Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net income	$ 85,796	$ 60,929
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	17,256	26,257
Provision (benefit) for deferred income taxes	(25,502)	1,671
Depreciation and amortization	14,029	11,532
Benefit attributable to FDIC loss share	7,858	11,117
Accretion of acquired loans	(108,676)	(42,211)
Accretion income for lease financing	(1,808)	(1,409)
Amortization and accretion of investment securities, net
Available for sale	12,276	7,708
Held to Maturity	3,223	124
Realized (gains) losses on sale of securities	2,803	(808)
Originations of loans held for sale	(309,247)	(399,140)
Proceeds from sales of loans, primarily mortgage loans sold in the secondary markets	316,750	414,385
Gains on sales of loans, net	(6,675)	(4,186)
Amortization of Intangible Assets	2,728	966
Recognition of stock compensation expense	6,216	5,410
Net Increase (Decrease) in Other Operating Assets	177,923	12,802
Net Increase (Decrease) in Other Operating Liabilities	(81,253)	(35,996)
NET CASH PROVIDED BY OPERATING ACTIVITIES	113,697	69,151
Proceeds from sales of securities
Proceeds from Sale of Available-for-sale Securities	2,179,728	161,078
Proceeds from Sale of Held-to-maturity Securities	897	0
Proceeds from prepayments, calls, and maturities
Available for sale	427,115	406,055
Held to maturity	73,810	22,140
Purchases of securities
Available for sale	(711,170)	(660,967)
Held to maturity	(1,263,297)	(66,120)
Other	(280)	(42)
Net decrease (increase) in loans and leases, excluding loans acquired	301,319	(119,807)
Purchases of premises and equipment	(11,402)	(3,434)
Sales of premises and equipment	181	0
Business Acquisition, Cost of Acquired Entity, Cash Paid	189,009
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES	1,185,910	(261,097)
Financing Activities
Net increase in demand accounts	131,262	215,488
Net increase in savings and money market accounts	110,152	133,189
Net decrease in certificates and other time deposits	(157,872)	(164,445)
Net (decrease) increase in securities sold under agreements to repurchase	(374,659)	30,645
Proceeds from Issuance of Long-term Debt	249,924	0
Net decrease in wholesale borrowings	(654,866)	(25,327)
Proceeds from Issuance of Preferred Stock and Preference Stock	96,550	0
Dividends, Common Stock, Cash	(43,717)	(34,710)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(2,399)	0
Restricted stock activity	(2,506)	(2,278)
NET CASH (USED) PROVIDED BY FINANCING ACTIVITIES	(648,131)	152,562
Increase (decrease) in cash and cash equivalents	651,476	(39,384)
Cash and cash equivalents at beginning of period	258,014	377,319
Cash and cash equivalents at end of period	909,490	337,935
SUPPLEMENTAL DISCLOSURES
Consideration from common stock conversion (1.37 ratio)	925,272
Consideration from the warrant issued to the Treasury for Citizens' TARP warrant	3,000
Cash paid during period for:
Interest, net of amounts capitalized	16,215	17,442
Federal income taxes	27,662	26,939
Warrant [Member]
SUPPLEMENTAL DISCLOSURES
Consideration from the warrant issued to the Treasury for Citizens' TARP warrant	$ 3,000