Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets
Available-for-sale investment securities at amortized cost	$ 730,632	$ 632,967
Held-to-maturity investment securities at fair value	$ 47,626	$ 48,442
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	18,930,081	15,599,643
Treasury stock - shares	596,045	590,246