Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income:
Loans, including fees	$ 363,293	$ 314,601
Loans held for sale	303	295
Securities-taxable	46,785	47,646
Securities-tax exempt	4,526	4,721
Short-term investments	6,777	5,340
Total interest income	421,684	372,603
Interest expense:
Deposits	147,483	64,451
Short-term borrowings	4,966	20,063
Long-term debt	3,064	3,095
Total interest expense	155,513	87,609
Net interest income	266,171	284,994
Provision for credit losses	12,968	6,020
Net interest income after provision for credit losses	253,203	278,974
Noninterest income:
Other income	13,178	11,218
Total noninterest income	87,851	80,330
Noninterest expense:
Compensation expense	96,569	92,403
Employee benefits	24,588	22,920
Personnel expense	121,157	115,323
Net occupancy expense	13,395	12,206
Equipment expense	4,228	4,736
Data processing expense	28,737	28,182
Professional services expense	9,036	9,131
Amortization of intangible assets	2,526	3,114
Deposit insurance and regulatory fees	8,931	5,920
Other real estate and foreclosed assets income, net	(196)	155
Other expense	19,908	22,117
Total noninterest expense	207,722	200,884
Income before income taxes	133,332	158,420
Income taxes expense	24,720	31,953
Net income	$ 108,612	$ 126,467
Earnings per common share-basic	$ 1.25	$ 1.45
Earnings per common share-diluted	1.24	1.45
Dividends paid per share	$ 0.30	$ 0.30
Weighted average shares outstanding-basic	86,521	86,018
Weighted average shares outstanding-diluted	86,726	86,282
Service charges on deposit accounts
Noninterest income:
Service charges on deposit accounts	$ 22,239	$ 20,622
Trust fees
Noninterest income:
Service charges on deposit accounts	17,077	16,734
Bank card and ATM fees
Noninterest income:
Service charges on deposit accounts	20,622	20,721
Investment and annuity fees and insurance commissions
Noninterest income:
Service charges on deposit accounts	11,844	8,867
Secondary mortgage market operations
Noninterest income:
Service charges on deposit accounts	$ 2,891	$ 2,168