Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating Activities:
Net income	$ 140,258	$ 145,240
Adjustments to reconcile net income to net cash from operating activities:
Provision for loan losses	37,689	11,035
Deferred tax expense (benefit)	(9,633)	(7,404)
Accretion of loan discount	(8,185)	(6,951)
Securities premium amortization (discount accretion), net	38,806	35,511
Net (gain) loss on securities transactions	(14,903)	(228)
Depreciation and amortization	23,823	20,175
Net (gain) loss on sale/write-down of assets/foreclosed assets	(596)	(845)
Stock-based compensation	5,477	5,337
Tax deficiency from stock-based compensation	(60)	(3)
Excess tax benefits from stock-based compensation	(125)	(753)
Earnings on life insurance policies	(1,745)	(1,814)
Net change in:
Trading account securities	177	(212)
Accrued interest receivable and other assets	(26,795)	(64,974)
Accrued interest payable and other liabilities	(4,474)	(17,811)
Net cash from operating activities	179,714	116,303
Investing Activities:
Securities held-to-maturity - Purchases	0	0
Securities held-to-maturity - Sales	135,610	0
Securities held to maturity: Maturities, calls and principal repayments	164,687	103,580
Securities available for sale:
Purchases	(1,514,263)	(931,021)
Sales	1,060,196	223,987
Maturities, calls and principal repayments	165,883	471,195
Proceeds from sale of loans	30,470	0
Net change in loans	(144,192)	(410,449)
Benefits received on life insurance policies	591	0
Proceeds from sales of premises and equipment	1,516	10
Purchases of premises and equipment	(23,459)	(96,805)
Proceeds from sales of repossessed properties	297	3,947
Net cash from investing activities	(122,664)	(635,556)
Financing Activities:
Net change in deposits	(56,144)	(294,776)
Net change in short-term borrowings	(160,362)	(210,755)
Proceeds from stock option exercises	3,586	8,950
Excess tax benefits from stock-based compensation	125	753
Purchase of treasury stock	0	(10,594)
Cash dividends – preferred stock	(4,031)	(4,031)
Cash dividends – common stock	(66,524)	(65,871)
Net cash from financing activities	(283,350)	(576,324)
Net change in cash and cash equivalents	(226,300)	(1,095,577)
Cash and equivalents at beginning of period	3,591,523	4,364,123
Cash and equivalents at end of period	$ 3,365,223	$ 3,268,546