CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income:
Loans and leases	$ 387,298	$ 263,894	$ 235,031
Investment securities, taxable	24,501	26,294	17,767
Investment securities, tax-exempt	1,445	1,049	601
Other	3,663	2,579	1,373
Total interest income	416,907	293,816	254,772
Interest expense:
Deposits	123,162	25,231	12,276
Short-term borrowings	7,032	1,497	115
Subordinated notes	4,174	3,550	3,267
Long-term debt and mandatorily redeemable securities	3,892	69	2,476
Total interest expense	138,260	30,347	18,134
Net interest income	278,647	263,469	236,638
Provision (recovery of provision) for credit losses	5,866	13,245	(4,303)
Net interest income after provision for credit losses	272,781	250,224	240,941
Noninterest income:
Mortgage banking	3,471	4,122	11,822
Insurance commissions	6,911	6,703	7,247
Income related to lease payments	8,837	12,274	16,647
Losses on investment securities available-for-sale	(2,926)	(184)	(680)
Other	19,895	15,042	12,560
Total noninterest income	90,623	91,262	100,092
Noninterest expense:
Salaries and employee benefits	115,612	105,110	105,808
Net occupancy	11,090	10,728	10,524
Furniture and equipment	5,653	5,448	5,977
Data processing	25,055	22,375	19,877
Depreciation - leased equipment	7,093	10,023	13,694
Professional fees	6,705	7,280	8,676
FDIC and other insurance	5,926	3,625	2,677
Business development and marketing	7,157	5,823	8,013
Other	17,433	14,287	10,902
Total noninterest expense	201,724	184,699	186,148
Income before income taxes	161,680	156,787	154,885
Income tax expense	36,746	36,255	36,328
Net income	124,934	120,532	118,557
Net (income) loss attributable to noncontrolling interests	(7)	(23)	(23)
Net income available to common shareholders	$ 124,927	$ 120,509	$ 118,534
Basic net income per common share, in dollars per share	$ 5.03	$ 4.84	$ 4.70
Diluted net income per common share, in dollars per share	$ 5.03	$ 4.84	$ 4.70
Trust and wealth advisory
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	$ 23,706	$ 23,107	$ 23,782
Service charges on deposit accounts
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	12,749	12,146	10,589
Debit card
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	$ 17,980	$ 18,052	$ 18,125