CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 22,742	$ 20,028	$ 18,445
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	13,532	13,087	12,191
Provision for Deferred Income Taxes and Investment Tax Credits	3,553	15,753	3,130
Equity Portion of Allowance for Funds Used During Construction (AFUDC)	(423)	(228)	(207)
Cash Surrender Value of Life Insurance	(101)	(76)	(108)
Stock Compensation Expense	829	633	539
Adoption of Repairs on Tangible Property Regulations Net		2,680
Changes in Assets and Liabilities:
Accounts Receivable	(69)	(48)	1,950
Unbilled Revenues	(344)	(309)	(285)
Materials & Supplies	(1,494)	(347)	(269)
Prepayments	11	(46)	(261)
Accounts Payable	5,818	171	26
Accrued Taxes	3,259	178	816
Accrued Interest	(20)	(30)	(17)
Employee Benefit Plans	(1,601)	(129)	(3,243)
Unearned Revenue & Advanced Service Fees	43	41	2
Other Assets and Liabilities	1,336	(146)	(138)
NET CASH PROVIDED BY OPERATING ACTIVITIES	47,071	51,212	32,571
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility Plant Expenditures, Including AFUDC of $196 in 2016, $152 in 2015 and $110 in 2014	(47,375)	(25,773)	(22,596)
Restricted Cash		1,390	(100)
Investment in Joint Venture			857
NET CASH USED IN INVESTING ACTIVITIES	(47,375)	(24,383)	(21,839)
CASH FLOWS FROM FINANCING ACTIVITIES:
Redemption of Long-term Debt	(5,898)	(6,284)	(5,481)
Proceeds from Issuance of Long-term Debt	8,585	7,000	12,246
Net Short-term Bank Borrowings	9,000	(16,000)	(9,450)
Deferred Debt Issuance Expense	(152)	(65)	(141)
Common Stock Issuance Expense		(22)
Restricted Cash		744
Proceeds from Issuance of Common Stock	1,453	1,462	1,493
Payment of Common Dividends	(13,137)	(12,553)	(12,231)
Payment of Preferred Dividends	(144)	(144)	(151)
Construction Advances and Contributions-Net	1,007	(171)	822
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	714	(26,033)	(12,893)
NET CHANGES IN CASH AND CASH EQUIVALENTS	410	796	(2,161)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	3,469	2,673	4,834
CASH AND CASH EQUIVALENTS AT END OF PERIOD	3,879	3,469	2,673
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY:
Utility Plant received as Construction Advances and Contributions	1,439	2,441	6,598
Long-term Debt Deobligation	476	466
Cash Paid During the Year for:
Interest	5,430	5,702	5,745
Interest Capitalized	196	152	110
Income Taxes	$ 5,729	$ 1,391	$ 5,903