Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
OPERATING ACTIVITIES:
Net income		$ 144,371	$ 130,633
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		10,960	14,487
Provision for depreciation and amortization		21,006	13,721
Accretion of discount related to acquired loans		(6,913)	0
Amortization (accretion) of investment security premiums (discounts), net		(1,785)	(3,724)
Investment securities (gains) losses, net (A)		(11,647)	7,591
Net (gains) losses on sales of loans held for sale		(842)	(515)
Originations of loans held for sale		(34,175)	(22,626)
Proceeds from sales of loans held for sale		36,933	23,357
Net (increase) decrease in trading debt securities, excluding unsettled transactions		549,443	(21,277)
Stock-based compensation		6,142	4,426
(Increase) decrease in interest receivable		12,132	5,149
Increase (decrease) in interest payable		(2,323)	5,432
Increase (decrease) in income taxes payable		37,600	35,134
Other changes, net		(76,107)	(53,184)
Net cash provided by (used in) operating activities		684,795	138,604
INVESTING ACTIVITIES:
Cash Paid in Acquisition, Net of Cash Received		501,360	0
Proceeds from sales of investment securities (A)	[1]	17,662	6,757
Proceeds from maturities/pay downs of investment securities (A)	[1]	450,272	542,456
Purchases of investment securities (A)	[1]	(39,012)	(514,579)
Net (increase) decrease in loans		(67,168)	(170,573)
Securities purchased under agreements to resell		0	(350,000)
Repayments of securities purchased under agreements to resell		0	125,000
Purchases of premises and equipment		(6,371)	(12,586)
Sales of premises and equipment		2,471	100
Net cash provided by (used in) investing activities		859,214	(373,425)
FINANCING ACTIVITIES:
Net increase (decrease) in non-interest bearing, savings, interest checking and money market deposits		(199,629)	774,974
Net increase (decrease) in certificates of deposit		(88,024)	(40,133)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase		(475,936)	(526,722)
Proceeds from FHLBank Borrowings, Financing Activities		250,000	0
Payments of FHLBank Borrowings, Financing Activities		(603,929)	0
Net increase (decrease) in other borrowings		(4,753)	17,687
Purchases of treasury stock		(84,260)	(55,184)
Payments of Dividends		(41,875)	(37,886)
Proceeds from (Payment for) Other Financing Activity		(1)	(2)
Net cash provided by (used in) financing activities		(1,248,407)	132,734
Increase (decrease) in cash, cash equivalents and restricted cash		295,602	(102,087)
Cash, cash equivalents and restricted cash at beginning of year		3,547,715	3,375,992
Cash, cash equivalents and restricted cash at March 31		3,843,317	3,273,905
Supplemental Cash Flow Information:
Cash, cash equivalents and restricted cash at March 31		3,843,317	3,273,905
Income tax payments, net		564	562
Interest paid on deposits and borrowings		98,990	89,831
Loans transferred to foreclosed real estate		0	449
Fair Value of Assets Acquired		3,327,074	0
Indefinite-Lived Intangible Assets Acquired		246,068	0
Liabilities Assumed		3,549,295	0
Stock Issued During Period, Value, Acquisitions		519,865	0
Restricted Cash and Cash Equivalent		$ 53	$ 52

[1] (A) Available for sale debt securities, equity securities, and other securities.