Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
OPERATING ACTIVITIES:
Net income		$ 256,894	$ 251,016
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		10,255	17,927
Provision for depreciation and amortization		26,800	24,164
Amortization of investment security premiums, net		1,649	9,482
Investment securities (gains) losses, net (A)	[1]	(2,974)	(3,086)
Net (gains) losses on sales of loans held for sale		(988)	(422)
Originations of loans held for sale		(43,505)	(25,729)
Proceeds from sales of loans held for sale		45,453	24,210
Net (increase) decrease in trading debt securities, excluding unsettled transactions		(13,589)	17,915
Purchase of interest rate floor		0	(25,900)
Stock-based compensation		8,451	8,277
(Increase) decrease in interest receivable		2,794	(667)
Increase (decrease) in interest payable		(2,303)	31,819
Increase (decrease) in income taxes payable		528	(74)
Other changes, net		(6,630)	(108,044)
Net cash provided by (used in) operating activities		282,835	220,888
INVESTING ACTIVITIES:
Cash Paid in Acquisition, Net of Cash Received		0	(6,197)
Distributions received from equity-method investment		0	1,434
Proceeds from sales of investment securities (A)	[1]	1,157,176	1,130,536
Proceeds from maturities/pay downs of investment securities (A)	[1]	1,166,452	922,759
Purchases of investment securities (A)	[1]	(1,100,450)	(190,253)
Net (increase) decrease in loans		23,692	(666,743)
Securities purchased under agreements to resell		(350,000)	0
Repayments of securities purchased under agreements to resell		325,000	0
Purchases of premises and equipment		(19,504)	(51,904)
Sales of premises and equipment		3,281	1,215
Net cash provided by (used in) investing activities		1,205,647	1,140,847
FINANCING ACTIVITIES:
Net increase (decrease) in non-interest bearing, savings, interest checking and money market deposits		(669,259)	(2,506,872)
Net increase (decrease) in certificates of deposit		(456,891)	2,257,518
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase		(357,416)	36,287
Proceeds from FHLBank Borrowings, Financing Activities		0	2,250,000
Payments of FHLBank Borrowings, Financing Activities		0	(1,250,000)
Net increase (decrease) in other borrowings		2,580	(4,059)
Purchases of treasury stock		(79,889)	(36,563)
Cash dividends paid on common stock		(70,100)	(67,503)
Net cash provided by (used in) financing activities		(1,630,975)	678,808
Increase (decrease) in cash, cash equivalents and restricted cash		(142,493)	2,040,543
Cash, cash equivalents and restricted cash at beginning of year		2,687,283	897,801
Cash, cash equivalents and restricted cash at June 30		2,544,790	2,938,344
Supplemental Cash Flow Information:
Income tax payments, net		65,890	64,925
Interest paid on deposits and borrowings		219,139	124,540
Loans transferred to foreclosed real estate		$ 88	$ 72

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