Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
OPERATING ACTIVITIES:
Net income		$ 251,016	$ 240,179
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		17,927	(2,696)
Provision for depreciation and amortization		24,164	23,638
Amortization of investment security premiums, net		9,482	5,946
Investment securities (gains) losses, net (A)	[1]	(3,086)	(8,192)
Net (gains) losses on sales of loans held for sale		(422)	(1,944)
Originations of loans held for sale		(25,729)	(93,439)
Proceeds from sales of loans held for sale		24,210	96,282
Net (increase) decrease in trading debt securities, excluding unsettled transactions		17,915	870
Purchase of interest rate floor		(25,900)
Stock-based compensation		8,277	8,409
(Increase) decrease in interest receivable		(667)	(11,739)
Increase (decrease) in interest payable		31,819	247
Increase (decrease) in income taxes payable		(74)	(1,855)
Other changes, net		(108,044)	30,464
Net cash provided by (used in) operating activities		220,888	286,170
INVESTING ACTIVITIES:
Payments to Acquire Businesses, Net of Cash Acquired		(6,197)	0
Distributions received from equity-method investment		1,434	400
Cash proceeds from sales of investment securities	[1]	1,130,536	3,712
Proceeds from maturities/pay downs of investment securities (A)	[1]	922,759	1,462,151
Purchases of investment securities (A)	[1]	(190,253)	(1,894,221)
Net (increase) decrease in loans		(666,743)	(518,899)
Securities purchased under agreements to resell		0	(200,000)
Repayments of securities purchased under agreements to resell		0	375,000
Purchases of premises and equipment		(51,904)	(28,985)
Sales of premises and equipment		1,215	1,401
Net cash provided by (used in) investing activities		1,140,847	(799,441)
FINANCING ACTIVITIES:
Net increase (decrease) in non-interest bearing, savings, interest checking and money market deposits		(2,506,872)	(1,302,692)
Net increase (decrease) in certificates of deposit		2,257,518	(437,030)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase		36,287	(788,671)
Proceeds from FHLBank Borrowings, Financing Activities		2,250,000	0
Payments of FHLBank Borrowings, Financing Activities		(1,250,000)	0
Net increase (decrease) in other borrowings		(4,059)	(6,535)
Purchases of treasury stock		(36,563)	(113,205)
Issuance of stock under equity compensation plans		0	448
Cash dividends paid on common stock		(67,503)	(64,078)
Net cash provided by (used in) financing activities		678,808	(2,711,763)
Increase (decrease) in cash, cash equivalents and restricted cash		2,040,543	(3,225,034)
Cash, cash equivalents and restricted cash at beginning of year		897,801	4,296,954
Cash, cash equivalents and restricted cash at June 30		2,938,344	1,071,920
Supplemental Cash Flow Information:
Income tax payments, net		64,925	62,588
Interest paid on deposits and borrowings		124,540	8,518
Loans transferred to foreclosed real estate		$ 72	$ 25

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