Consolidated Statement of Cash Flows - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 204,994	$ 144,824
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	37,490	31,186
Amortization of premiums and accretion of discount , net	5,770	(4,519)
Stock compensation costs	7,817	7,209
Deferred income tax benefit	224	28
Provision for credit losses	0	73,870
Net gains on sales of loans	(1,781)	(950)
Gains on sales of AFS debt securities	(192)	(1,529)
Loans held-for-sale:
Originations and purchases	(5,718)	(5,802)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale	7,644	4,657
Proceeds from distributions received from equity method investees	2,505	973
Net change in accrued interest receivable and other assets	185,677	(462,766)
Net change in accrued expenses and other liabilities	(72,935)	304,680
Other net operating activities	20	(158)
Total adjustments	166,521	(53,121)
Net cash provided by operating activities	371,515	91,703
CASH FLOWS FROM INVESTING ACTIVITIES
Investments in qualified affordable housing partnerships, tax credit and other investments	(52,756)	(27,581)
Interest-bearing deposits with banks	29,000	(115,419)
Resale agreements:
Proceeds from paydowns and maturities	223,952	250,000
Purchases	(923,990)	0
AFS debt securities:
Proceeds from sales	46,397	306,463
Proceeds from repayments, maturities and redemptions	473,808	308,620
Purchases	(2,969,640)	(987,130)
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment	147,115	110,945
Purchases	(311,030)	(133,185)
Other changes in loans held-for-investment, net	(1,046,727)	(1,116,358)
Purchases of premises and equipment	(1,563)	(916)
Proceeds from distributions received from equity method investees	2,832	374
Other net investing activities	(1,307)	(1,143)
Net cash used in investing activities	(4,383,909)	(1,405,330)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	4,559,929	1,374,287
Net increase (decrease) in short-term borrowings	(21,143)	39,962
Repayment of FHLB advances	0	(99,999)
Repayment of long-term debt and lease liabilities	(315)	(289)
Common stock:
Repurchase of common stocks pursuant to the Stock Repurchase Program	0	(145,966)
Stocks tendered for payment of withholding taxes	(14,983)	(7,609)
Cash dividends paid	(48,213)	(41,358)
Net cash provided by financing activities	4,475,275	1,119,028
Effect of exchange rate changes on cash and cash equivalents	138,281	13,492
NET INCREASE IN CASH AND CASH EQUIVALENTS	601,162	(181,107)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	4,017,971	3,261,149
CASH AND CASH EQUIVALENTS, END OF PERIOD	4,619,133	3,080,042
Cash paid during the period for:
Interest	29,680	88,520
Income taxes, net	0	2,904
Noncash investing and financing activities:
Loans transferred from held-for-investment to held-for-sale	145,872	110,223
Loans transferred to other real estate owned (“OREO”) and other nonperforming assets	$ 10,360	$ 23,394