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Revenue
 3 Months Ended
Mar. 31, 2022
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
We present our operating revenues to external customers, in total and by amounts arising from contracts with customers and alternative revenue program (ARP) arrangements, disaggregated by revenue source and segment for the three months ended March 31, 2022 and 2021:
Three Months Ended March 31,
(in thousands)20222021
Operating Revenues
Electric Segment
Retail: Residential$40,561 $37,485 
Retail: Commercial and Industrial71,171 66,403 
Retail: Other1,907 1,818 
  Total Retail113,639 105,706 
Transmission12,556 11,944 
Wholesale2,463 4,507 
Other1,758 1,542 
Total Electric Segment130,416 123,699 
Manufacturing Segment
Metal Parts and Tooling89,573 62,673 
Plastic Products and Tooling12,445 10,295 
Scrap Metal Sales2,939 2,857 
Total Manufacturing Segment104,957 75,825 
Plastics Segment
PVC Pipe139,531 62,186 
Total Operating Revenue374,904 261,710 
Less: Non-contract Revenues Included Above
Electric Segment - ARP Revenues(2,460)(975)
Total Operating Revenues from Contracts with Customers$377,364 $262,685