Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024		Dec. 31, 2023
Assets [Abstract]
Cash and due from banks	$ 1,043,969		$ 947,613
Interest-bearing cash and cash equivalents	390,732		400,652
Trading securities	4,899,090		5,193,505
Investment securities	2,017,225	[1]	2,244,153	[2]
Available for sale securities	12,851,600		12,286,681
Fair value option securities	17,876		20,671
Restricted equity securities	406,178		423,099
Residential mortgage loans held for sale	77,561		56,935
Loans	24,114,724		23,904,968
Allowance for loan losses	(280,035)		(277,123)
Loans, net of allowance	23,834,689		23,627,845
Premises and equipment, net	634,485		622,223
Receivables	281,091		317,922
Goodwill	1,044,749		1,044,749
Intangible assets, net	46,788		59,979
Mortgage servicing rights	338,145		293,884
Real estate and other repossessed assets, net of allowance	2,254		2,875
Derivative contracts, net	242,809		410,304
Cash surrender value of bank-owned life insurance	416,741		409,548
Receivable on unsettled securities sales	4,825		391,910
Other assets	1,135,085		1,070,282
Total assets	49,685,892		49,824,830
Deposits [Abstract]
Noninterest-bearing demand deposits	8,371,897		9,196,493
Interest-bearing Deposit Liabilities [Abstract]
Transaction	25,455,106		20,964,101
Savings	828,817		847,085
Time	3,535,410		3,012,022
Total deposits	38,191,230		34,019,701
Funds purchased and repurchase agreements	1,292,856		1,122,748
Other borrowings	3,030,123		7,701,552
Subordinated debentures	131,200		131,150
Accrued interest, taxes, and expense	352,345		338,996
Derivative contracts, net	237,582		587,473
Due on unsettled securities purchases	405,494		254,057
Other liabilities	494,105		523,734
Total liabilities	44,134,935		44,679,411
Shareholders' equity: [Abstract]
Common stock	5		5
Capital surplus	1,429,628		1,406,745
Retained earnings	5,592,100		5,211,512
Treasury stock	(970,340)		(876,720)
Accumulated other comprehensive loss	(503,040)		(599,100)
Total shareholders’ equity	5,548,353		5,142,442
Non-controlling interests	2,604		2,977
Total equity	5,550,957		5,145,419
Total liabilities and equity	$ 49,685,892		$ 49,824,830

[1] Carrying value includes $119 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

[2] Carrying value includes $165 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.