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Segment Information (Tables)
 3 Months Ended
Mar. 31, 2023
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information by Segment The following table presents financial information about our reportable segments:
Three Months Ended
March 31,
20232022
(in thousands)
Operating Revenues, Unaffiliated Customers
Regulated Energy$141,621 $124,058 
Unregulated Energy76,508 98,822 
Total operating revenues, unaffiliated customers$218,129 $222,880 
Intersegment Revenues (1)
Regulated Energy$649 $3,833 
Unregulated Energy6,657 1,996 
Other businesses45 606 
Total intersegment revenues$7,351 $6,435 
Operating Income
Regulated Energy$37,625 $34,681 
Unregulated Energy17,245 20,046 
Other businesses and eliminations45 138 
Operating income54,915 54,865 
Other income, net276 913 
Interest charges7,232 5,339 
Income Before Income Taxes47,959 50,439 
Income Taxes11,615 13,506 
Net Income$36,344 $36,933 
    
(1) All significant intersegment revenues are billed at market rates and have been eliminated from consolidated operating revenues.

(in thousands)March 31, 2023December 31, 2022
Identifiable Assets
Regulated Energy segment$1,713,149 $1,716,255 
Unregulated Energy segment 441,261 463,239 
Other businesses and eliminations43,141 35,543 
Total Identifiable Assets $2,197,551 $2,215,037