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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Income $ 11,670 $ 11,398
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:    
Depreciation and Amortization 8,349 7,767
Provision for Deferred Income Taxes and Investment Tax Credits 3,351 1,297
Equity Portion of Allowance for Funds Used During Construction (AFUDC) (242) (405)
Cash Surrender Value of Life Insurance (132) (42)
Stock Compensation Expense 456 315
Changes in Assets and Liabilities:    
Accounts Receivable 1,520 (578)
Unbilled Revenues (2,060) (1,567)
Materials & Supplies 571 187
Prepayments (640) (722)
Accounts Payable (1,464) (614)
Accrued Taxes 1,393 1,919
Accrued Interest (307) (703)
Employee Benefit Plans 182 (1,226)
Unearned Revenue & Advanced Service Fees 19 (113)
Other Assets and Liabilities (1,484) 158
NET CASH PROVIDED BY OPERATING ACTIVITIES 21,182 17,071
CASH FLOWS FROM INVESTING ACTIVITIES:    
Utility Plant Expenditures, Including AFUDC of $141 in 2012, $221 in 2011 (17,886) (17,647)
Restricted Cash (793) 2,504
Investment in Joint Venture (1,000)   
NET CASH USED IN INVESTING ACTIVITIES (19,679) (15,143)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Redemption of Long-term Debt (4,191) (3,818)
Proceeds from Issuance of Long-term Debt 4,929 2,747
Net Short-term Bank Borrowings 3,500 7,250
Deferred Debt Issuance Expense (22) (34)
Repurchase of Preferred Stock    (9)
Proceeds from Issuance of Common Stock 1,193 1,168
Payment of Common Dividends (8,720) (8,538)
Payment of Preferred Dividends (155) (155)
Construction Advances and Contributions-Net 655 1,142
NET CASH USED IN FINANCING ACTIVITIES (2,811) (247)
NET CHANGES IN CASH AND CASH EQUIVALENTS (1,308) 1,681
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 3,106 2,453
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 1,798 $ 4,134