Unaudited Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest and dividend income:
Interest and fees on loans	$ 88,639	$ 95,538
Taxable interest and dividends on available for sale securities	10,206	8,178
Non-taxable interest and dividends on available for sale securities	1,856	1,921
Interest on federal funds sold and other short-term investments	432	517
Interest and dividends on trading securities	0	5
Total interest and dividend income	101,133	106,159
Interest expense:
Interest on deposits	1,002	5,414
Interest on borrowings	40	599
Total interest expense	1,042	6,013
Net interest income	100,091	100,146
(Release of) provision for allowance for loan losses	(580)	28,600
Net interest income after provision for loan losses	100,671	71,546
Noninterest income:
Insurance commissions	28,147	27,477
Service charges on deposit accounts	5,367	6,098
Trust and investment advisory fees	5,663	5,095
Debit card processing fees	2,749	2,470
Interest rate swap income (losses)	5,405	(6,009)
Income (losses) from investments held in rabbi trusts	1,846	(6,743)
Losses on trading securities, net	0	(2)
Gains on sales of mortgage loans held for sale, net	1,479	93
Gains on sales of securities available for sale, net	1,164	122
Other	3,392	4,768
Total noninterest income	55,212	33,369
Noninterest expense:
Salaries and employee benefits	64,040	61,589
Office occupancy and equipment	8,217	8,689
Data processing	12,129	10,004
Professional services	4,148	3,689
Charitable contributions	0	1,187
Marketing	1,691	2,468
Loan expenses	1,847	1,112
FDIC insurance	948	906
Amortization of intangible assets	532	702
Other	497	4,826
Total noninterest expense	94,049	95,172
Income before income tax expense	61,834	9,743
Income tax expense	14,171	1,298
Net income	$ 47,663	$ 8,445
Basic earnings per share (in dollars per share)	$ 0.28	$ 0
Diluted earnings per share (in dollars per share)	$ 0.28	$ 0