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Revenues (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of revenue | The following tables disaggregate revenues by major source, timing of revenue recognition, and segment:
|  | Year ended December 31, 2018
(in thousands) |  | Electric utility |  | Bank |  | Other |  | Total
Revenues from contracts with customers |  |  |  |  |  |  |  |
Electric energy sales - residential |  | $ | 801,846 |  |  | $ | — |  |  | $ | — |  |  | $ | 801,846 |
Electric energy sales - commercial |  | 853,672 |  |  | — |  |  | — |  |  | 853,672 |
Electric energy sales - large light and power |  | 894,770 |  |  | — |  |  | — |  |  | 894,770 |
Electric energy sales - other |  | 17,243 |  |  | — |  |  | — |  |  | 17,243 |
Bank fees |  | — |  |  | 47,300 |  |  | — |  |  | 47,300 |
Total revenues from contracts with customers |  | 2,567,531 |  |  | 47,300 |  |  | — |  |  | 2,614,831 |
Revenues from other sources |  |  |  |  |  |  |  |
Regulatory revenue |  | (37,687 | ) |  | — |  |  | — |  |  | (37,687 | )
Bank interest and dividend income |  | — |  |  | 258,225 |  |  | — |  |  | 258,225 |
Other bank noninterest income |  | — |  |  | 8,750 |  |  | — |  |  | 8,750 |
Other |  | 16,681 |  |  | — |  |  | 49 |  |  | 16,730 |
Total revenues from other sources |  | (21,006 | ) |  | 266,975 |  |  | 49 |  |  | 246,018 |
Total revenues |  | $ | 2,546,525 |  |  | $ | 314,275 |  |  | $ | 49 |  |  | $ | 2,860,849 |
Timing of revenue recognition |  |  |  |  |  |  |  |
Services/goods transferred at a point in time |  | $ | — |  |  | $ | 47,300 |  |  | $ | — |  |  | $ | 47,300 |
Services/goods transferred over time |  | 2,567,531 |  |  | — |  |  | — |  |  | 2,567,531 |
Total revenues from contracts with customers |  | $ | 2,567,531 |  |  | $ | 47,300 |  |  | $ | — |  |  | $ | 2,614,831 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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