Consolidated Statement of Changes in Stockholders' Equity (USD $)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2010	$ 63,237	$ 4,732,428	$ 86,478,269	$ 40,550,900	$ 704,165	$ 1,648,219	$ (1,606,510)	$ 132,570,708
Comprehensive income:
Net income				2,124,960		106,524		2,231,484
Other comprehensive loss, net of tax					(1,345,554)			(1,345,554)
Comprehensive income								885,930
Preferred cash dividends declared				(915,462)				(915,462)
Discount accretion on cumulative preferred stock			116,909	(116,909)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan		9,081	49,249					58,330
Proceeds from issuance of common stock as a result of stock options exercised		24,300	146,067					170,367
Exchange of shares of common stock in connection with share based compensation		(2,171)	(14,070)					(16,241)
Stock compensation expense			206,569					206,569
Restricted stock award		69,924	(69,924)
Distributions to noncontrolling interests						(2,065)		(2,065)
Balance at Mar. 31, 2011	63,237	4,833,562	86,913,069	41,643,489	(641,389)	1,752,678	(1,606,510)	132,958,136
Balance at Dec. 31, 2011	65,090	4,879,435	89,702,533	44,585,902	4,754,714	2,051,538	(1,606,510)	144,432,702
Comprehensive income:
Net income				3,236,818		166,031		3,402,849
Other comprehensive loss, net of tax					(1,517,235)			(1,517,235)
Comprehensive income								1,885,614
Preferred cash dividends declared				(938,625)				(938,625)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan		7,767	55,566					63,333
Proceeds from issuance of common stock as a result of stock options exercised		276	2,374					2,650
Exchange of shares of common stock in connection with share based compensation		(576)	(2,103)					(2,679)
Stock compensation expense			326,245					326,245
Restricted stock award		57,770	(57,770)
Distributions to noncontrolling interests						(2,066)		(2,066)
Balance at Mar. 31, 2012	$ 65,090	$ 4,944,672	$ 90,026,845	$ 46,884,095	$ 3,237,479	$ 2,215,503	$ (1,606,510)	$ 145,767,174