Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES:
Net income		$ 534,401	$ 485,177	$ 500,020
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		32,903	35,451	28,071
Provision for depreciation and amortization		54,076	49,513	46,856
Amortization of investment security premiums, net		(839)	17,666	18,805
Deferred income tax (benefit) expense		(591)	(7,399)	21,716
Investment securities (gains) losses, net	[1]	(7,823)	(14,985)	(20,506)
Net gains on sales of loans held for sale		(2,326)	(1,026)	(2,660)
Proceeds from sales of loans held for sale		107,456	58,946	123,656
Origination Of Loans Held For Sale		(104,974)	(57,424)	(118,850)
Net (increase) decrease in trading securities		(18,466)	28,478	4,152
Purchase of interest rate floor			(54,449)	(35,799)
Stock-based compensation		17,031	17,052	16,995
(Increase) decrease in interest receivable		(5,362)	(5,986)	(28,439)
Increase (decrease) in interest payable		(23,856)	46,650	3,054
Increase (decrease) in income taxes payable		12,215	4,586	(12,936)
Other changes, net		(15,986)	(113,481)	15,250
Net cash provided by (used in) operating activities		577,859	488,769	559,385
INVESTING ACTIVITIES
Payments to Acquire Businesses, Net of Cash Acquired		0	(6,365)	0
Proceeds from Equity Method Investment, Distribution, Return of Capital		0	1,434	400
Proceeds from sales of investment securities	[1]	1,295,587	1,141,949	106,971
Proceeds from maturities/pay downs of investment securities	[1]	2,133,113	1,935,552	2,691,260
Purchases of investment securities	[1]	(2,677,996)	(246,286)	(2,147,862)
Net (increase) decrease in loans		(54,675)	(933,736)	(1,146,292)
Securities purchased under agreements to resell		(500,000)	0	(200,000)
Repayments of securities purchased under agreements to resell		325,000	375,000	1,000,000
Purchases of land, buildings and equipment		(46,133)	(88,074)	(65,191)
Sales of land, buildings and equipment		8,891	4,358	2,985
Net cash provided by (used in) investing activities		483,787	2,183,832	242,271
FINANCING ACTIVITIES
Net increase (decrease) in non-interest bearing, savings, interest checking and money market deposits		413,329	(2,612,412)	(3,254,081)
Net increase (decrease) in time open and C.D.’s		(487,286)	1,881,587	(448,511)
Net increase (decrease) in short-term federal funds purchased and securities sold under agreements to repurchase		17,943	67,081	(181,233)
FHLB short-term borrowings		0	2,250,000	0
Repayments of FHLB borrowings		0	(2,250,000)	0
Net increase (decrease) in other borrowings		(1,348)	(8,268)	(2,888)
Purchases of treasury stock		(170,470)	(76,370)	(186,622)
Cash dividends paid on common stock and distributions to non-controlling interest		(145,093)	(134,734)	(127,466)
Other, net		(12)	(3)	(8)
Net cash provided by (used in) financing activities		(372,937)	(883,119)	(4,200,809)
Increase (decrease) in cash and cash equivalents		688,709	1,789,482	(3,399,153)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Year		2,687,283	897,801	4,296,954
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Year		3,375,992	2,687,283	897,801
Supplemental Cash Flow Information:
Income tax payments, net		126,129	130,957	116,995
Interest paid on deposits and borrowings		453,167	336,512	53,740
Loans transferred to foreclosed real estate		$ 1,184	$ 322	$ 457

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