CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Statement [Abstract]
Operating Revenues	$ 69,402	$ 66,408	$ 59,391
Operating Expenses
Operation and Maintenance	32,662	33,105	32,181
Depreciation	7,773	7,088	6,403
Income Taxes	6,966	5,323	2,466
Taxes Other Than Income Taxes	6,441	6,271	5,953
Organizational Review Charge	0	786	0
Total Operating Expenses	53,842	52,573	47,003
Net Operating Revenues	15,560	13,835	12,388
Other Utility Income, Net of Taxes	847	742	704
Total Utility Operating Income	16,407	14,577	13,092
Other Income (Deductions), Net of Taxes
Gain (Loss) on Real Estate Transactions	176	230	1,449
Non-Water Sales Earnings	1,001	899	929
Allowance for Funds Used During Construction	188	171	267
Other	(798)	(226)	(784)
Total Other Income (Deductions), Net of Taxes	567	1,074	1,861
Interest and Debt Expense
Interest on Long-Term Debt	4,602	4,628	3,937
Other Interest Charges	651	784	393
Amortization of Debt Expense	421	441	414
Total Interest and Debt Expenses	5,674	5,853	4,744
Net Income	11,300	9,798	10,209
Preferred Stock Dividend Requirement	38	38	38
Net Income Applicable to Common Stock	$ 11,262	$ 9,760	$ 10,171
Weighted Average Common Shares Outstanding:
Basic (in shares)	8,610	8,532	8,448
Diluted (in shares)	8,720	8,633	8,523
Earnings Per Common Share:
Basic (in dollars per share)	$ 1.31	$ 1.14	$ 1.20
Diluted (in dollars per share)	$ 1.29	$ 1.13	$ 1.19