Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest income:
Loans, including fees	$ 369,349	$ 358,669	$ 1,102,632	$ 1,014,726
Loans held for sale	575	798	1,318	1,458
Securities-taxable	49,148	46,934	143,685	142,081
Securities-tax exempt	4,359	4,624	13,356	14,073
Short-term investments	6,045	4,802	17,714	21,365
Total interest income	429,476	415,827	1,278,705	1,193,703
Interest expense:
Deposits	147,227	130,797	439,320	297,783
Short-term borrowings	7,421	12,732	21,828	58,528
Long-term debt	3,064	3,064	9,192	9,253
Total interest expense	157,712	146,593	470,340	365,564
Net interest income	271,764	269,234	808,365	828,139
Provision for credit losses	18,564	28,498	40,255	42,151
Net interest income after provision for credit losses	253,200	240,736	768,110	785,988
Noninterest income:
Other income	18,829	15,433	45,271	39,470
Total noninterest income	95,895	85,974	272,920	249,529
Noninterest expense:
Compensation expense	94,371	95,650	288,061	282,174
Employee benefits	21,400	20,616	67,593	64,279
Personnel expense	115,771	116,266	355,654	346,453
Net occupancy expense	13,438	13,434	39,991	38,347
Equipment expense	4,689	4,776	13,229	14,555
Data processing expense	31,124	29,822	91,232	87,566
Professional services expense	10,984	9,519	29,478	27,565
Amortization of intangible assets	2,292	2,813	7,207	8,884
Deposit insurance and regulatory fees	5,480	5,851	20,419	18,234
Other real estate and foreclosed assets income, net	(411)	(26)	(1,706)	(153)
Other expense	20,472	22,220	62,073	66,246
Total noninterest expense	203,839	204,675	617,577	607,697
Income before income taxes	145,256	122,035	423,453	427,820
Income taxes expense	29,684	24,297	84,712	85,821
Net income	$ 115,572	$ 97,738	$ 338,741	$ 341,999
Earnings per common share-basic	$ 1.33	$ 1.12	$ 3.89	$ 3.93
Earnings per common share-diluted	1.33	1.12	3.88	3.92
Dividends paid per share	$ 0.40	$ 0.30	$ 1.10	$ 0.90
Weighted average shares outstanding-basic	86,234	86,131	86,421	86,082
Weighted average shares outstanding-diluted	86,560	86,437	86,650	86,368
Service charges on deposit accounts
Noninterest income:
Service charges on deposit accounts	$ 23,144	$ 22,264	$ 67,658	$ 64,377
Trust fees
Noninterest income:
Service charges on deposit accounts	18,014	16,593	53,564	50,720
Bank card and ATM fees
Noninterest income:
Service charges on deposit accounts	21,639	20,555	64,088	62,258
Investment and annuity fees and insurance commissions
Noninterest income:
Service charges on deposit accounts	10,890	8,520	32,523	25,628
Secondary mortgage market operations
Noninterest income:
Service charges on deposit accounts	$ 3,379	$ 2,609	$ 9,816	$ 7,076