Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parentheticals) (Common Stock [Member])	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Shares of common stock issued as a result of stock purchased under the Employee Stock Purchase Plan	5,884	7,767
Shares of common stock issued as a result of stock options exercised	19,278
Stock Options [Member]
Shares of common stock issued as a result of stock options exercised		276
Shares of common stock exchanged	(7,048)
Restricted Stock [Member]
Shares of common stock exchanged	16,798	(576)