CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 322,439	$ 237,652
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,567	26,555
Amortization of premiums and accretion of discount, net	(4,497)	11,824
Stock compensation costs	11,075	8,433
Deferred income tax expense (benefit)	609	(7,083)
Provision for credit losses	20,000	8,000
Net losses (gains) on sales of loans	22	(2,922)
Net realized losses (gains) on AFS debt securities	10,000	(1,278)
Loans held-for-sale:
Originations and purchases	0	(447)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale	0	461
Proceeds from distributions received from equity method investees	1,718	3,227
Net change in accrued interest receivable and other assets	(75,163)	(81,628)
Net change in accrued expenses and other liabilities	(93,948)	83,042
Other operating activities, net	(1,921)	49
Total adjustments	(99,538)	48,233
Net cash provided by operating activities	222,901	285,885
Net change in:
Investments in qualified affordable housing partnerships, tax credit and other investments	(27,358)	(32,853)
Interest-bearing deposits with banks	128,772	(79,633)
Resale agreements:
Proceeds from paydowns and maturities	150,629	554,932
Purchases	(12,725)	(158,251)
AFS debt securities:
Proceeds from sales	0	103,945
Proceeds from repayments, maturities and redemptions	321,913	446,301
Purchases	(532,758)	(746,855)
HTM debt securities:
Proceeds from repayments, maturities and redemptions	12,387	15,448
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment	179,237	135,517
Purchases	(155,016)	(225,065)
Other changes in loans held-for-investment, net	(695,646)	(1,697,590)
Proceeds from sales of other real estate owned (“OREO”) and other foreclosed assets	1,976	760
Proceeds from distributions received from equity method investees	2,244	4,348
Other investing activities, net	(6,501)	(3,518)
Net cash used in investing activities	(632,846)	(1,682,514)
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	(1,246,189)	1,584,344
Net change in short-term borrowings	4,500,017	(31)
FHLB advances:
Proceeds	6,000,000	100
Repayment	(6,000,000)	(175,100)
Repurchase agreements:
Repayment of repurchase agreements	300,000	0
Repurchase agreements’ extinguishment cost	3,872	0
Long-term debt and lease liabilities:
Repayment of long-term debt and lease liabilities	(203)	(229)
Common stock:
Stock tendered for payment of withholding taxes	(21,791)	(18,597)
Cash dividends paid	(70,776)	(58,900)
Net cash provided by financing activities	2,857,186	1,331,587
Effect of exchange rate changes on cash and cash equivalents	5,169	807
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	2,452,410	(64,235)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,481,784	3,912,935
CASH AND CASH EQUIVALENTS, END OF PERIOD	5,934,194	3,848,700
Cash paid during the period for:
Interest	227,504	20,881
Income taxes, net	0	581
Noncash investing and financing activities:
Securities transferred from AFS to HTM debt securities	0	3,010,003
Loans transferred from held-for-investment to held-for-sale	$ 160,476	$ 133,217