Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Shares issued in public offering	2,946,864
Offering cost on issuance of shares	$ 1,228
Dividend reinvestment, shares	111,389	126,481	289,183
Cash dividend declared per share of common stock	$ 0.12	$ 0.12	$ 0.36
Treasury stock reissued, shares	2,053,136	51	40
COMMMON STOCK
Shares issued in public offering	2,946,864
Offering cost on issuance of shares	$ 1,228
Dividend reinvestment, shares	111,389	126,481	289,183
RETAINED EARNINGS
Cash dividend declared per share of common stock	$ 0.12	$ 0.12	$ 0.36
TREASURY STOCK, AT COST
Treasury stock reissued, shares	2,053,136	51	40