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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net Income $ 22,809 $ 22,742 $ 20,028
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:      
Depreciation and Amortization 14,846 13,532 13,087
Provision for Deferred Income Taxes 7,944 3,553 15,753
Equity Portion of Allowance For Funds Used During Construction (AFUDC) (481) (423) (228)
Cash Surrender Value of Life Insurance (209) (101) (76)
Stock Compensation Expense 840 829 633
Adoption of Repairs on Tangible Property Regulations Net 2,680
Changes in Assets and Liabilities:      
Accounts Receivable (656) (69) (48)
Unbilled Revenues (409) (344) (309)
Materials & Supplies (24) (1,494) (347)
Prepayments (384) 11 (46)
Accounts Payable 1,586 5,818 171
Accrued Taxes (967) 3,259 178
Accrued Interest 9 (20) (30)
Employee Benefit Plans (1,920) (1,601) (129)
Unearned Revenue & Advanced Service Fees 28 43 41
Other Assets and Liabilities (169) 1,336 (146)
NET CASH PROVIDED BY OPERATING ACTIVITIES 42,843 47,071 51,212
CASH FLOWS FROM INVESTING ACTIVITIES:      
Utility Plant Expenditures, Including AFUDC of $221 in 2017, $196 in 2016 and $152 in 2015 (50,301) (47,375) (25,773)
(Receipt) Release of Restricted Cash (1,021) 1,390
NET CASH USED IN INVESTING ACTIVITIES (51,322) (47,375) (24,383)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Redemption of Long-term Debt (6,159) (5,898) (6,284)
Proceeds from Issuance of Long-term Debt 11,523 8,585 7,000
Net Short-term Bank Borrowings 16,000 9,000 (16,000)
Deferred Debt Issuance Expense (230) (152) (65)
Common Stock Issuance Expense (22)
Restricted Cash 744
Proceeds from Issuance of Common Stock 1,234 1,453 1,462
Payment of Common Dividends (14,002) (13,137) (12,553)
Payment of Preferred Dividends (144) (144) (144)
Construction Advances and Contributions-Net 1,315 1,007 (171)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES 9,537 714 (26,033)
NET CHANGES IN CASH AND CASH EQUIVALENTS 1,058 410 796
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 3,879 3,469 2,673
CASH AND CASH EQUIVALENTS AT END OF PERIOD 4,937 3,879 3,469
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY:      
Utility Plant received as Construction Advances and Contributions 3,778 1,439 2,441
Long-term Debt Deobligation 476 466
Cash Paid During the Year for:      
Interest 5,616 5,430 5,702
Interest Capitalized 221 196 152
Income Taxes $ 2,754 $ 5,729 $ 1,391