Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Assets
Available-for-sale investment securities at amortized cost	$ 598,445	$ 621,126
Held-to-maturity investment securities at fair value	$ 47,599	$ 46,094
Stockholders’ Equity
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	11,260,232	11,206,576
Treasury stock - shares	602,663	600,794