Revenue Recognition from Contracts with Customers (Schedule of Operating Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Regulated Tariff Sales
Residential	$ 19,152	$ 16,957
Commercial	4,427	3,576
Industrial	2,595	2,177
Fire Protection	3,120	3,104
Wholesale	3,964	3,539
Non-Regulated Contract Operations	2,900	3,151
Total Revenue from Contracts with Customers	36,158	32,504
Other Regulated Revenues	67	68
Other Non-Regulated Revenues	109	106
Inter-segment Elimination	(138)	(137)
Total Revenue	$ 36,196	$ 32,541