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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 7,362 $ 6,754
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 6,553 6,164
Deferred income taxes, net 2,095 2,398
Stock compensation 101 89
AFUDC, equity portion (196) (158)
Changes in assets and liabilities:    
Accounts receivable, net of allowance for doubtful accounts 71 (144)
Unbilled operating revenues (412) 20
Materials and supplies (275) (251)
Prepaid property taxes (615) (724)
Prepaid expenses and other 75 (126)
Other deferred assets (138) (133)
Regulatory assets (94) 25
Accounts payable (230) 194
Accrued expenses 2,171 1,230
Accrued interest 531 113
Customer deposits and other, net (33) (393)
Postretirement benefit obligation      
NET CASH USED IN OPERATING ACTIVITIES 16,966 15,058
CASH FLOWS USED IN INVESTING ACTIVITIES    
Capital expenditures (net of AFUDC, equity portion) (19,257) (13,936)
Proceeds from sale of assets 27 14
NET CASH USED IN INVESTING ACTIVITIES (19,230) (13,922)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net borrowings (repayments) under lines of credit agreements 4,104 (1,043)
Decrease in overdraft payable (60) (670)
Net advances and contributions in aid of construction 2,361 4,663
Change in deferred debt issuance costs 90 90
Net proceeds from issuance of common stock 1,399 1,681
Dividends paid (5,609) (5,372)
Issuance of long-term debt 689 385
Principal repayments of long-term debt (929) (910)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES 2,045 (1,176)
NET DECREASE IN CASH AND CASH EQUIVALENTS (219) (40)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 422 617
CASH AND CASH EQUIVALENTS AT END OF PERIOD 203 577
Supplemental Disclosures of Cash Flow Information:    
Utility plant received as construction advances and contributions 463 758
Interest paid 5,085 5,180
Income taxes paid $ 1,615 $ 1,749