Consolidated Statements of Changes in Stockholders' Equity (unaudited) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2010	$ 24,684,945	$ 16,026,062	$ 42,809,769	$ (2,569,127)	$ 80,951,649
Balance (in shares) at Dec. 31, 2010	4,936,989
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	2,423,233	0	2,423,233
Other comprehensive income, net of tax	0	0	0	2,343,432	2,343,432
Exercise of stock options	110,100	174,105	0	0	284,205
Exercise of stock options (in shares)	22,020
Stock compensation expense	0	82,466	0	0	82,466
Cash dividends	0	0	(742,563)	0	(742,563)
Balance at Sep. 30, 2011	24,795,045	16,282,633	44,490,439	(225,695)	85,342,422
Balance (in shares) at Sep. 30, 2011	4,959,009
Balance at Dec. 31, 2011	24,795,045	16,309,983	45,109,268	(349,581)	85,864,715
Balance (in shares) at Dec. 31, 2011	4,959,009				4,959,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	2,790,696	0	2,790,696
Other comprehensive income, net of tax	0	0	0	2,403,011	2,403,011
Exercise of stock options (in shares)					0
Stock compensation expense	0	81,060	0	0	81,060
Cash dividends	0	0	(743,851)	0	(743,851)
Balance at Sep. 30, 2012	$ 24,795,045	$ 16,391,043	$ 47,156,113	$ 2,053,430	$ 90,395,631
Balance (in shares) at Sep. 30, 2012	4,959,009				4,959,009