Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Securities held-to-maturity, market value (in Dollars)		$ 823,906
Securities available-for-sale, amortized cost (in Dollars)	$ 1,779,859	$ 1,290,676
Preferred stock shares authorized (in Shares)	10,000,000	10,000,000
Preferred stock shares issued (in Shares)	0	258,000
Preferred stock shares outstanding (in Shares)	0	258,000
Common stock par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized (in Shares)	100,000,000	100,000,000
Common stock shares issued (in Shares)	83,113,308	82,985,853
Common stock shares outstanding (in Shares)	78,905,743	78,778,288
Treasury stock shares (in Shares)	4,207,565	4,207,565