Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Activities
Net income	$ 8,924,000	$ 8,233,000	$ 8,998,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	891,000	1,024,000	1,167,000
Provision for loan losses	30,000	200,000	400,000
Net gain on investment securities available-for-sale	(674,000)	(783,000)	(1,112,000)
Net (gain) loss on sale of other real estate owned, repossessed assets and premises and equipment	(2,000)	17,000	2,000
Net gain on sale of loans	(320,000)	(356,000)	(258,000)
Loss on sale of indirect lease financing portfolio	223,000
Gain on sale of internet domain name			(1,000,000)
Proceeds from sales of residential mortgages held-for-sale	9,204,000	10,903,000	6,589,000
Origination of residential mortgages held-for-sale	(8,686,000)	(11,154,000)	(6,711,000)
Income on bank-owned life insurance	(308,000)	(307,000)	(472,000)
Stock-based compensation expense	88,000	85,000	83,000
Net decrease (increase) in trading securities	593,000	18,000	(4,207,000)
Deferred income tax (benefit) provision	(145,000)		368,000
Net increase (decrease) in income taxes payable	48,000	77,000	(65,000)
Net (increase) decrease in accrued interest receivable	(566,000)	6,000	11,000
Amortization of mortgage servicing rights and change in valuation allowance	75,000	80,000	62,000
Net amortization of premiums and discounts on investment securities	1,846,000	2,094,000	2,148,000
Net increase (decrease) in accrued interest payable	5,000	(14,000)	(48,000)
Increase in other assets	(363,000)	(71,000)	(100,000)
Increase (decrease) in other liabilities	469,000	(936,000)	122,000
Net cash provided by operating activities	11,332,000	9,116,000	5,977,000
Investing Activities
Proceeds from payments, maturities and calls of investment securities available-for-sale	107,278,000	94,372,000	82,360,000
Proceeds from maturities of investment securities held-to-maturity	147,000
Proceeds from the sale of investment securities available-for-sale	32,573,000	47,960,000	29,972,000
Purchases of investment securities available-for-sale	(174,943,000)	(132,048,000)	(92,017,000)
Proceeds from redemption of investment in restricted bank stock	1,482,000	1,319,000	3,673,000
Purchase of restricted bank stock	(1,991,000)	(1,180,000)	(2,556,000)
Net increase in loans	(26,567,000)	(60,850,000)	(55,263,000)
Proceeds from sale of indirect lease financing portfolio held for investment	8,345,000
Net purchases of premises and equipment	(317,000)	(580,000)	(995,000)
Proceeds from sale of internet domain name			1,000,000
Redemption of bank-owned life insurance			234,000
Proceeds from sales of other real estate owned and repossessed assets	2,000	3,245,000	152,000
Net cash used in investing activities	(53,991,000)	(47,762,000)	(33,440,000)
Financing Activities
Net increase in non-interest bearing deposits	20,467,000	11,623,000	10,933,000
Net increase in interest-bearing deposits	3,102,000	26,571,000	26,127,000
Net increase in short-term borrowings	15,497,000	1,974,000	33,000
Repayments of long-term debt			(5,000,000)
Tax benefit from exercise of stock options	17,000	21,000	29,000
Cash dividends paid, net of reinvestment	(3,556,000)	(3,445,000)	(3,328,000)
Proceeds from issuance of common stock	862,000	648,000	628,000
Net cash provided by (used in) financing activities	36,389,000	37,392,000	29,422,000
Increase in cash and cash equivalents	(6,270,000)	(1,254,000)	1,959,000
Cash and cash equivalents at beginning of year	16,991,000	18,245,000	16,286,000
Cash and cash equivalents at end of period	10,721,000	16,991,000	18,245,000
Supplemental Cash Flow Disclosures
Interest paid	4,728,000	4,520,000	4,592,000
Income taxes paid	$ 3,132,000	2,479,000	2,310,000
Non-cash transactions:
Transfer of loans to repossessed assets or other real estate owned		215,000	373,000
Unsettled trades to purchase securities		$ 494,000	$ 1,355,000