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