Unaudited Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest and dividend income:
Interest and fees on loans	$ 101,367	$ 88,639
Taxable interest and dividends on securities	27,876	10,206
Non-taxable interest and dividends on securities	1,806	1,856
Interest on federal funds sold and other short-term investments	436	432
Total interest and dividend income	131,485	101,133
Interest expense:
Interest on deposits	3,322	1,002
Interest on borrowings	39	40
Total interest expense	3,361	1,042
Net interest income	128,124	100,091
Release of allowance for loan losses	(485)	(580)
Net interest income after provision for loan losses	128,609	100,671
Noninterest income:
Insurance commissions	28,713	28,147
Service charges on deposit accounts	8,537	5,367
Trust and investment advisory fees	6,141	5,663
Debit card processing fees	2,945	2,749
Interest rate swap income	2,932	5,405
(Losses) income from investments held in rabbi trusts	(4,433)	1,846
Gains on sales of mortgage loans held for sale, net	169	1,479
(Losses) gains on sales of securities available for sale, net	(2,172)	1,164
Other	3,583	3,392
Total noninterest income	46,415	55,212
Noninterest expense:
Salaries and employee benefits	69,526	64,040
Office occupancy and equipment	11,614	8,217
Data processing	15,320	12,129
Professional services	4,701	4,148
Marketing	1,574	1,691
Loan expenses	1,168	1,847
FDIC insurance	1,412	948
Amortization of intangible assets	827	532
Other	2,724	497
Total noninterest expense	108,866	94,049
Income before income tax expense	66,158	61,834
Income tax expense	14,642	14,171
Net income	$ 51,516	$ 47,663
Basic earnings per share (in dollars per share)	$ 0.30	$ 0.28
Diluted earnings per share (in dollars per share)	$ 0.30	$ 0.28