Consolidated Statement of Changes in Stockholders' Equity (Unaudite) (USD $)	Total	Preferred Stock [Member]	Preferred Stock [Member] Exchange OfSeriesB ToSeriesE Non Cumulative Perpetual Convertible Preferred Stock [Member]	Preferred Stock [Member] Exchange OfSeriesC ToSeriesE Non Cumulative Perpetual Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Exchange OfSeriesB ToSeriesE Non Cumulative Perpetual Convertible Preferred Stock [Member]	Additional Paid-in Capital [Member] Exchange OfSeriesC ToSeriesE Non Cumulative Perpetual Convertible Preferred Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Treasury Stock [Member]
Balance at Jan. 01, 2010
Comprehensive income:
Net income	$ 1,214,933								$ 1,292,009		$ (77,076)
Other comprehensive income (loss), net of tax	1,663,236									1,663,236
Comprehensive income	2,878,169
Preferred cash dividends declared and accrued	(924,088)								(924,088)
Discount accretion on cumulative preferred stock						109,331			(109,331)
Proceeds from issuance of warrants to purchase 54,000 shares of common stock in conjunction with the issuance of Series A Subordinated Notes	84,240					84,240
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan	47,119				6,270	40,849
Exchange of common stock	(3,097)				(367)	(2,730)
Stock compensation expense	181,489					181,489
Restricted stock awards					23,598	(23,598)
Other adjustments to noncontrolling interests	(2,065)										(2,065)
Balance at Mar. 31, 2010	127,856,643	38,805			4,704,037	82,583,911			38,717,067	1,798,844	1,620,489	(1,606,510)
Balance at Apr. 01, 2010
Comprehensive income:
Net income	1,799,837								1,737,501		62,336
Other comprehensive income (loss), net of tax	2,043,708									2,043,708
Comprehensive income	3,843,545
Common cash dividends declared	(182,730)								(182,730)
Preferred cash dividends declared and accrued	(924,088)								(924,088)
Discount accretion on cumulative preferred stock						113,225			(113,225)
Exchange of Non-Cumulative Perpetual Preferred Stock			13,132	7,200			(13,132)	(7,200)
Proceeds from issuance of 4,100 shares of Series E Non-Cumulative Perpetual Convertible Preferred Stock	3,203,433	4,100				3,199,333
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan	72,362				9,629	62,733
Proceeds from issuance of common stock as a result of stock options exercised	13,219				1,504	11,715
Stock compensation expense	112,693					112,693
Other adjustments to noncontrolling interests	4,706										4,706
Balance at Jun. 30, 2010	133,999,783	63,237			4,715,170	86,063,278			39,234,525	3,842,552	1,687,531	(1,606,510)
Balance at Dec. 31, 2010	132,570,708	63,237			4,732,428	86,478,269			40,550,900	704,165	1,648,219	(1,606,510)
Comprehensive income:
Net income	2,231,484								2,124,960		106,524
Other comprehensive income (loss), net of tax	(1,345,554)									(1,345,554)
Comprehensive income	885,930
Preferred cash dividends declared and accrued	(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	58,330				9,081	49,249
Proceeds from issuance of common stock as a result of stock options exercised	170,367				24,300	146,067
Exchange of common stock	(16,241)				(2,171)	(14,070)
Stock compensation expense	206,569					206,569
Restricted stock awards					69,924	(69,924)
Other adjustments to noncontrolling interests	(2,065)										(2,065)
Balance at Mar. 31, 2011	132,958,136	63,237			4,833,562	86,913,069			41,643,489	(641,389)	1,752,678	(1,606,510)
Balance at Apr. 01, 2011
Comprehensive income:
Net income	2,773,214								2,674,969		98,245
Other comprehensive income (loss), net of tax	2,409,728									2,409,728
Comprehensive income	5,182,942
Common cash dividends declared	(185,863)								(185,863)
Preferred cash dividends declared and accrued	(915,462)								(915,462)
Discount accretion on cumulative preferred stock						120,280			(120,280)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan	72,937				11,355	61,582
Proceeds from issuance of common stock as a result of stock options exercised	76,172				10,967	65,205
Exchange of common stock	(3,412)				(379)	(3,033)
Stock compensation expense	141,370					141,370
Other adjustments to noncontrolling interests	(2,066)										(2,066)
Balance at Jun. 30, 2011	$ 137,324,754	$ 63,237			$ 4,855,505	$ 87,298,473			$ 43,096,853	$ 1,768,339	$ 1,848,857	$ (1,606,510)