Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING REVENUES:
Residential	$ 29,682	$ 29,079	$ 26,796
Commercial and industrial	13,822	13,267	12,299
Other	3,585	3,554	3,288
Operating revenues	47,089	45,900	42,383
OPERATING EXPENSES:
Operation and maintenance	8,066	7,968	7,350
Administrative and general	9,082	8,812	7,406
Depreciation and amortization	6,151	5,932	5,744
Taxes other than income taxes	1,129	1,111	1,122
Operating expenses	24,428	23,823	21,622
Operating income	22,661	22,077	20,761
OTHER INCOME (EXPENSES):
Interest on debt	(5,053)	(5,087)	(5,244)
Allowance for funds used during construction	206	210	82
Gain on sale of land	0	316	0
Other income (expenses), net	(585)	(1,155)	(133)
Other income (expenses)	(5,432)	(5,716)	(5,295)
Income before income taxes	17,229	16,361	15,466
Income taxes	4,740	4,877	5,812
Net Income	$ 12,489	$ 11,484	$ 9,654
Basic Earnings Per Share (in dollars per share)	$ 0.97	$ 0.89	$ 0.75
Cash Dividends Declared Per Share (in shares)	$ 0.6040	$ 0.5788	$ 0.5580