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Revenue Recognition from Contracts with Customers (Tables)
3 Months Ended
Mar. 31, 2023
Revenue from Contract with Customer [Abstract]  
Schedule of Operating Revenue
   (In Thousands)
   Three Months Ended March 31,
   2023  2022
Regulated Tariff Sales          
Residential  $19,004   $19,152 
Commercial   5,379    4,427 
Industrial   2,839    2,595 
Fire Protection   3,104    3,120 
Wholesale   4,553    3,964 
Non-Regulated Contract Operations   3,229    2,900 
Total Revenue from Contracts with Customers  $38,108   $36,158 
Other Regulated Revenues   74    67 
Other Non-Regulated Revenues   113    109 
Inter-segment Elimination   (139)   (138)
Total Revenue  $38,156   $36,196