Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 12,489	$ 11,484	$ 9,654
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of land	0	(316)	0
Depreciation and amortization	6,151	5,932	5,744
Increase in deferred income taxes	2,270	4,753	1,939
Other	189	199	213
Changes in assets and liabilities:
(Increase) decrease in accounts receivable and unbilled revenues	(73)	(632)	11
Increase in recoverable income taxes	(92)	(957)	0
Increase in materials and supplies, prepaid expenses, regulatory and other assets	(2,339)	(11,438)	(1,056)
Increase in accounts payable, accrued compensation and benefits, accrued expenses, deferred employee benefits, and other deferred credits	2,166	11,502	306
Increase (decrease) in accrued interest and taxes	(51)	(1,761)	1,627
Net cash provided by operating activities	20,710	18,766	18,438
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility plant additions, including debt portion of allowance for funds used during construction of $115 in 2015, $117 in 2014 and $46 in 2013	(13,844)	(14,139)	(9,852)
Acquisitions of water and wastewater systems	(352)	(369)	(28)
Proceeds from sale of land	0	346	0
Decrease in compensating balance	0	0	500
Decrease in notes receivable	11	40	32
Net cash used in investing activities	(14,185)	(14,122)	(9,348)
CASH FLOWS FROM FINANCING ACTIVITIES:
Customers' advances for construction and contributions in aid of construction	1,117	638	733
Repayments of customer advances	(447)	(419)	(313)
Proceeds of long-term debt issues	14,301	14,880	0
Debt issuance costs	(298)	(506)	0
Repayments of long-term debt	(11,886)	(14,923)	(47)
Repurchase of common stock	(2,546)	(5,692)	(1,772)
Issuance of common stock	2,307	2,703	3,018
Dividends paid	(7,682)	(7,402)	(7,156)
Net cash used in financing activities	(5,134)	(10,721)	(5,537)
Net change in cash and cash equivalents	1,391	(6,077)	3,553
Cash and cash equivalents at beginning of period	1,488	7,565	4,012
Cash and cash equivalents at end of period	2,879	1,488	7,565
Cash paid during the period for:
Interest, net of amounts capitalized	4,985	5,007	5,198
Income taxes	$ 2,155	$ 2,808	$ 1,921
Supplemental schedule of non-cash investing and financing activities:
Accounts payable includes $720 in 2015, $833 in 2014 and $974 in 2013 for the construction of utility plant.