Revenue Recognition from Contracts with Customers (Schedule of Operating Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Regulated Tariff Sales
Residential	$ 21,508	$ 20,238	$ 40,659	$ 37,195
Commercial	5,203	4,108	9,630	7,684
Industrial	2,700	2,143	5,295	4,320
Fire Protection	3,173	3,161	6,294	6,265
Wholesale	4,297	3,718	8,260	7,256
Non-Regulated Contract Operations	2,765	3,298	5,665	6,449
Total Revenue from Contracts with Customers	39,646	36,666	75,803	69,169
Other Regulated Revenues	156	241	223	310
Other Non-Regulated Revenues	110	107	220	213
Inter-segment Elimination	(229)	(313)	(367)	(450)
Total Revenue	$ 39,683	$ 36,701	$ 75,879	$ 69,242