CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 11,022,240	$ 10,537,755	$ 10,101,873
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of intangible assets	1,046,720	1,041,193	730,894
Deferred income tax expense	646,899	3,416,135	153,450
Provision for loan losses	827,567	958,333	1,125,000
Depreciation and amortization of fixed assets	2,946,499	2,861,644	2,778,065
Amortization of premiums on securities, net	1,827,055	1,394,115	608,257
Gains on sales of loans held for sale, net	(484,006)	(179,096)	(241,537)
Proceeds from sales of loans held for sale	15,684,266	7,778,633	9,105,462
Loans originated and held for sale	(15,862,142)	(7,507,967)	(9,151,419)
Net losses (gain) on sale of other real estate owned	44,648	(91,533)	(24,563)
Net gains on trading assets	(26,880)	(2,506)	0
Net gains on securities transactions	(300,516)	(1,108,091)	(450,666)
Net impairment loss recognized on investment securities	0	67,400	393,005
Proceeds from sales of trading assets	96,498	19,938	0
Purchase of trading assets	(123,478)	(311,813)	0
Decrease (increase) in other assets	6,083,953	(9,890,546)	2,708,278
Decrease in prepaid FDIC Assessment	732,777	164,744	1,074,474
Decrease in accrued interest payable	(347,519)	(287,822)	(344,853)
Expense related to restricted stock units for directors' deferred compensation plan	86,717	80,083	111,772
Expense related to employee stock compensation	80,000	55,000	55,000
Expense related to employee restricted stock awards	79,510	28,141	1,143
Increase (decrease) in other liabilities	587,918	206,721	(959,274)
Income from bank owned life insurance	(86,577)	(88,389)	(87,489)
Proceeds from sales of student loans	0	0	137,509
Net cash provided by operating activities	24,562,149	9,142,072	17,824,381
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales and calls of securities available for sale	90,870,086	88,741,210	85,440,031
Proceeds from maturities and principal collected on securities available for sale	29,341,503	31,200,076	59,166,409
Proceeds from maturities and principal collected on securities held to maturity	4,295,975	3,965,483	10,057,026
Purchases of securities available for sale	(80,443,763)	(127,405,986)	(136,077,171)
Purchases of securities held to maturity	(1,732,507)	(4,562,281)	(5,612,297)
Purchase of Federal Home Loan Bank and Federal Reserve Bank stock	(26,250)	(1,002,500)	(58,200)
Redemption of Federal Home Loan Bank and Federal Reserve Bank stock	825,300	400,350	9,900
Purchases of premises and equipment	(3,668,479)	(2,551,969)	(2,084,537)
Cash paid Fort Orange Financial Corp. acquisition	0	(8,137,816)	0
Cash received Fort Orange Financial Corp. acquisition	0	33,284,995	0
Proceeds from sale of other real estate owned	796,446	327,087	317,823
Net increase in loans	(97,115,130)	(19,322,219)	(20,117,424)
Net cash used by investing activities	(56,856,819)	(5,063,570)	(8,958,440)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits, NOW accounts, savings accounts, and insured money market accounts	86,541,575	55,243,997	13,959,189
Net decrease in time deposits and individual retirement accounts	(40,300,400)	(43,578,345)	(28,663,430)
Net decrease in securities sold under agreements to repurchase	(4,396,192)	(18,236,546)	(9,488,642)
Repayments of Federal Home Loan Bank long term advances	(16,118,555)	(910,246)	0
Purchase of treasury stock	(635,800)	(501,299)	(425,567)
Sale of treasury stock	257,449	242,610	153,360
Cash dividends paid	(5,714,039)	(4,056,597)	(3,519,470)
Net cash provided (used) by financing activities	19,634,038	(11,796,426)	(27,984,560)
Net decrease in cash and cash equivalents	(12,660,632)	(7,717,924)	(19,118,619)
Cash and cash equivalents, beginning of period	52,901,853	60,619,777	79,738,396
Cash and cash equivalents, end of period	40,241,221	52,901,853	60,619,777
Cash paid during the year for:
Interest	5,642,946	6,782,999	8,560,664
Income Taxes	1,732,411	5,110,847	5,475,675
Supplemental disclosure of non-cash activity:
Transfer of loans to other real estate owned	$ 618,302	$ 533,976	$ 554,246