Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income for the period	$ 119,550	$ 83,026	$ 220,760	$ 193,413
Adjustments to reconcile net income to net cash provided by operating activities:
Gains (Losses) on Extinguishment of Debt	0	40,282	0	40,282
Net impairment losses on investment securities	0	4,217	27	14,334
Provision for credit losses	(47,637)	(18,363)	(49,259)	(53,752)
Depreciation and amortization	31,150	21,935	63,554	60,193
Fixed income securities gains (losses), net	(5,026)	1,153	(35,940)	(2,146)
Deferred income tax expense (benefit)	(58,870)	(7,726)	19,408	(6,444)
Net decrease (increase) in trading securities	(247)	1,882	(22,109)	1,871
Net decrease (increase) in loans held for sale	(39,322)	33,450	1,873	123,446
Change in other liabilities	19,586	2,967	(57,994)	(45,510)
Change in other assets	(16,668)	121,095	(13,582)	172,675
Other, net	9,910	3,585	12,246	(8,568)
Net cash provided by operating activities	12,426	287,503	138,984	489,794
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease (increase) in money market investments	1,672,896	(276,364)	1,592,408	352,523
Proceeds from maturities and paydowns of investment securities held-to-maturity	19,190	27,825	38,125	81,437
Purchases of investment securities held-to-maturity	(27,514)	(74,168)	(63,264)	(119,968)
Proceeds from sales, maturities, and paydowns of investment securities available-for-sale	194,973	259,273	1,042,261	618,496
Purchases of investment securities available-for-sale	(221,701)	(124,146)	(673,824)	(611,121)
Net loan and lease originations	(444,844)	(468,473)	(607,330)	(589,324)
Net purchases of premises and equipment	(35,815)	(26,733)	(112,731)	(42,533)
Proceeds from sales of other real estate owned	17,087	24,685	28,912	52,659
Payments for (Proceeds from) Other Investing Activities	1,380	12,646	6,997	20,034
Net cash provided by (used in) investing activities	1,175,652	(645,455)	1,251,554	(237,797)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in deposits	(861,472)	525,860	(691,266)	(1,117,018)
Net change in short-term funds borrowed	(21,436)	(70,154)	(81,947)	(96,007)
Proceeds from issuance of long-term debt	0	348,585	0	367,947
Repayments of long-term debt	(236,404)	(551,616)	(361,159)	(570,014)
Payments of Debt Extinguishment Costs	0	23,305	0	23,305
Proceeds from issuances of common and preferred stock	1,641	423,118	4,521	592,517
Dividends paid on common and preferred stock	(24,207)	(35,047)	(47,948)	(59,279)
Other, net	(3,388)	(5,209)	(3,691)	(5,648)
Net cash provided by (used in) financing activities	(1,145,266)	612,232	(1,181,490)	(910,807)
Net increase (decrease) in cash and due from banks	42,812	254,280	209,048	(658,810)
Cash and due from banks at beginning of period	1,341,319	928,817	1,175,083	1,841,907
Cash and due from banks at end of period	1,384,131	1,183,097	1,384,131	1,183,097
Cash paid for interest	40,820	41,782	81,669	103,913
Net cash paid for income taxes	$ 122,737	$ 120,438	$ 122,656	$ 124,003