CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 436,395	$ 446,748
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	190,840	129,946
Goodwill impairment losses	0	23,000
Amortization of intangibles	2,233	2,385
Depreciation and amortization of premises and equipment	46,720	43,180
Net accretion of discounts and amortization of premiums and deferred fees	(196,221)	(22,495)
Interest capitalized on loans subject to the temporary payment moratorium or loss mitigation alternatives	(5,933)	(7,956)
Share-based compensation	17,853	15,079
Fair value adjustments on mortgage servicing rights	10,280	11,135
Adjustments to indemnity reserves on loans sold	(783)	31
Earnings from investments under the equity method, net of dividends or distributions	(12,723)	(17,387)
Deferred income tax expense (benefit)	19,247	(13,539)
(Gain) loss on:
Disposition of premises and equipment and other productive assets	(7,651)	(9,744)
Proceeds from insurance claims	0	(145)
Sale of loans, including valuation adjustments on loans held-for-sale and mortgage banking activities	(396)	177
Sale of foreclosed assets, including write-downs	(13,590)	(18,137)
Acquisitions of loans held-for-sale	(5,810)	(6,678)
Proceeds from sale of loans held-for-sale	28,697	35,286
Net originations on loans held-for-sale	(31,284)	(60,285)
Net decrease (increase) in:
Trading debt securities	10,445	29,415
Equity securities	(7,337)	(7,481)
Accrued income receivable	6,032	(17,638)
Other assets	15,425	(981)
Net (decrease) increase in:
Interest payable	(4,785)	8,009
Pension and other postretirement benefits obligation	5,937	11,985
Other liabilities	(28,352)	(100,887)
Total adjustments	38,844	26,275
Net cash provided by operating activities	475,239	473,023
Cash flows from investing activities:
Net decrease (increase) in money market investments	469,042	(775,597)
Purchases of investment securities:
Available-for-sale	(24,469,345)	(12,665,449)
Held-to-maturity	0	(8,615)
Equity	(2,370)	(18,279)
Proceeds from calls, paydowns, maturities and redemptions of investment securities:
Available-for-sale	24,670,995	13,138,765
Held-to-maturity	508,511	308,129
Proceeds from sale of investment securities:
Equity	5,242	30,926
Net disbursements on loans	(833,899)	(1,609,387)
Proceeds from sale of loans	18,266	133,078
Acquisition of loan portfolios	(510,556)	(556,659)
Return of capital from equity method investments	279	249
Payments to acquire equity method investments	(1,250)	(1,500)
Acquisition of premises and equipment and other productive assets	(153,085)	(133,598)
Proceeds from insurance claims	0	145
Proceeds from sale of:
Premises and equipment and other productive assets	5,570	6,620
Foreclosed assets	82,986	84,446
Net cash used in investing activities	(209,614)	(2,066,726)
Net increase (decrease) in:
Deposits	46,924	2,085,956
Assets sold under agreements to repurchase	(36,024)	(55,538)
Other short-term borrowings	0	(365,000)
Payment of notes payable	(69,570)	(321,000)
Principal payments of finance leases	(2,717)	(3,557)
Proceeds from issuance of notes payable	0	437,411
Proceeds from issuance of common stock	5,271	4,716
Dividends paid	(135,495)	(119,715)
Net payments for repurchase of common stock	(59,556)	(414)
Payments related to tax witholding for share-based compensation	(6,367)	(4,077)
Net cash (used in) provided by financing activities	(257,534)	1,658,782
Net increase in cash and due from banks, and restricted cash	8,091	65,079
Cash and due from banks and restricted cash at beginning of period	427,575	476,159
Cash and due from banks and restricted cash at end of period	$ 435,666	$ 541,238