Consolidated Statements Of Stockholders' Equity (USD $)	Common Stock	Additional Paid-in Capital	Retained Earnings	Total
BALANCE at Dec. 31, 2008	$ 8,904,915	$ 26,543,470	$ 73,487,881	$ 108,936,266
Net income			22,077,454	22,077,454
Cash dividends			(9,617,416)	(9,617,416)
BALANCE at Dec. 31, 2009	8,904,915	26,543,470	85,947,919	121,396,304
Net income			14,310,042	14,310,042
Cash dividends			(21,371,793)	(21,371,793)
BALANCE at Dec. 31, 2010	8,904,915	26,543,470	78,886,168	114,334,553
Net income			9,516,205	9,516,205
Cash dividends			(1,870,029)	(1,870,029)
BALANCE at Dec. 31, 2011	$ 8,904,915	$ 26,543,470	$ 86,532,344	$ 121,980,729