Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 144,824	$ 164,024
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	31,186	39,498
Accretion of discount and amortization of premiums, net	(4,519)	(4,414)
Stock compensation costs	7,209	7,444
Deferred income tax expense (benefit)	28	(406)
Provision for credit losses	73,870	22,579
Net gains on sales of loans	(950)	(915)
Net gains on sales of AFS debt securities	(1,529)	(1,561)
Net loss on sales of fixed assets	3	0
Loans held-for-sale:
Originations and purchases	(5,802)	(2,167)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale	4,657	2,454
Proceeds from distributions received from equity method investees	973	1,150
Net change in accrued interest receivable and other assets	(462,766)	(27,639)
Net change in accrued expenses and other liabilities	304,680	(60,806)
Other net operating activities	(161)	0
Total adjustments	(53,121)	(24,783)
Net cash provided by operating activities	91,703	139,241
Net (increase) decrease in:
Investments in qualified affordable housing partnerships, tax credit and other investments	(27,581)	(33,261)
Interest-bearing deposits with banks	(115,419)	245,375
Resale agreements:
Proceeds from paydowns and maturities	250,000	0
AFS debt securities:
Proceeds from sales	306,463	151,339
Proceeds from repayments, maturities and redemptions	308,620	55,712
Purchases	(987,130)	(69,805)
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment	110,945	92,887
Purchases	(133,185)	(147,938)
Other changes in loans held-for-investment, net	(1,116,358)	(409,930)
Premises and equipment:
Purchases	(916)	(3,336)
Proceeds from sales of other real estate owned (“OREO”)	295	0
Proceeds from distributions received from equity method investees	374	1,005
Other net investing activities	(1,438)	(729)
Net cash used in investing activities	(1,405,330)	(118,681)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	1,374,287	800,053
Net increase (decrease) in short-term borrowings	39,962	(19,514)
FHLB advances:
Proceeds	0	300,000
Repayment	(99,999)	(282,000)
Repayment of long-term debt and lease liabilities	(289)	(217)
Common stock:
Repurchase of common stock pursuant to the Stock Repurchase Program	(145,966)	0
Stocks tendered for payment of withholding taxes	(7,609)	(14,036)
Cash dividends paid	(41,358)	(34,916)
Net cash provided by financing activities	1,119,028	749,370
Effect of exchange rate changes on cash and cash equivalents	13,492	14,018
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(181,107)	783,948
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,261,149	3,001,377
CASH AND CASH EQUIVALENTS, END OF PERIOD	3,080,042	3,785,325
Cash paid during the period for:
Interest	88,520	97,930
Income taxes, net	2,904	303
Noncash investing and financing activities:
Loans transferred from held-for-investment to held-for-sale	110,223	92,228
Loans transferred to OREO	$ 19,504	$ 0