Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parentheticals) (USD $)	3 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011
Shares of common stock issued as a result of stock purchased under the Employee Stock Purchase Plan (in Shares)	7,642	10,856	7,767	7,975	11,355	9,081
Shares of common stock issued as a result of stock options exercised (in Shares)	7,075	9,090	276		10,967	24,300
Shares of common stock exchanged (in Shares)		611	(576)		379	2,171
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 (in Shares)	1,000	4,300
Series F Noncumulative Perpetual Preferred Stock [Member]
Shares of preferred stock redeemed (in Shares)		10,223
Shares of Series F Non-Cumulative Perpetual Preferred Stock issued (in Shares)				40,090
Series D Cumulative Perpetual Preferred Stock [Member]
Shares of preferred stock redeemed (in Shares)				38,237