Consolidated Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 314,404	$ 359,381
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	72,113	62,329
Accretion of discount and amortization of premiums, net	(9,817)	(9,910)
Stock compensation costs	15,525	13,215
Deferred income tax (benefit) expense	(2,110)	1,320
Provision for credit losses	41,824	35,754
Net gains on sales of loans	(930)	(3,936)
Net gains on sales of available-for-sale investment securities	(3,008)	(2,339)
Net gains on sales of fixed assets	0	(2,200)
Net gain on sale of business	0	(31,470)
Loans held-for-sale:
Originations and purchases	(3,339)	(11,547)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale	3,632	10,759
Proceeds from distributions received from equity method investees	1,538	1,814
Net change in accrued interest receivable and other assets	(150,154)	(32,226)
Net change in accrued expenses and other liabilities	10,320	44,016
Other net operating activities	3	(93)
Total adjustments	(24,403)	75,486
Net cash provided by operating activities	290,001	434,867
Net (increase) decrease in:
Investments in qualified affordable housing partnerships, tax credit and other investments	(61,555)	(41,444)
Interest-bearing deposits with banks	222,387	28,525
Resale agreements:
Proceeds from paydowns and maturities	50,000	175,000
Purchases	(25,000)	(100,000)
Available-for-sale investment securities:
Proceeds from sales	375,102	256,875
Proceeds from repayments, maturities and redemptions	117,325	211,303
Purchases	(316,740)	(235,360)
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment	170,174	274,785
Purchases	(326,456)	(389,912)
Other changes in loans held-for-investment, net	(1,196,094)	(1,147,156)
Premises and equipment:
Purchases	(4,414)	(7,612)
Payment on sale of business, net of cash transferred	0	(503,687)
Proceeds from sales of other real estate owned (“OREO”)	0	3,595
Proceeds from distributions received from equity method investees	3,636	1,725
Other net investing activities	(5,516)	(2,200)
Net cash used in investing activities	(997,151)	(1,475,563)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	1,035,650	1,195,796
Net (decrease) increase in short-term borrowings	(38,107)	59,895
Proceeds	1,500,000	0
Repayment	(1,082,000)	0
Repayments of finance lease liabilities	(435)
Repayment of long-term debt		(10,000)
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements	1,894	1,328
Stock tendered for payment of withholding taxes	(14,169)	(15,161)
Cash dividends paid	(74,949)	(59,243)
Net cash provided by financing activities	1,327,884	1,172,615
Effect of exchange rate changes on cash and cash equivalents	(497)	(9,040)
NET INCREASE IN CASH AND CASH EQUIVALENTS	620,237	122,879
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,001,377	2,174,592
CASH AND CASH EQUIVALENTS, END OF PERIOD	3,621,614	2,297,471
Cash paid during the period for:
Interest	203,577	99,176
Income taxes, net	76,153	67,431
Noncash investing and financing activities:
Loans transferred from held-for-investment to held-for-sale	$ 173,394	$ 285,631