Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Available for sale securities, amortized cost	$ 579,722	$ 617,128
Held to maturity securities, fair value	$ 33,933	$ 16,705
Preferred stock, shares authorized	50,000	50,000
Preferred stock, shares issued	0	0
Common stock, shares authorized	24,000,000	24,000,000
Common stock, shares issued	11,140,100	11,122,247
Treasury stock, shares	605,655	615,123