Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets
Securities available for sale, amortized cost (in dollars)	$ 277,739	$ 240,097
Securities held to maturity, fair value (in dollars)		$ 22
Preferred stock, Authorized shares	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, Authorized shares	20,000,000	20,000,000
Common stock, shares issued	13,800,681	13,736,942
Common stock, shares outstanding	13,800,681	13,736,942