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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2022
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following tables depict the disaggregation of revenue, including intercompany revenue, from contracts with customers by customer type and timing of revenue recognition for each of the reportable segments, for the years ended December 31, 2022, 2021 and 2020. Sales tax and other similar taxes are excluded from revenues.
Year ended December 31, 2022 |  | Electric Utilities |  |  | Gas Utilities |  |  | Inter-company Revenues |  |  | Total |
Customer types: |  | (in thousands) |
Retail |  | $ | 739,734 |  |  | $ | 1,453,266 |  |  | $ | — |  |  | $ | 2,193,000 |
Transportation |  |  | — |  |  |  | 173,275 |  |  |  | (413 | ) |  |  | 172,862 |
Wholesale |  |  | 44,832 |  |  |  | — |  |  |  | — |  |  |  | 44,832 |
Market - off-system sales |  |  | 48,578 |  |  |  | 829 |  |  |  | — |  |  |  | 49,407 |
Transmission/Other |  |  | 61,470 |  |  |  | 37,879 |  |  |  | (16,594 | ) |  |  | 82,755 |
Revenue from contracts with customers |  |  | 894,614 |  |  |  | 1,665,249 |  |  |  | (17,007 | ) |  |  | 2,542,856 |
Other revenues |  |  | 5,548 |  |  |  | 3,841 |  |  |  | (429 | ) |  |  | 8,960 |
Total revenues |  | $ | 900,162 |  |  | $ | 1,669,090 |  |  | $ | (17,436 | ) |  | $ | 2,551,816 |
Timing of revenue recognition: |  |  |  |  |  |  |  |  |  |  |  |
Services transferred at a point in time |  | $ | 30,454 |  |  | $ | — |  |  | $ | — |  |  | $ | 30,454 |
Services transferred over time |  |  | 864,160 |  |  |  | 1,665,249 |  |  |  | (17,007 | ) |  |  | 2,512,402 |
Revenue from contracts with customers |  | $ | 894,614 |  |  | $ | 1,665,249 |  |  | $ | (17,007 | ) |  | $ | 2,542,856 |
Year ended December 31, 2021 |  | Electric Utilities |  |  | Gas Utilities |  |  | Inter-company Revenues |  |  | Total |
Customer types: |  | (in thousands) |
Retail |  | $ | 711,448 |  |  | $ | 913,725 |  |  | $ | — |  |  | $ | 1,625,173 |
Transportation |  |  | — |  |  |  | 158,053 |  |  |  | (428 | ) |  |  | 157,625 |
Wholesale |  |  | 30,848 |  |  |  | — |  |  |  | — |  |  |  | 30,848 |
Market - off-system sales |  |  | 41,682 |  |  |  | 396 |  |  |  | — |  |  |  | 42,078 |
Transmission/Other |  |  | 52,945 |  |  |  | 39,365 |  |  |  | (17,200 | ) |  |  | 75,110 |
Revenue from contracts with customers |  |  | 836,923 |  |  |  | 1,111,539 |  |  |  | (17,628 | ) |  |  | 1,930,834 |
Other revenues |  |  | 5,335 |  |  |  | 13,326 |  |  |  | (393 | ) |  |  | 18,268 |
Total revenues |  | $ | 842,258 |  |  | $ | 1,124,865 |  |  | $ | (18,021 | ) |  | $ | 1,949,102 |
Timing of revenue recognition: |  |  |  |  |  |  |  |  |  |  |  |
Services transferred at a point in time |  | $ | 27,141 |  |  | $ | — |  |  | $ | — |  |  | $ | 27,141 |
Services transferred over time |  |  | 809,782 |  |  |  | 1,111,539 |  |  |  | (17,628 | ) |  |  | 1,903,693 |
Revenue from contracts with customers |  | $ | 836,923 |  |  | $ | 1,111,539 |  |  | $ | (17,628 | ) |  | $ | 1,930,834 |
Year ended December 31, 2020 | Electric Utilities |  | Gas Utilities |  | Inter-company Revenues |  | Total |
Customer types: | (in thousands) |
Retail | $ | 636,902 |  | $ | 765,922 |  | $ | — |  | $ | 1,402,824 |
Transportation |  | — |  |  | 154,581 |  |  | (526 | ) |  | 154,055 |
Wholesale |  | 24,845 |  |  | — |  |  | — |  |  | 24,845 |
Market - off-system sales |  | 15,512 |  |  | 260 |  |  | — |  |  | 15,772 |
Transmission/Other |  | 55,422 |  |  | 43,658 |  |  | (15,772 | ) |  | 83,308 |
Revenue from contracts with customers |  | 732,681 |  |  | 964,421 |  |  | (16,298 | ) |  | 1,680,804 |
Other revenues |  | 6,176 |  |  | 10,249 |  |  | (288 | ) |  | 16,137 |
Total revenues | $ | 738,857 |  | $ | 974,670 |  | $ | (16,586 | ) | $ | 1,696,941 |
Timing of revenue recognition: |  |  |  |  |  |  |  |
Services transferred at a point in time | $ | 27,089 |  | $ | — |  | $ | — |  | $ | 27,089 |
Services transferred over time |  | 705,592 |  |  | 964,421 |  |  | (16,298 | ) |  | 1,653,715 |
Revenue from contracts with customers | $ | 732,681 |  | $ | 964,421 |  | $ | (16,298 | ) | $ | 1,680,804 |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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