CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating Activities
Net income	$ 109,390	$ 376,103
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for (reversal of) credit losses	80,384	71,035
Depreciation, amortization, and accretion, net	34,210	41,854
Deferred income tax expense (benefit)	8,958	19,194
Originations of loans held for sale	(2,628,732)	(311,902)
Proceeds from sales and payments on loans held for sale	2,547,048	603,486
Gain on sales of loans held for sale, net	(5,132)	(5,739)
(Increase) decrease in other assets	(234,360)	(151,774)
Increase (decrease) in other liabilities	120,137	59,529
Investment securities (gains) losses, net	256,660	(1,030)
Share-based compensation expense	15,621	16,951
Net gain on sales of other real estate and other assets held for sale	(899)	(3,231)
Other	0	(377)
Net cash provided by (used in) operating activities	303,285	714,099
Investing Activities
Net cash received (paid) for business combination and divestiture	0	8,009
Proceeds from maturities and principal collections of investment securities held to maturity	66,100	0
Proceeds from maturities and principal collections of investment securities available for sale	350,809	449,581
Proceeds from sales of investment securities available for sale	1,365,923	82,595
Purchases of investment securities available for sale	(1,876,434)	(440,014)
Net proceeds from sales of loans	8,853	84,132
Purchases of loans	0	(10,623)
Net (increase) decrease in loans	206,787	(1,183,701)
Net (purchases) redemptions of Federal Home Loan Bank stock	(16,650)	49,935
Net (purchases) redemptions of Federal Reserve Bank stock	(12,117)	(15,564)
Net proceeds from settlement (purchases) of bank-owned life insurance policies	1,564	3,360
Net increase in premises, equipment and software	(28,536)	(12,703)
Proceeds from sales of other real estate and other assets held for sale	24,787	6,976
Net cash provided by (used in) investing activities	91,086	(978,017)
Financing Activities
Net increase (decrease) in deposits	(544,612)	1,217,129
Net increase (decrease) in federal funds purchased and securities sold under repurchase agreements	(94,590)	(63,204)
Net increase (decrease) in other short-term borrowings	(960)	(601,923)
Repayments and redemption of long-term debt	(800,000)	(3,304,600)
Proceeds from long-term debt, net	1,150,000	3,220,912
Dividends paid to common shareholders	(111,372)	(104,967)
Dividends paid to preferred shareholders	(19,398)	(16,581)
Repurchases of common stock	(121,755)	0
Issuances, net of taxes paid, under equity compensation plans	(8,502)	(6,477)
Net cash provided by (used in) financing activities	(551,189)	340,289
Increase (decrease) in cash and cash equivalents including restricted cash	(156,818)	76,371
Cash, cash equivalents, and restricted cash, at beginning of period	2,451,426	1,977,780
Cash, cash equivalents, and restricted cash at end of period	2,294,608	2,054,151
Supplemental Disclosures:
Income taxes paid	28,961	57,988
Interest paid	730,439	478,101
Non-cash Activities
Loans foreclosed and transferred to other real estate	21,992	0
Investment securities transferred from available for sale to held to maturity	2,715,635	0
Settlement of acquired debt	$ 0	$ 31,109