Consolidated Statement of Changes in Stockholders' Equity (Unaudite) (Parentheticals) (USD $)	3 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010
Shares of common stock issued as a result of stock purchased under the Employee Stock Purchase Plan	7,975	11,355	9,081	6,420	9,629	6,270
Shares of common stock issued as a result of stock options exercised		10,967	24,300	750	1,504
Common cash dividends per share (in Dollars per share)		$ 0.04			$ 0.04
Shares of common stock exchanged		379				367
Shares of common stock issued in conjunction with the issuance of Series A Subordinated Notes						54,000
Common Stock [Member]
Shares of common stock issued as a result of stock options exercised			2,171
Series F Preferred Stock [Member]
Shares of Non-Cumulative Perpetual Preferred Stock issued	40,090
Series D Preferred Stock [Member]
Shares of Series D Cumulative Perpetual Preferred Stock redeemed	(38,237)
Exchange Of Series B To E Non-Cumulative Perpetual Convertible Preferred Stock Shares Exchanged [Member]
Shares Non-Cumulative Perpetual Preferred Stock exchanged (in Dollars)					$ 268
Exchange Of Series B To E Non-Cumulative Perpetual Convertible Preferred Stock Shares Issued [Member]
Shares Non-Cumulative Perpetual Preferred Stock exchanged (in Dollars)					13,400
Exchange Of Series C To E Non-Cumulative Perpetual Convertible Preferred Stock Shares Exchanged [Member]
Shares Non-Cumulative Perpetual Preferred Stock exchanged (in Dollars)					300
Exchange Of Series C To E Non-Cumulative Perpetual Convertible Preferred Stock Shares Issued [Member]
Shares Non-Cumulative Perpetual Preferred Stock exchanged (in Dollars)					$ 7,500
Series E Preferred Stock [Member]
Shares of Non-Cumulative Perpetual Preferred Stock issued					4,100