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Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | $ 1,196,844 | $ 890,107 | $ 919,503
Total Operating Revenues from Contracts with Customers | 1,197,635 | 883,171 | 918,471
Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 480,321 | 446,088 | 459,048
Electric Segment - ARP Revenues | (791) | 6,936 | 1,032
Manufacturing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 336,294 | 238,770 | 277,204
Plastics |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 380,229 | 205,249 | 183,251
Retail: Residential | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 135,361 | 127,260 | 131,988
Retail: Commercial and Industrial | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 262,408 | 254,951 | 267,125
Retail: Other | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 7,715 | 7,311 | 7,365
Total Retail | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 405,484 | 389,522 | 406,478
Transmission | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 48,835 | 44,001 | 40,542
Wholesale | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 17,936 | 4,857 | 5,007
Other | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 8,066 | 7,708 | 7,021
Metal Parts and Tooling | Manufacturing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 283,527 | 199,463 | 236,032
Plastic Products and Tooling | Manufacturing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 40,231 | 34,055 | 35,173
Other | Manufacturing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 12,536 | 5,252 | 5,999
Operating Segments | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 480,321 | 446,088 | 459,048
Operating Segments | Manufacturing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | 336,294 | 238,770 | 277,204
Operating Segments | Plastics |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Operating Revenues | $ 380,229 | $ 205,249 | $ 183,251

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