CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities
Net income	$ 60,152	$ 176,554	$ 161,827
Adjustments to net income:
Provision for credit losses on loans and leases, excluding covered loans	2,000		3,000
Provision for losses on covered loans	18,089	461	38,848
Amortization of intangibles	1,932	5,795	5,336
Depreciation and amortization	8,324	24,248	23,765
Share-based employee compensation expense		16,283	13,694
Deferred income tax (benefit) expense		(1,888)	926
Gain on disposal of assets	(3,199)	(5,155)	(8,401)
Gain on sale of securities	(856)	(12,624)	(1,026)
Impairment loss on securities	39	326	217
Other, net		24,759	(29,115)
Net change in:
Trading securities		64,772	(2,187)
Other assets and other liabilities, net		81,814	75,109
Net cash provided by operating activities		375,345	281,993
Cash Flows From Investing Activities
Purchase of securities available-for-sale		(1,775,702)	(2,997,503)
Sales of securities available-for-sale	1,000	1,835,775	6,216
Maturities and paydowns of securities available-for-sale		2,064,288	2,699,482
Purchase of securities held-to-maturity		(277,199)	(728,064)
Maturities and paydowns of securities held-to-maturity		23,826	20,124
Loan originations, net of principal collections		(1,436,714)	(779,081)
Net payments for premises and equipment		(43,415)	(23,039)
Net cash paid in acquisitions			(123,746)
Other investing activities, net		48,429	23,976
Net cash provided by (used in) investing activities		439,288	(1,901,635)
Cash Flows From Financing Activities
Net increase in deposits		1,734,514	2,124,734
Net decrease in federal funds purchased		(1,214,200)	(50,000)
Issuance of long-term debt		35,289	159,986
Repayment of long-term debt		(231,382)	(252,221)
Proceeds from exercise of stock options		24,963	21,653
Tax benefit from exercise of stock options		3,749	2,959
Cash dividends paid		(34,355)	(40,029)
Other financing activities, net		(1,902)	(2,416)
Net cash provided by financing activities		316,676	1,964,666
Net increase in cash and cash equivalents		1,131,309	345,024
Cash and cash equivalents at beginning of year		415,405	244,814
Cash and cash equivalents at end of period	589,838	1,546,714	589,838
Cash paid during the period for:
Interest		56,100	47,903
Income taxes		11,478	53,783
Non-cash investing activities:
Transfer of loans to other real estate owned		18,637	58,202
Transfer of SERP liability to equity			8,348
Assets acquired (liabilities assumed) in acquisitions:
Loans and leases	318,301		318,301
Other borrowings	$ (320,856)		$ (320,856)