Consolidated Statement of Comprehensive Income (Unaudited) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statement Of Comprehensive Income [Abstract]
Unrealized holding gains arising during the period, tax	$ 31,643	$ 188,764	$ 105,055	$ 361,891
Reclassification adjustment for gains recognized in income, tax	$ 154,681	$ 2,496	$ 325,638	$ 44,514