Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands	Total	Preferred Stock	Common Stock	Warrant	Capital Surplus	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Beginning Balance at Dec. 31, 2012	$ 1,645,202	$ 0	$ 127,937	$ 0	$ 475,979	$ (16,205)	$ 1,195,850	$ (138,359)
Net income	85,796						85,796
Other Comprehensive Income (Loss), Net of Tax	(55,692)					(55,692)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	30,104
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	30,105
Dividends, Preferred Stock, Cash	(2,399)						(2,399)
Cash dividends - common stock	(43,717)						(43,717)
Stock Issued During Period, Value, Acquisitions	925,272
Nonvested (restricted) shares granted	(6,813)				(19,094)			12,281
Restricted Stock Activity	(2,506)				894			(3,400)
Deferred compensation trust	0				246			(246)
Share-based compensation	6,216				6,216
Issuance of preferred stock	96,550	100,000			(3,450)
Adjustments to Additional Paid in Capital, Warrant Issued	3,000
Ending Balance at Jun. 30, 2013	2,650,909	100,000	127,937	3,000	1,386,063	(71,896)	1,235,530	(129,724)
Beginning Balance at Dec. 31, 2013	2,702,894	100,000	127,937	3,000	1,390,643	(66,876)	1,277,975	(129,785)
Net income	112,974			0
Other Comprehensive Income (Loss), Net of Tax	27,369
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	140,343	0	0	0	0	27,369	112,974	0
Dividends, Preferred Stock, Cash	(2,938)	0	0	0	0	0	(2,938)	0
Cash dividends - common stock	(52,640)			0			(52,640)
Stock Issued During Period, Value, Acquisitions	0
Nonvested (restricted) shares granted	99			0	(12,993)			13,092
Restricted Stock Activity	(4,221)			0	802			(5,023)
Deferred compensation trust	0			0	600			(600)
Share-based compensation	8,201			0	8,201			0
Adjustments to Additional Paid in Capital, Warrant Issued	0
Ending Balance at Jun. 30, 2014	$ 2,791,738	$ 100,000	$ 127,937	$ 3,000	$ 1,387,253	$ (39,507)	$ 1,335,371	$ (122,316)