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Organization, Summary of Significant Accounting Policies and Recent Developments (Tables) | 12 Months Ended
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Dec. 31, 2019
Organization Summary Of Significant Accounting Policies And Recent Developments [Abstract] |
Range of depreciation rates |
Source of Supply | 1.15% - 3.44% | Transmission and Distribution (T&D):
Pumping | 2.00% - 5.39% | T&D – Mains | 1.10% - 3.13%
Water Treatment | 1.65% - 7.09% | T&D – Services | 2.12% - 3.16%
General Plant | 2.08% - 17.84% | T&D – Other | 1.61% - 4.63%
Wastewater Collection | 1.42% - 1.81% |  |
Allowance for Funds Used During Construction Rates |
| 2019 | 2018 | 2017
Middlesex | 6.50% | 6.50% | 6.73%
Tidewater | 7.92% | 7.92% | 7.92%
Schedule of Operating Revenues |
|  | (In Thousands)
|  | Years Ended December 31,
|  | 2019 |  | 2018 |  | 2017
Regulated Tariff Sales |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 71,487 |  |  | $ | 69,785 |  |  | $ | 66,483 |
Commercial |  |  | 15,198 |  |  |  | 14,844 |  |  |  | 13,956 |
Industrial |  |  | 9,390 |  |  |  | 10,183 |  |  |  | 9,321 |
Fire Protection |  |  | 12,291 |  |  |  | 12,099 |  |  |  | 11,812 |
Wholesale |  |  | 14,319 |  |  |  | 14,655 |  |  |  | 13,553 |
Non-Regulated Contract Operations |  |  | 11,773 |  |  |  | 16,374 |  |  |  | 15,508 |
Total Revenue from Contracts with Customers |  | $ | 134,458 |  |  | $ | 137,940 |  |  | $ | 130,633 |
Other Regulated Revenues |  |  | 393 |  |  |  | 335 |  |  |  | 329 |
Other Non-Regulated Revenues |  |  | 404 |  |  |  | 404 |  |  |  | 404 |
Inter-segment Elimination |  |  | (657 | ) |  |  | (602 | ) |  |  | (591 | )
Total Revenue |  | $ | 134,598 |  |  | $ | 138,077 |  |  | $ | 130,775 |

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