Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2011	$ 1,152,737	$ 8,832,222	$ 13,605,484	$ 34,073,278	$ 57,663,721
Net income (loss)				309,562	309,562
Other comprehensive income (loss), net			6,709,552		6,709,552
Cash dividends				(265,129)	(265,129)
Issuances of common stock, net	4,040	72,097		14,763	90,900
Balance at Jun. 30, 2012	1,156,777	8,904,319	20,315,036	34,132,474	64,508,606
Balance at Dec. 31, 2012	1,141,886	8,908,243	22,539,724	35,642,931	68,232,784
Net income (loss)				(765,224)	(765,224)
Other comprehensive income (loss), net			(13,727,608)		(13,727,608)
Cash dividends				(285,471)	(285,471)
Repurchases of common stock, net	(5,154)			(113,404)	(118,558)
Balance at Jun. 30, 2013	$ 1,136,732	$ 8,908,243	$ 8,812,116	$ 34,478,832	$ 53,335,923