Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
OPERATING ACTIVITIES
Net income	$ 167,638	$ 75,666
Adjustments to reconcile net income to cash provided by operating activities:
Provision (credit) for loan and lease losses	13,618	(7,665)
Deferred tax expense (benefit)	(3,941)	(24,374)
Net change in current taxes	(26,195)	(24,716)
Depreciation	65,559	53,249
Increase (decrease) in accrued interest payable	(2,244)	(1,434)
Net (increase) decrease in income earned not collected	(10,114)	(121)
Gain on acquisition	(42,930)	0
Securities (gains) losses	(10,837)	0
Origination of loans held for sale	(542,836)	(198,134)
Proceeds from sale of loans held for sale	540,737	206,310
Gain on sale of loans	(6,079)	(3,334)
Net writedowns/losses on other real estate	4,355	9,770
Net amortization of premiums and discounts	(70,150)	(33,917)
Amortization of intangible assets	11,765	1,737
FDIC receivable for loss share agreements	35,395	16,708
FDIC payable for loss share agreements	7,503	7,546
Net change in other assets	29,225	(37,077)
Net change in other liabilities	37,077	27,327
Net cash provided by operating activities	197,546	67,541
INVESTING ACTIVITIES
Net change in loans outstanding	(928,132)	(329,925)
Purchases of investment securities available for sale	(1,887,604)	(1,999,666)
Proceeds from maturities of investment securities held to maturity	217	300
Proceeds from maturities of investment securities available for sale	1,139,053	1,993,051
Proceeds from sales of investment securities available for sale	1,036,254	0
Net change in overnight investments	(643,213)	151,972
Proceeds from sales of loans	45,862	0
Cash (paid to) received from the FDIC for loss share agreements	(24,805)	(5,479)
Proceeds from sale of other real estate	63,446	55,478
Additions to premises and equipment	(55,575)	(65,763)
Business acquisition, net of cash acquired	123,137	18,194
Net cash (used) provided by investing activities	(1,131,360)	(181,838)
FINANCING ACTIVITIES
Net change in time deposits	(405,160)	(301,849)
Net change in demand and other interest-bearing deposits	1,179,606	202,853
Net change in short-term borrowings	(232,928)	91,345
Repayment of long-term obligations	(4,633)	(2,001)
Origination of long-term obligations	350,000	0
Cash dividends paid	(10,809)	(8,657)
Net cash provided (used) by financing activities	876,076	(18,309)
Change in cash and due from banks	(57,738)	(132,606)
Cash and due from banks at beginning of period	604,182	533,599
Cash and due from banks at end of period	546,444	400,993
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Transfers of loans to other real estate	44,065	42,136
Dividends Declared but not Paid	3,603	2,886
Unsettled sales of investment securities	$ 236,617	$ 0