Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net income	$ 183,684	$ 134,106	$ 119,558
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	33,684	54,698	74,388
Deferred income tax expense net of available for sale fair value tax adjustments	(17,819)	4,679	(756)
Depreciation, Depletion and Amortization	32,153	23,060	22,872
Benefit attributable to FDIC loss share	10,790	14,728	42,552
Accretion of acquired loans	(280,848)	(80,506)	(117,140)
Accretion of income for lease financing	(3,566)	(2,988)	(2,556)
Amortization and accretion of investment securities, net
Available for sale	17,274	15,343	15,127
Held to maturity	7,609	2,421	38
Losses (gains) on sales and calls of available-for-sale investment securities, net	2,803	(3,786)	(11,081)
Originations of loans held for sale	(550,193)	(738,797)	(526,719)
Proceeds from sales of loans, primarily mortgage loans sold in the secondary markets	574,321	757,298	544,690
Gains on sales of loans, net	(12,067)	(12,107)	(6,708)
Amortization of Intangible Assets	8,392	1,866	2,172
Recognition of stock compensation expense	10,937	9,260	8,014
Net decrease (increase) in other assets	181,772	88,530	(136,344)
Net (decrease) increase in other liabilities	(25,570)	(99,704)	121,228
NET CASH PROVIDED BY OPERATING ACTIVITIES	173,356	168,101	149,335
Proceeds from sale of securities
Available for sale	2,179,728	418,124	968,478
Proceeds from Sale of Other Investments	89,554	0	20,253
Proceeds from Sale of Held-to-maturity Securities	897	0	0
Proceeds from prepayments, calls, and maturities
Available for sale	699,647	853,179	1,018,372
Held to maturity	245,259	54,775	37,326
Other	0	0	12
Purchases of securities
Available for sale	(1,059,130)	(1,416,413)	(2,267,953)
Held to maturity	(1,832,993)	(113,918)	(60,115)
Other	(3,098)	(42)	(278)
Net decrease (increase) in loans and leases	307,939	(499,500)	(51,457)
Purchases of premises and equipment	(40,632)	(13,073)	(17,955)
Sales of premises and equipment	1,110	1,813	0
Cash received for acquisition, net of cash paid	188,948	0	0
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES	777,229	(715,055)	(353,317)
Financing Activities
Net increase in demand accounts	835,011	532,924	434,167
Net increase in savings and money market accounts	176,513	162,714	783,625
Net decrease in certificates and other time deposits	(514,103)	(367,822)	(1,054,189)
Net (decrease) increase in securities sold under agreements to repurchase	(367,995)	238,260	88,680
Proceeds from issuance of subordinated debt	249,930	0	0
Net decrease in wholesale borrowings	(655,603)	(66,579)	(122,545)
Net proceeds from issuance of preferred stock	96,550	0	0
Cash dividends - common	(96,222)	(69,459)	(69,255)
Cash dividends - preferred	(5,337)	0	0
Restricted stock activity	(9,521)	(2,389)	(2,295)
NET CASH (USED) PROVIDED BY FINANCING ACTIVITIES	(290,777)	427,649	58,188
Increase (decrease) in cash and cash equivalents	659,808	(119,305)	(145,794)
Cash and cash equivalents at beginning of year	258,014	377,319	523,113
Cash and cash equivalents at end of year	917,822	258,014	377,319
Supplemental Non-Cash Information
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	925,211
Adjustments to Additional Paid in Capital, Warrant Issued	3,000
Cash paid during the year for:
Interest expense	50,055	40,252	61,275
Federal income taxes	$ 27,662	$ 45,321	$ 29,115