Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Securities available-for-sale, amortized cost (in Dollars)	$ 1,378,088	$ 1,324,408
Common stock par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized	100,000,000	100,000,000
Common stock shares issued	86,916,637	84,022,118
Common stock shares outstanding	81,001,822	79,814,553
Treasury stock shares	5,914,815	4,207,565