CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Operating Revenues	$ 27,173	$ 27,038
Operating Expenses:
Operations and Maintenance	15,437	15,430
Depreciation	2,815	2,709
Other Taxes	2,954	3,034
Total Operating Expenses	21,206	21,173
Operating Income	5,967	5,865
Other Income (Expense):
Allowance for Funds Used During Construction	67	38
Other Income	11	97
Other Expense	(20)	(10)
Total Other Income, net	58	125
Interest Charges	1,103	1,155
Income before Income Taxes	4,922	4,835
Income Taxes	1,753	1,658
Net Income	3,169	3,177
Preferred Stock Dividend Requirements	43	52
Earnings Applicable to Common Stock	$ 3,126	$ 3,125
Earnings per share of Common Stock:
Basic (in dollars per share)	$ 0.20	$ 0.20
Diluted (in dollars per share)	$ 0.20	$ 0.20
Average Number of Common Shares Outstanding :
Basic (in shares)	15,974,000	15,806,000
Diluted (in shares)	16,178,000	16,069,000
Cash Dividends Paid per Common Share (in dollars per share)	$ 0.1900	$ 0.1875