Consolidated Statement of Changes in Stockholders' Equity (Parentheticals) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010 Preferred Stock [Member] Series B Non-Cumulative Perpetual Preferred Stock [Member]	Dec. 31, 2010 Preferred Stock [Member] Exchange Of Series B To Series E Non-Cumulative Perpetual Convertible Preferred Stock [Member]	Dec. 31, 2010 Preferred Stock [Member] Series C Non-Cumulative Perpetual Preferred Stock [Member]	Dec. 31, 2010 Preferred Stock [Member] Exchange of Series C Non-Cumulative Perpetual Preferred Stock Exchanged for Series E Non-Cumulative Perpetual Convertible Preferred Stock [Member]Preferred	Dec. 31, 2010 Preferred Stock [Member] Series E Non-Cumulative Perpetual Preferred Stock [Member]	Dec. 31, 2010 Preferred Stock [Member] Series A Subordinated Notes and Detachable Warrants [Member]	Dec. 31, 2012 Preferred Stock [Member] Series F Noncumulative Perpetual Preferred Stock [Member]	Dec. 31, 2011 Preferred Stock [Member] Series F Noncumulative Perpetual Preferred Stock [Member]	Dec. 31, 2011 Preferred Stock [Member] Series D Cumulative Perpetual Preferred Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2010 Common Stock [Member]	Dec. 31, 2011 Warrants Associated With Series D Cumulative Perpetual Preferred Stock [Member]
Common cash dividends per share (in Dollars per share)	$ 0.08
Shares of Preferred Stock redeemed (in Shares)		268		300				10,223		38,237				521,888
Shares of preferred stock issued (in Shares)			13,400		7,500	4,100			40,090
Shares of common stock issued in conjunction with the Series A Subordinated Notes (in Shares)							54,000
Shares of common stock issued as a result of stock purchased under the Employee Stock Purchase Plan (in Shares)											31,554	36,174	28,907
Shares of common stock issued as a result of stock options exercised (in Shares)	36,459											36,459	5,754
Shares of common stock exchanged (in Shares)											(576)		(367)
Accelerated discount accretion on cumulative preferred stock (in Dollars)	$ 1,252,895
Shares of common stock exchanged (in Shares)											(611)	(2,550)
Proceeds from issuance of shares of common stock as a result of stock options exercised (in Shares)											17,876