Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Shares issued using employee stock purchase plan	4,726	9,129	14,694
Shares issued using stock option exercises	8,800
Shares issued using dividend reinvestment plan	644	687	2,875
Cash dividends per share		$ 0.01	$ 0.07
Common Stock
Shares issued using employee stock purchase plan	4,726	9,129	14,694
Shares issued using stock option exercises	8,800
Shares issued using dividend reinvestment plan	644	687	2,875
Cash dividends per share		$ 0.01	$ 0.07