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Revenue (Tables)
 12 Months Ended
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
We present our operating revenues from external customers, in total and by amounts arising from contracts with customers and ARP arrangements, disaggregated by revenue source and segment for the years ended December 31, 2022, 2021 and 2020:
(in thousands)202220212020
Operating Revenues
Electric Segment
Retail: Residential$143,888 $135,361 $127,260 
Retail: Commercial and Industrial318,494 262,408 254,951 
Retail: Other7,918 7,715 7,311 
  Total Retail470,300 405,484 389,522 
Transmission52,213 48,835 44,001 
Wholesale18,539 17,936 4,857 
Other8,647 8,066 7,708 
Total Electric Segment549,699 480,321 446,088 
Manufacturing Segment
Metal Parts and Tooling338,865 283,527 199,463 
Plastic Products and Tooling49,080 40,231 34,055 
Scrap Metal10,038 12,536 5,252 
Total Manufacturing Segment397,983 336,294 238,770 
Plastics Segment
PVC Pipe512,527 380,229 205,249 
Total Operating Revenue1,460,209 1,196,844 890,107 
Less: Noncontract Revenues Included Above— — 
Electric Segment - ARP Revenues(9,266)(791)6,936 
Total Operating Revenues from Contracts with Customers$1,469,475 $1,197,635 $883,171