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Segment Information
 9 Months Ended
Sep. 30, 2021
Segment Reporting [Abstract]  
Segment Information Segment Information
We classify our business into three segments, Electric, Manufacturing and Plastics, consistent with our business strategy, organizational structure and our internal reporting and review processes used by our chief operating decision maker to make decisions regarding allocation of resources, to assess operating performance and to make strategic decisions.
Certain assets and costs are not allocated to our operating segments. Corporate operating costs include items such as corporate staff and overhead costs, the results of our captive insurance company and other items excluded from the measurement of operating segment performance. Corporate assets consist primarily of cash, prepaid expenses, investments and fixed assets. Corporate is not an operating segment, rather it is added to operating segment totals to reconcile to consolidated amounts.
Information for each segment and our unallocated corporate costs for the three and nine months ended September 30, 2021 and 2020 are as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(in thousands)2021202020212020
Operating Revenue1
Electric$118,775 $115,213 $348,629 $333,213 
Manufacturing89,977 59,849 250,085 174,276 
Plastics107,542 60,693 264,898 155,769 
Total$316,294 $235,755 $863,612 $663,258 
Net Income (Loss)
Electric$22,528 $24,737 $55,547 $54,225 
Manufacturing4,200 3,311 15,290 8,476 
Plastics28,410 10,343 60,102 20,922 
Corporate(2,384)(2,457)(5,787)(6,440)
Total$52,754 $35,934 $125,152 $77,183 
1Amounts reflect operating revenues to external customers. Intersegment operating revenues are not material for any period presented.
The following provides the identifiable assets by segment and corporate assets as of September 30, 2021 and December 31, 2020:
(in thousands)September 30,
2021		December 31,
2020
Identifiable Assets
Electric$2,271,636 $2,233,399 
Manufacturing242,414 191,005 
Plastics143,615 99,767 
Corporate55,483 54,183 
Total$2,713,148 $2,578,354