Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OPERATING ACTIVITIES:
Net income		$ 570,699	$ 534,401	$ 485,177
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		56,138	32,903	35,451
Provision for depreciation and amortization		56,501	54,076	49,513
Amortization of investment security premiums, net		(18,308)	(839)	17,666
Deferred income tax (benefit) expense		11,555	(591)	(7,399)
Investment securities (gains) losses, net	[1]	(3,660)	(7,823)	(14,985)
Net gains on sales of loans held for sale		(2,929)	(2,326)	(1,026)
Proceeds from sales of loans held for sale		129,670	107,456	58,946
Origination Of Loans Held For Sale		(128,743)	(104,974)	(57,424)
Net (increase) decrease in trading securities		(15,321)	(18,466)	28,478
Purchase of interest rate floor		0	0	(54,449)
Stock-based compensation		17,272	17,031	17,052
(Increase) decrease in interest receivable		(11,025)	(5,362)	(5,986)
Increase (decrease) in interest payable		8,681	(23,856)	46,650
Increase (decrease) in income taxes payable		(22,625)	12,215	4,586
Other changes, net		(2,769)	(15,986)	(113,481)
Net cash provided by (used in) operating activities		645,136	577,859	488,769
INVESTING ACTIVITIES
Payments to Acquire Businesses, Net of Cash Acquired		0	0	(6,365)
Proceeds from Equity Method Investment, Distribution, Return of Capital		0	0	1,434
Proceeds from sales of investment securities	[1]	85,956	1,295,587	1,141,949
Proceeds from maturities/pay downs of investment securities	[1]	1,774,612	2,133,113	1,935,552
Purchases of investment securities	[1]	(1,451,271)	(2,677,996)	(246,286)
Net (increase) decrease in loans		(594,019)	(54,675)	(933,736)
Securities purchased under agreements to resell		(350,000)	(500,000)	0
Repayments of securities purchased under agreements to resell		125,000	325,000	375,000
Purchases of land, buildings and equipment		(52,748)	(46,133)	(88,074)
Sales of land, buildings and equipment		100	8,891	4,358
Net cash provided by (used in) investing activities		(462,370)	483,787	2,183,832
FINANCING ACTIVITIES
Net increase (decrease) in non-interest bearing, savings, interest checking and money market deposits		273,085	413,329	(2,612,412)
Net increase (decrease) in time open and C.D.’s		(1,945)	(487,286)	1,881,587
Net increase (decrease) in short-term federal funds purchased and securities sold under agreements to repurchase		62,883	17,943	67,081
FHLB short-term borrowings		0	0	2,250,000
Repayments of FHLB borrowings		0	0	(2,250,000)
Net increase (decrease) in other borrowings		12,742	(1,348)	(8,268)
Purchases of treasury stock		(207,567)	(170,470)	(76,370)
Cash dividends paid on common stock and distributions to non-controlling interest		(150,237)	(145,093)	(134,734)
Other, net		(4)	(12)	(3)
Net cash provided by (used in) financing activities		(11,043)	(372,937)	(883,119)
Increase (decrease) in cash and cash equivalents		171,723	688,709	1,789,482
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Year		3,375,992	2,687,283	897,801
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Year		3,547,715	3,375,992	2,687,283
Supplemental Cash Flow Information:
Interest paid on deposits and borrowings		363,184	453,167	336,512
Loans transferred to foreclosed real estate		$ 2,172	$ 1,184	$ 322

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