CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2009	$ 43,001	$ 22,806,829	$ 87,826,331	$ (20,024,661)	$ (565,835)	$ 90,085,665
Net income	0	0	10,101,873	0	0	10,101,873
Other comprehensive income	0	0	0	0	668,310	668,310
Distribution of shares of treasury stock for directors' deferred compensation plan	0	(661,102)	0	650,324	0	(10,778)
Distribution of shares of treasury stock granted for employee restricted stock awards	0	(149,303)	0	150,446	0	1,143
Restricted stock units for directors' deferred compensation plan	0	111,772	0	0	0	111,772
Cash dividends declared	0	0	(3,520,584)	0	0	(3,520,584)
Distribution of shares of treasury stock for directors' compensation	0	(44,677)	0	258,906	0	214,229
Distribution of shares of treasury stock for employee compensation	0	(15,537)	0	70,537	0	55,000
Sale of treasury stock	0	(25,860)	0	153,360	0	127,500
Purchase of shares of treasury stock	0	0	0	(425,567)	0	(425,567)
Balances at Dec. 31, 2010	43,001	22,022,122	94,407,620	(19,166,655)	102,475	97,408,563
Net income	0	0	10,537,755	0	0	10,537,755
Other comprehensive income	0	0	0	0	(1,543,853)	(1,543,853)
Restricted stock awards	0	28,141	0	0	0	28,141
Distribution of shares of treasury stock for directors' deferred compensation plan	0	(7,364)	0	7,310	0	(54)
Distribution of shares of treasury stock granted for employee restricted stock awards	0	(226,360)	0	225,350	0	(1,010)
Forfeit of restricted stock awards	0	27,762	0	(27,762)	0	0
Restricted stock units for directors' deferred compensation plan	0	80,083	0	0	0	80,083
Cash dividends declared	0	0	(4,316,475)	0	0	(4,316,475)
Distribution of shares of treasury stock for directors' compensation	0	(33,831)	0	265,262	0	231,431
Distribution of shares of treasury stock for employee compensation	0	(6,140)	0	61,140	0	55,000
Sale of treasury stock	0	(25,090)	0	242,610	0	217,520
Purchase of shares of treasury stock	0	0	0	(501,299)	0	(501,299)
Issuance related to FOFC Merger	10,100	23,723,538	0	0	0	23,733,638
Balances at Dec. 31, 2011	53,101	45,582,861	100,628,900	(18,894,044)	(1,441,378)	125,929,440
Net income	0	0	11,022,240	0	0	11,022,240
Other comprehensive income	0	0	0	0	(1,365,551)	(1,365,551)
Restricted stock awards	0	79,510	0	0	0	79,510
Distribution of shares of treasury stock for directors' deferred compensation plan	0	(81,747)	0	82,588	0	841
Distribution of shares of treasury stock granted for employee restricted stock awards	0	(274,196)	0	274,196	0	0
Restricted stock units for directors' deferred compensation plan	0	86,717	0	0	0	86,717
Cash dividends declared	0	0	(4,572,958)	0	0	(4,572,958)
Distribution of shares of treasury stock for directors' compensation	0	(28,121)	0	261,069	0	232,948
Distribution of shares of treasury stock for employee compensation	0	(8,052)	0	88,052	0	80,000
Sale of treasury stock	0	101	0	257,449	0	257,550
Purchase of shares of treasury stock	0	0	0	(635,800)	0	(635,800)
Balances at Dec. 31, 2012	$ 53,101	$ 45,357,073	$ 107,078,182	$ (18,566,490)	$ (2,806,929)	$ 131,114,937