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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Statement [Abstract]
Operating Revenues	$ 23,546	$ 23,996
Operating Expenses:
Operations and Maintenance	14,375	14,031
Depreciation	2,548	2,412
Other Taxes	2,746	2,785
Total Operating Expenses	19,669	19,228
Operating Income	3,877	4,768
Other Income (Expense):
Allowance for Funds Used During Construction	136	194
Other Income	192	157
Other Expense	(140)	(49)
Total Other Income, net	188	302
Interest Charges	1,354	1,214
Income before Income Taxes	2,711	3,856
Income Taxes	904	1,226
Net Income	1,807	2,630
Preferred Stock Dividend Requirements	52	52
Earnings Applicable to Common Stock	$ 1,755	$ 2,578
Earnings per share of Common Stock:
Basic	$ 0.11	$ 0.17
Diluted	$ 0.11	$ 0.17
Average Number of Common Shares Outstanding:
Basic	15,692	15,576
Diluted	15,955	15,839
Cash Dividends Paid per Common Share	$ 0.185	$ 0.1825

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