Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets
AFS investment securities, at fair value	$ 3,912,730	$ 3,600,892
HTM investment securities, net, at amortized cost	3,799,035	3,860,160
Equity Securities, FV-NI and without Readily Determinable Fair Value	22,944	41,651
FHLB and Federal Reserve Bank stocks, at cost	212,102	229,171
Residential loans held for sale	83,795	33,011
Commercial loans held for sale	0	90,303
Loans	29,618,271	29,216,218
Allowance for loan losses	(355,844)	(351,094)
Tax credit and other investments	246,300	258,067
Premises and equipment, net	369,968	372,978
Goodwill	1,104,992	1,104,992
Other intangible assets, net	36,066	40,471
Mortgage servicing rights, net	85,640	84,390
Interest receivable	173,106	169,569
Other assets	672,256	658,604
Total assets	41,623,908	41,015,855
Liabilities and stockholders' equity
Noninterest-bearing demand deposits	5,815,045	6,119,956
Interest-bearing deposits	26,875,995	27,326,093
Total deposits	32,691,039	33,446,049
Short-Term Debt	859,539	326,780
FHLB advances	2,673,046	1,940,194
Allowance for unfunded commitments	33,776	34,776
Accrued expenses and other liabilities	588,057	552,814
Total liabilities	37,381,571	36,841,882
Stockholders’ equity
Preferred equity	194,112	194,112
Common stock	1,752	1,752
Surplus	1,711,316	1,714,822
Retained earnings	3,070,762	2,946,805
Accumulated other comprehensive (loss)	(219,214)	(171,096)
Treasury stock, at cost	(516,391)	(512,421)
Total common equity	4,048,225	3,979,861
Total stockholders’ equity	4,242,337	4,173,973
Total liabilities and stockholders’ equity	$ 41,623,908	$ 41,015,855
Preferred shares authorized (par value $1.00 per share)	750,000	750,000
Preferred shares issued and outstanding	200,000	200,000
Common shares authorized (par value $0.01 per share)	250,000,000	250,000,000
Common shares issued	175,216,409	175,216,409
Common shares outstanding	150,785,257	151,036,674
Preferred shares, par value	$ 1.00	$ 1.00
Common shares, par value	$ 0.01	$ 0.01
Fair Value, Inputs, Level 1
Assets
Cash and Due from Banks	$ 470,818	$ 484,384
Interest-bearing deposits in other financial institutions	484,677	425,089
Federal funds sold and securities purchased under agreements to resell	3,600	14,350
Fair Value, Inputs, Level 2
Assets
Bank and corporate owned life insurance	683,451	682,649
Liabilities and stockholders' equity
FHLB advances	2,673,046	1,940,194
Other long-term funding	536,113	541,269
Fair Value, Inputs, Level 3
Assets
Loans, net	$ 29,262,428	$ 28,865,124