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v3.21.1

Segment Information - Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Total Operating Revenues | $ 261,710 | $ 234,747 |
Net Income (Loss) | 30,329 | 24,268 |
Identifiable Assets | 2,618,540 |  | $ 2,578,354
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) | (1,790) | (2,290) |
Identifiable Assets | 55,889 |  | 54,183
Electric | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Operating Revenues | 123,699 | 119,870 |
Net Income (Loss) | 17,587 | 16,182 |
Identifiable Assets | 2,242,026 |  | 2,233,399
Manufacturing | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Operating Revenues | 75,825 | 68,479 |
Net Income (Loss) | 5,385 | 4,927 |
Identifiable Assets | 209,477 |  | 191,005
Plastics | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Operating Revenues | 62,186 | 46,398 |
Net Income (Loss) | 9,147 | $ 5,449 |
Identifiable Assets | $ 111,148 |  | $ 99,767

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