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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 2,505 $ 1,009
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,960 1,810
Deferred income taxes, net 750 330
Stock compensation 29 31
AFUDC, equity portion (22) (21)
Changes in assets and liabilities:    
Accounts receivable, net of allowance for doubtful accounts 1,861 (34)
Unbilled operating revenues (474) 573
Materials and supplies 49 (18)
Prepaid property taxes 642 610
Prepaid expenses and other 237 1,267
Other deferred assets (240) (254)
Regulatory assets 67 (12)
Accounts payable (120) 192
Accrued expenses 360 (359)
Accrued interest 180 155
Customer deposits and other, net (202) 359
Postretirement benefit obligation 0 (54)
NET CASH PROVIDED BY OPERATING ACTIVITIES 7,582 5,584
CASH FLOWS USED IN INVESTING ACTIVITIES    
Capital expenditures (net of AFUDC, equity portion) (3,597) (2,587)
Proceeds from sale of assets 11 12
NET CASH USED IN INVESTING ACTIVITIES (3,586) (2,575)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net repayments under lines of credit agreements (2,662) (3,765)
Increase (decrease) in overdraft payable 154 (137)
Net advances and contributions in aid of construction 72 4
Change in deferred debt issuance costs 29 49
Net proceeds from issuance of common stock 506 463
Dividends paid (1,663) (1,445)
Issuance of long-term debt 0 2,830
Principal repayments of long-term debt (290) (864)
NET CASH USED IN FINANCING ACTIVITIES (3,854) (2,865)
NET (DECREASE)INCREASE IN CASH AND CASH EQUIVALENTS 142 144
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 311 179
CASH AND CASH EQUIVALENTS AT END OF PERIOD 453 323
Supplemental Disclosures of Cash Flow Information:    
Utility plant received as construction advances and contributions 12 382
Interest paid 1,592 1,687
Income taxes paid $ 0 $ 0