Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
OPERATING ACTIVITIES
Net income	$ 121,388	$ 111,680
Adjustments to reconcile net income to cash provided by operating activities:
Provision (credit) for loan and lease losses	9,405	13,511
Deferred tax expense (benefit)	(8,501)	(23,762)
Net change in current taxes	(5,757)	(25,261)
Depreciation	44,476	44,312
Increase (decrease) in accrued interest payable	624	(2,359)
Net (increase) decrease in income earned not collected	(1,872)	(9,475)
Gain on acquisition	(4,994)	(42,930)
Securities (gains) losses	(17,157)	(5,273)
Loss on termination of FDIC loss share agreements	3,377	0
Origination of loans held for sale	(361,652)	(355,819)
Proceeds from sale of loans held for sale	342,505	338,466
Gain on sale of loans	(5,882)	(3,991)
Net writedowns/losses on other real estate	3,884	3,188
Net amortization of premiums and discounts	(23,859)	(45,662)
Amortization of intangible assets	11,135	8,302
FDIC receivable for loss share agreements	7,571	27,291
FDIC payable for loss share agreements	(14,001)	5,503
Net change in other assets	(25,924)	14,243
Net change in other liabilities	19,718	25,085
Net cash provided by operating activities	94,484	77,049
INVESTING ACTIVITIES
Net change in loans outstanding	(416,812)	(566,524)
Purchases of investment securities available for sale	(1,966,181)	(1,435,387)
Proceeds from maturities of investment securities held to maturity	99	167
Proceeds from maturities of investment securities available for sale	627,971	757,780
Proceeds from sales of investment securities available for sale	1,370,768	522,024
Net change in overnight investments	(173,134)	21,578
Proceeds from sales of loans	13,328	0
Cash (paid to) received from the FDIC for loss share agreements	(13,502)	(10,890)
Net Payment to the FDIC for Termination of Loss Share Agreements	(20,115)	0
Proceeds from sale of other real estate	16,010	47,391
Additions to premises and equipment	(29,617)	(31,921)
Business acquisition, net of cash acquired	27,943	123,137
Net cash (used) provided by investing activities	(563,242)	(572,645)
FINANCING ACTIVITIES
Net change in time deposits	(250,151)	(359,125)
Net change in demand and other interest-bearing deposits	421,082	926,092
Net change in short-term borrowings	132,167	(269,460)
Repayment of long-term obligations	(3,651)	(4,483)
Origination of long-term obligations	150,000	120,000
Cash dividends paid	(7,206)	(7,206)
Net cash provided (used) by financing activities	442,241	405,818
Change in cash and due from banks	(26,517)	(89,778)
Cash and due from banks at beginning of period	534,086	604,182
Cash and due from banks at end of period	507,569	514,404
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Transfers of loans to other real estate	21,280	30,350
Dividends Declared but not Paid	3,603	3,603
Unsettled sales of investment securities	$ 361,225	$ 0