Balance Sheet Parenthetical Parentheticals (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Investment securities available for sale at amortized cost	$ 836,987	$ 789,471
Investment securities held to maturity at fair value	$ 0	$ 2,497
Preferred stock par value per share	$ 1.00	$ 1.00
Preferred stock shares authorized	2,000,000	2,000,000
Series B Preferred stock shares issued	401	401
Series B Preferred stock shares outstanding	401	401
Series B Preferred stock liquidation value per share	$ 100,000	$ 100,000
Common stock par value per share	$ 1.00	$ 1.00
Common stock shares authorized	170,000,000	170,000,000
Common stock shares issued	78,004,135	76,307,329
Common stock shares outstanding	78,004,135	76,307,329