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Revenue Recognition from Contracts with Customers (Schedule of Operating Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Regulated Tariff Sales        
Residential $ 25,108 $ 22,517 $ 65,767 $ 59,711
Commercial 7,167 4,903 16,796 12,587
Industrial 3,208 2,538 8,504 6,858
Fire Protection 3,248 3,171 9,541 9,436
Wholesale 5,644 3,822 13,905 11,079
Non-Regulated Contract Operations 3,321 2,888 8,986 9,336
Total Revenue from Contracts with Customers 47,696 39,839 123,499 109,007
Other Regulated Revenues 486 445 709 755
Other Non-Regulated Revenues 110 107 330 321
Inter-segment Elimination (560) (517) (927) (966)
Total Revenue $ 47,732 $ 39,874 $ 123,611 $ 109,117