandum Account Recovery Procedures (Tables) | 3 Months Ended
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Mar. 31, 2018
Regulated Operations [Abstract] |
Public Utilities General Disclosures |
| Three months ended March 31, 2018 |  | Three months ended March 31, 2017
Beginning Balance |  | Regulatory Asset Increase (Decrease) |  | Refunds (Collections) |  | Surcharge Offset |  | Ending Balance |  | Beginning Balance |  | Regulatory Asset Increase (Decrease) |  | Refunds (Collections) |  | Surcharge Offset |  | Ending Balance
Revenue accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014-2016 WCMA | $ | 190 |  |  | 79 |  |  | 1 |  |  | — |  |  | 270 |  |  | $ | 1,589 |  |  | 1,448 |  |  | (1,232 | ) |  | (1,407 | ) |  | 398 |
2017 WCMA* | 6,489 |  |  | 296 |  |  | — |  |  | — |  |  | 6,785 |  |  | — |  |  | 2,060 |  |  | — |  |  | (2,060 | ) |  | — |
2018 WCMA | — |  |  | (708 | ) |  | — |  |  | — |  |  | (708 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
2012 General Rate Case true-up | 11,319 |  |  | — |  |  | 1 |  |  | — |  |  | 11,320 |  |  | 20,682 |  |  | — |  |  | (2,258 | ) |  | — |  |  | 18,424 |
2015 General Rate Case true-up | 115 |  |  | — |  |  | — |  |  | — |  |  | 115 |  |  | 5,528 |  |  | — |  |  | (1,431 | ) |  | — |  |  | 4,097 |
Cost of capital memorandum account | (144 | ) |  | (1,165 | ) |  | — |  |  | — |  |  | (1,309 | ) |  | (817 | ) |  | — |  |  | 358 |  |  | — |  |  | (459 | )
Tax memorandum account | — |  |  | (933 | ) |  | — |  |  | — |  |  | (933 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Drought surcharges | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (7,688 | ) |  | — |  |  | (833 | ) |  | 3,467 |  |  | (5,054 | )
Water supply costs | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 5,190 |  |  | 197 |  |  | 297 |  |  | — |  |  | 5,684 |
Pension | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2,009 | ) |  | 173 |  |  | (703 | ) |  | — |  |  | (2,539 | )
All others | 3,736 |  |  | 400 |  |  | — |  |  | — |  |  | 4,136 |  |  | 3,434 |  |  | 457 |  |  | (451 | ) |  | 76 |  |  | 3,516 |
Total revenue accounts: | $ | 21,705 |  |  | (2,031 | ) |  | 2 |  |  | — |  |  | 19,676 |  |  | $ | 25,909 |  |  | 4,335 |  |  | (6,253 | ) |  | 76 |  |  | 24,067 |
Cost-recovery accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Water supply costs | 8,679 |  |  | (482 | ) |  | — |  |  | — |  |  | 8,197 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Pension | (2,459 | ) |  | 161 |  |  | — |  |  | — |  |  | (2,298 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total cost-recovery accounts | $ | 6,220 |  |  | (321 | ) |  | — |  |  | — |  |  | 5,899 |  |  | $ | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 27,925 |  |  | (2,352 | ) |  | 2 |  |  | — |  |  | 25,575 |  |  | $ | 25,909 |  |  | 4,335 |  |  | (6,253 | ) |  | 76 |  |  | 24,067 |
* As of March 31, 2018 and 2017, the reserve balance for the 2017 WCMA was $1,022 and $0, which has been netted from the balance above.

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