CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 495,981	$ 429,736
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	48,911	70,402
Amortization of premiums and accretion of discount, net	21,519	11,310
Stock compensation costs	17,009	16,025
Deferred income tax (expense) benefit	(7,554)	2,571
Provision for (reversal of) credit losses	21,500	(15,000)
Net gains on sales of loans	(3,839)	(3,272)
Gains on sales of AFS debt securities	(1,306)	(824)
Loans held-for-sale:
Originations and purchases	(447)	(8,703)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale	461	10,353
Proceeds from distributions received from equity method investees	4,412	3,564
Net change in accrued interest receivable and other assets	(128,071)	(73,809)
Net change in accrued expenses and other liabilities	457,296	(44,113)
Other net operating activities	3,182	5,571
Total adjustments	433,073	(25,925)
Net cash provided by operating activities	929,054	403,811
CASH FLOWS FROM INVESTING ACTIVITIES
Investments in qualified affordable housing partnerships, tax credit and other investments	(49,545)	(92,780)
Interest-bearing deposits with banks	23,442	(20,534)
Resale agreements:
Proceeds from paydowns and maturities	1,162,172	506,353
Purchases	(231,463)	(1,345,537)
AFS debt securities:
Proceeds from sales	129,181	164,898
Proceeds from repayments, maturities and redemptions	613,244	877,123
Purchases	(767,015)	(4,015,212)
HTM debt securities:
Proceeds from repayments, maturities and redemptions	40,072	0
Purchases	(50,000)	0
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment	325,813	248,540
Purchases	(541,997)	(542,839)
Other changes in loans held-for-investment, net	(4,639,384)	(1,389,832)
Proceeds from distributions received from equity method investees	8,717	4,983
Other net investing activities	1,354	2,388
Net cash used in investing activities	(3,975,409)	(5,602,449)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	1,046,046	7,708,661
Net decrease in short-term borrowings	(49)	(21,143)
FHLB advances:
Proceeds	3,950,000	0
Repayment	(4,025,000)	(405,000)
Repurchase agreements:
Proceeds from repurchase agreements	311,785	0
Long-term debt and lease liabilities:
Repayment of long-term debt and lease liabilities	(457)	(613)
Common stock:
Repurchase of common stocks pursuant to the Stock Repurchase Program	(99,990)	0
Proceeds from issuance pursuant to various stock compensation plans and agreements	1,444	1,180
Stocks tendered for payment of withholding taxes	(18,977)	(15,254)
Cash dividends paid	(115,623)	(95,060)
Net cash provided by financing activities	1,049,179	7,172,771
Effect of exchange rate changes on cash and cash equivalents	(13,706)	5,701
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(2,010,882)	1,979,834
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,912,935	4,017,971
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,902,053	5,997,805
Cash paid during the period for:
Interest	45,057	52,228
Income taxes, net	188,510	114,202
Noncash investing and financing activities:
Securities transferred from AFS to HTM debt securities	3,010,003	0
Loans transferred from held-for-investment to held-for-sale	351,406	247,636
Loans transferred from held-for-sale to held-for-investment	631	0
Loans transferred to other real estate owned (“OREO”) and other foreclosed assets	$ 0	$ 13,025