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, 2011	$ 1,565,953	$ 0	$ 127,937	$ 0	$ 479,882	$ (23,887)	$ 1,131,203	$ (149,182)
Net income	95,882						95,882
Other Comprehensive Income (Loss), Net of Tax	9,987					9,987
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	105,869
Cash dividends - common stock	(52,084)						(52,084)
Consideration from Common Stock conversion (1.37 ratio)	0
Nonvested (restricted) shares granted	0				(14,481)			14,481
Restricted Stock Activity	(2,341)				1,023			(3,364)
Deferred compensation trust	0				50			(50)
Share-based compensation	7,258				7,258
Consideration from the warrant issued to the Treasury for Citizens' TARP warrant	0
Adjustments to Additional Paid in Capital, Other	49				49
Ending Balance at Sep. 30, 2012	1,624,704	0	127,937	0	473,781	(13,900)	1,175,001	(138,115)
Beginning Balance at Dec. 31, 2012	1,645,202	0	127,937	0	475,979	(16,205)	1,195,850	(138,359)
Net income	126,510						126,510
Other Comprehensive Income (Loss), Net of Tax	(67,407)					(67,408)
Other Comprehensive Loss, net of tax	(67,408)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	59,102
Dividends, Preferred Stock, Cash	(3,868)						(3,868)
Cash dividends - common stock	(69,938)						(69,938)
Consideration from Common Stock conversion (1.37 ratio)	925,272				925,272
Nonvested (restricted) shares granted	(6,814)				(19,257)			12,443
Restricted Stock Activity	(2,608)				956			(3,564)
Deferred compensation trust	0				391			(391)
Share-based compensation	8,747				8,747			0
Issuance of preferred stock	96,550	100,000			(3,450)
Consideration from the warrant issued to the Treasury for Citizens' TARP warrant	3,000			3,000
Ending Balance at Sep. 30, 2013	$ 2,654,645	$ 100,000	$ 127,937	$ 3,000	$ 1,388,638	$ (83,613)	$ 1,248,554	$ (129,871)