Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES
Net income	$ 48,916	$ 99,491
Adjustments to reconcile net income to cash provided by operating activities:
Provision for loan and lease losses	(9,202)	(31,848)
Deferred tax expense (benefit)	(2,744)	2,360
Change in current taxes payable	5,973	(20,649)
Depreciation	35,455	35,545
Change in accrued interest payable	560	(145)
Change in income earned not collected	(629)	2,099
Gain on sale of other assets	0	(4,085)
Origination of loans held for sale	(123,144)	(223,128)
Proceeds from sale of loans held for sale	123,967	254,087
Gain on sale of loans	(2,220)	(7,123)
Loss on sale of other real estate	6,993	1,480
Net amortization of premiums and discounts	(18,172)	(74,175)
FDIC receivable for loss share agreements	17,121	20,464
FDIC payable for loss share agreements	4,903	95
Net change in other assets	(31,249)	68,587
Net change in other liabilities	35,033	21,365
Net cash provided by operating activities	91,561	144,420
INVESTING ACTIVITIES
Net change in loans outstanding	(57,271)	325,057
Purchases of investment securities available for sale	(1,409,878)	(1,375,766)
Proceeds from maturities of investment securities held to maturity	214	212
Proceeds from maturities of investment securities available for sale	1,529,687	1,365,287
Net change in overnight investments	(259,150)	(596,745)
Cash received from the FDIC for loss share agreements	(4,350)	46,534
Proceeds from sale of other real estate	38,370	80,010
Additions to premises and equipment	(39,550)	(26,696)
Business acquisition, net of cash acquired	18,194	0
Net cash (used) provided by investing activities	(183,734)	(182,107)
FINANCING ACTIVITIES
Net change in time deposits	(219,297)	(390,329)
Net change in demand and other interest-bearing deposits	270,118	322,319
Net change in short-term borrowings	81,716	13,432
Repayment of long-term obligations	(1,240)	(1,608)
Repurchase of common stock	0	(321)
Cash dividends paid	(5,771)	(2,891)
Net cash provided (used) by financing activities	125,526	(59,398)
Change in cash and due from banks	33,353	(97,085)
Cash and due from banks at beginning of period	533,599	639,730
Cash and due from banks at end of period	566,952	542,645
CASH PAYMENTS FOR:
Interest	23,516	30,265
Income taxes	47,962	75,917
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Transfers of loans to other real estate	25,080	57,175
Dividends declared but not paid	2,886	2,886
Reclassification of Long-Term Obligations to Short-Term Borrowings	$ 195,000	$ 0