Consolidated Statements of Changes in Shareholders Equity (Unaudited) (USD $) In Thousands	Total	Preferred Stock	Common Stock	Common Stock Warrant	Capital Surplus	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Beginning Balance at Dec. 31, 2009	$ 1,065,627	$ 0	$ 127,937	$ 0	$ 88,573	$ (25,459)	$ 1,043,625	$ (169,049)
Net income	46,883						46,883
Cash dividends - common stock ($0.32 and $0.32 per share for the year 2010 and 2011, respectively)	(31,090)						(31,090)
Options exercised (48,365 shares)	826				(330)			1,156
Nonvested (restricted) shares granted (407,055 and 560,348 shares for the year 2010 and 2011, respectively)	(6)				(9,917)			9,911
Restricted stock activity (161,234 and 135,912 shares for the year 2010 and 2011, respectively)	(2,535)				1,032			(3,567)
Deferred compensation trust (2,877 increase in and 6,582 decrease in shares for the year 2010 and 2011 respectively)					(98)			98
Share-based compensation	4,634				4,634
Issuance of common stock (21,487,860 and 0 shares for the year 2010 and 2011, respectively)	400,064				400,064
Net unrealized gains on investment securities, net of taxes	20,942					20,942
Ending Balance at Jun. 30, 2010	1,505,345	0	127,937	0	483,958	(4,517)	1,059,418	(161,451)
Beginning Balance at Dec. 31, 2010	1,507,715	0	127,937	0	485,567	(26,103)	1,080,900	(160,586)
Net income	57,324						57,324
Cash dividends - common stock ($0.32 and $0.32 per share for the year 2010 and 2011, respectively)	(34,616)						(34,616)
Nonvested (restricted) shares granted (407,055 and 560,348 shares for the year 2010 and 2011, respectively)	1				(13,656)			13,657
Restricted stock activity (161,234 and 135,912 shares for the year 2010 and 2011, respectively)	(2,223)				312			(2,535)
Deferred compensation trust (2,877 increase in and 6,582 decrease in shares for the year 2010 and 2011 respectively)					(2)			2
Share-based compensation	5,228				5,228
Net unrealized gains on investment securities, net of taxes	16,958					16,958
Ending Balance at Jun. 30, 2011	$ 1,550,387	$ 0	$ 127,937	$ 0	$ 477,449	$ (9,145)	$ 1,103,608	$ (149,462)