Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities:
Net income	$ 68,779	$ 72,163
Adjustments to reconcile net income to net cash from operating activities:
Provision for loan losses	28,500	8,162
Deferred tax expense (benefit)	(4,395)	(3,748)
Accretion of loan discount	(3,727)	(3,571)
Securities premium amortization (discount accretion), net	19,725	17,308
Net (gain) loss on securities transactions	(14,903)	(228)
Depreciation and amortization	11,912	10,034
Net (gain) loss on sale/write-down of assets/foreclosed assets	(632)	(779)
Stock-based compensation	2,482	2,562
Net tax benefit (deficiency) from stock-based compensation	(3)	(1)
Excess tax benefits from stock-based compensation	(41)	(75)
Earnings on life insurance policies	(867)	(886)
Net change in:
Trading account securities	(444)	(236)
Accrued interest receivable and other assets	29,418	(36,504)
Accrued interest payable and other liabilities	(5,714)	(9,423)
Net cash from operating activities	130,090	54,778
Investing Activities:
Securities held-to-maturity - Sales	135,610	0
Securities held to maturity: Maturities, calls and principal repayments	149,507	95,453
Securities available for sale:
Purchases	(813,955)	(772,500)
Sales	1,060,196	223,987
Maturities, calls and principal repayments	91,993	372,316
Net change in loans	(54,632)	(225,770)
Proceeds from sales of premises and equipment	1,513	0
Purchases of premises and equipment	(7,366)	(51,803)
Proceeds from sales of repossessed properties	57	2,901
Net cash from investing activities	562,923	(355,416)
Financing Activities:
Net change in deposits	(186,620)	13,692
Net change in short-term borrowings	(199,636)	(198,912)
Proceeds from stock option exercises	96	728
Excess tax benefits from stock-based compensation	41	75
Cash dividends – preferred stock	(2,016)	(2,016)
Cash dividends – common stock	(32,938)	(32,288)
Net cash from financing activities	(421,073)	(218,721)
Net change in cash and cash equivalents	271,940	(519,359)
Cash and equivalents at beginning of period	3,591,523	4,364,123
Cash and equivalents at end of period	$ 3,863,463	$ 3,844,764