CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Activities
Net income	$ 202,159	$ 171,037
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for (reversal of) credit losses	32,154	11,400
Depreciation, amortization, and accretion, net	20,088	18,425
Deferred income tax expense (benefit)	706	1,250
Originations of loans held for sale	(143,149)	(915,873)
Proceeds from sales and payments on loans held for sale	275,274	946,187
Gain on sales of loans held for sale, net	(2,716)	(4,647)
(Increase) decrease in other assets	(63,174)	(50,025)
Increase (decrease) in other liabilities	25,417	(5,433)
Investment securities (gains) losses, net	(1,030)	0
Share-based compensation expense	8,711	8,334
Other	0	677
Net cash provided by (used in) operating activities	354,440	181,332
Investing Activities
Proceeds from maturities and principal collections of investment securities available for sale	205,098	642,957
Proceeds from sales of investment securities available for sale	82,595	0
Purchases of investment securities available for sale	(193,009)	(820,120)
Proceeds from sales of loans	1,505	39,568
Purchases of loans	0	(181,335)
Net (increase) decrease in loans	(773,103)	(726,686)
Net (purchases) redemptions of Federal Home Loan Bank stock	(7,439)	(13,827)
Net (purchases) redemptions of Federal Reserve Bank stock	(7,108)	(424)
Net proceeds from settlement (purchases) of bank-owned life insurance policies	2,514	0
Net increase in premises, equipment and software	(6,519)	(2,662)
Other	3,015	28,464
Net cash provided by (used in) investing activities	(692,451)	(1,034,065)
Financing Activities
Net increase (decrease) in deposits	1,070,206	(771,032)
Net increase (decrease) in federal funds purchased and securities sold under repurchase agreements	49,107	236,991
Net increase (decrease) in other short-term borrowings	(350,232)	400,192
Repayments and redemption of long-term debt	0	(400,000)
Proceeds from long-term debt, net	1,020,912	0
Dividends paid to common shareholders	(49,465)	(47,851)
Dividends paid to preferred shareholders	(8,291)	(8,291)
Repurchases of common stock	0	(9,671)
Issuances, net of taxes paid, under equity compensation plans	(6,606)	(3,955)
Net cash provided by (used in) financing activities	1,725,631	(603,617)
Increase (decrease) in cash and cash equivalents including restricted cash	1,387,620	(1,456,350)
Cash, cash equivalents, and restricted cash, at beginning of period	1,977,780	3,009,853
Cash, cash equivalents, and restricted cash at end of period	3,365,400	1,553,503
Supplemental Disclosures:
Income taxes paid	52,157	46,493
Interest paid	206,624	27,278
Non-cash Activities
Loans transferred (from) to other loans held for sale	$ 424,104	$ (1,055)