Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Interest income:
Loans, including fees	$ 338,413	$ 369,990	$ 669,901	$ 733,283
Loans held for sale	399	440	740	743
Securities-taxable	54,046	47,752	105,945	94,537
Securities-tax exempt	4,007	4,471	8,225	8,997
Short-term investments	5,716	4,892	13,091	11,669
Total interest income	402,581	427,545	797,902	849,229
Interest expense:
Deposits	117,766	144,610	238,273	292,093
Short-term borrowings	4,865	9,441	6,710	14,407
Long-term debt	2,991	3,064	6,055	6,128
Total interest expense	125,622	157,115	251,038	312,628
Net interest income	276,959	270,430	546,864	536,601
Provision for credit losses	14,925	8,723	25,387	21,691
Net interest income after provision for credit losses	262,034	261,707	521,477	514,910
Noninterest income:
Other income	14,761	13,264	31,814	26,442
Total noninterest income	98,524	89,174	193,315	177,025
Noninterest expense:
Compensation expense	95,875	97,121	184,827	193,690
Employee benefits	20,637	21,605	46,032	46,193
Personnel expense	116,512	118,726	230,859	239,883
Net occupancy expense	13,825	13,158	27,405	26,553
Equipment expense	4,541	4,312	8,632	8,540
Data processing expense	33,448	31,371	64,698	60,108
Professional services expense	16,371	9,458	28,606	18,494
Amortization of intangible assets	2,524	2,389	4,637	4,915
Deposit insurance and regulatory fees	4,822	6,008	9,848	14,939
Other real estate and foreclosed assets expense (income), net	1,181	(1,099)	2,961	(1,295)
Other expense	22,755	21,693	43,392	41,601
Total noninterest expense	215,979	206,016	421,038	413,738
Income before income taxes	144,579	144,865	293,754	278,197
Income taxes expense	31,048	30,308	60,719	55,028
Net income	$ 113,531	$ 114,557	$ 233,035	$ 223,169
Earnings per common share-basic	$ 1.32	$ 1.31	$ 2.7	$ 2.56
Earnings per common share-diluted	1.32	1.31	2.69	2.55
Dividends paid per share	$ 0.45	$ 0.40	$ 0.9	$ 0.7
Weighted average shares outstanding-basic	85,577	86,510	85,833	86,515
Weighted average shares outstanding-diluted	85,943	86,765	86,203	86,768
Service charges on deposit accounts
Noninterest income:
Service charges on deposit accounts	$ 24,256	$ 22,275	$ 48,375	$ 44,514
Trust fees
Noninterest income:
Service charges on deposit accounts	22,753	18,473	40,775	35,550
Bank card and ATM fees
Noninterest income:
Service charges on deposit accounts	22,004	21,827	42,718	42,449
Investment and annuity fees and insurance commissions
Noninterest income:
Service charges on deposit accounts	10,603	9,789	22,018	21,633
Secondary mortgage market operations
Noninterest income:
Service charges on deposit accounts	$ 4,147	$ 3,546	$ 7,615	$ 6,437