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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 8,099 $ 5,000
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 5,880 5,530
Deferred income taxes, net 2,898 3,447
Stock compensation 83 91
AFUDC, equity portion (161) (85)
Changes in assets and liabilities:    
Accounts receivable, net of allowance for doubtful accounts (599) 280
Unbilled operating revenues 739 (259)
Materials and supplies 154 (244)
Prepaid property taxes (703) (682)
Prepaid expenses and other 122 1,319
Other deferred assets (257) (264)
Regulatory assets 195 358
Accounts payable 701 (660)
Accrued expenses 1,056 481
Accrued interest 59 163
Customer deposits and other, net 7 (361)
Postretirement benefit obligation 0 (159)
NET CASH PROVIDED BY OPERATING ACTIVITIES 18,273 13,955
CASH FLOWS USED IN INVESTING ACTIVITIES    
Capital expenditures (net of AFUDC, equity portion) (14,787) (10,785)
Proceeds from sale of assets 25 47
NET CASH USED IN INVESTING ACTIVITIES (14,762) (10,738)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net repayments under lines of credit agreements (1,191) (16,876)
Increase (decrease) in overdraft payable 423 (129)
Net advances and contributions in aid of construction 2,376 500
Change in deferred debt issuance costs 90 43
Net proceeds from issuance of common stock 1,496 16,740
Dividends paid (5,086) (4,532)
Issuance of long-term debt 0 2,892
Principal repayments of long-term debt (1,418) (1,827)
NET CASH USED IN FINANCING ACTIVITIES (3,310) (3,189)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 201 28
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 311 179
CASH AND CASH EQUIVALENTS AT END OF PERIOD 512 207
Supplemental Disclosures of Cash Flow Information:    
Utility plant received as construction advances and contributions 1,456 614
Interest paid 5,221 5,337
Income taxes paid $ 971 $ 0