Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Available for sale securities, amortized cost	$ 621,126	$ 628,584
Total held-to-maturity securities	$ 46,094	$ 47,124
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	11,206,576	11,155,648
Treasury stock, shares	600,794	607,688