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	$ 167,699		$ 134,348	$ 195,028
Adjustments to reconcile net income to cash provided by operating activities:
Provision for loan and lease losses	(32,255)		142,885	232,277
Deferred tax expense (benefit)	47,889		(35,265)	(16,637)
Change in current taxes payable	(79,173)		29,095	(2,820)
Depreciation	70,841		68,941	65,170
Change in accrued interest payable	(2,616)		(14,366)	(14,340)
Change in income earned not collected	(724)		(5,450)	48,423
Business Combination, Bargain Purchase, Gain Recognized, Amount	0		0	(150,417)
Gain on sale of other assets	(4,085)		0	0
Securities losses (gains)	0		(2,277)	288
Origination of loans held for sale	(393,908)		(575,705)	(513,253)
Proceeds from sale of loans held for sale	443,708		589,376	518,398
Gain on sale of loans	(10,738)		(7,465)	(8,751)
Loss on sale of other real estate	6,686		36,229	53,450
Gain on retirement of long-term obligations	0		0	(9,685)
Net amortization of premiums and discounts	(115,060)		(158,227)	(194,434)
FDIC receivable for loss share agreements	71,771		(7,181)	44,551
Net change in other assets	103,974		(17,617)	89,979
Net change in other liabilities	56,998		23,967	(1,541)
Net cash provided by operating activities	331,007		201,288	335,686
INVESTING ACTIVITIES
Net change in loans outstanding	323,436		627,806	473,974
Purchases of investment securities available for sale	(2,671,420)		(5,169,641)	(3,480,699)
Proceeds from maturities of investment securities held to maturity	435		480	709
Proceeds from maturities of investment securities available for sale	2,437,851		3,986,370	4,002,724
Proceeds from sales of investment securities available for sale	0		7,900	242,023
Net change in overnight investments	(416,144)		(8,205)	(36,585)
Cash received from the FDIC for loss share agreements	19,373		251,972	293,067
Proceeds from Sale of Other Real Estate	147,550		147,858	135,803
Additions to premises and equipment	(66,037)		(88,883)	(76,901)
Cash Acquired from Acquisition	0		0	1,150,879
Net cash (used) provided by investing activities	(224,956)		(244,343)	2,704,994
FINANCING ACTIVITIES
Net change in time deposits	(699,005)		(1,049,761)	(2,273,418)
Net change in demand and other interest-bearing deposits	487,046		1,558,512	4,417
Net change in short-term borrowings	(57,087)		(101,717)	(283,440)
Repayment of long-term obligations	(4,152)		(196,338)	(320,730)
Origination of long-term obligations	70,000		310	0
Repurchase of common stock	(321)		(103,624)	(24,387)
Cash dividends paid	(8,663)		(15,398)	(12,499)
Net cash provided (used) by financing activities	(212,182)		91,984	(2,910,057)
Change in cash and due from banks	(106,131)		48,929	130,623
Cash and due from banks at beginning of period	639,730		590,801	460,178
Cash and due from banks at end of period	533,599		639,730	590,801
CASH PAYMENTS FOR:
Interest	59,234		104,514	157,477
Income taxes	102,890		66,453	91,465
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Change in unrealized securities gains (losses)	(50,441)		7,244	3,370
Change in fair value of cash flow hedge	3,178		316	(1,222)
Change in pension obligation	140,752		(33,079)	(51,559)
Transfers of loans to other real estate	92,125		140,645	213,195
Dividends Declared but not Paid	2,885		0	0
Reclassification	7,368	[1]	0	0
Assets acquired	0		0	2,934,464
Liabilities assumed	0		0	2,784,047
Net assets acquired	$ 0		$ 0	$ 150,417

[1] Reclassification results from enhancements to the ALLL calculation during the second quarter of 2013 that resulted in the allocation of $15.8 million previously designated as 'nonspecific' to other loan classes and the absorption of $7.4 million of the reserve for unfunded commitments related to unfunded, revocable loan commitments into the ALLL. Further discussion is contained in Note A.