Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INTEREST INCOME
Loans	$ 1,399,961	$ 810,007	$ 619,273
Securities:
Taxable interest	214,981	192,121	127,625
Tax-exempt interest	102,197	97,190	98,305
Total securities income	317,178	289,311	225,930
Federal funds and resell agreements	17,647	19,109	10,048
Interest-bearing due from banks	103,190	18,582	5,417
Trading securities	729	511	854
Total interest income	1,838,705	1,137,520	861,522
INTEREST EXPENSE
Deposits	704,210	167,553	26,412
Federal funds and repurchase agreements	93,026	40,703	6,934
Other	121,353	15,467	12,655
Total interest expense	918,589	223,723	46,001
Net interest income	920,116	913,797	815,521
Provision for credit losses	41,227	37,900	20,000
Net interest income after provision for credit losses	878,889	875,897	795,521
NONINTEREST INCOME
Trust and securities processing	257,200	237,207	224,126
Trading and investment banking	19,630	23,201	30,939
Service charges on deposit accounts	84,950	85,167	86,056
Insurance fees and commissions	1,009	1,338	1,309
Brokerage fees	54,119	43,019	12,171
Bankcard fees	74,719	73,451	64,576
Investment securities (losses) gains, net	(3,139)	58,444	5,057
Other	53,365	32,406	42,941
Total noninterest income	541,853	554,233	467,175
NONINTEREST EXPENSE
Salaries and employee benefits	553,421	524,431	504,442
Occupancy, net	48,502	48,848	47,345
Equipment	68,718	74,259	78,398
Supplies and services	16,829	13,590	14,986
Marketing and business development	25,749	25,699	18,533
Processing fees	103,099	82,227	67,563
Legal and consulting	29,998	39,095	32,406
Bankcard	32,969	26,367	19,145
Amortization of other intangible assets	8,587	5,037	4,757
Regulatory fees	77,010	15,378	11,894
Other	34,258	43,188	34,167
Total noninterest expense	999,140	898,119	833,636
Income (loss) before taxes	421,602	532,011	429,060
Income tax expense	71,578	100,329	76,042
NET INCOME	$ 350,024	$ 431,682	$ 353,018
PER SHARE DATA
Net income – basic	$ 7.22	$ 8.93	$ 7.31
Net income – diluted	7.18	8.86	7.24
Dividends	$ 1.53	$ 1.49	$ 1.38
Weighted average shares outstanding – basic	48,503,643	48,340,922	48,271,462
Weighted average shares outstanding – diluted	48,763,820	48,747,399	48,738,292