Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Securities available-for-sale, amortized cost (in Dollars)	$ 1,547,642	$ 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	84,232,727	84,022,118
Common stock shares outstanding	80,025,162	79,814,553
Treasury stock shares	4,207,565	4,207,565