Unaudited Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest and dividend income:
Interest and fees on loans	$ 86,735	$ 90,704	$ 266,310	$ 278,385
Taxable interest and dividends on available for sale securities	14,314	7,554	36,977	23,332
Non-taxable interest and dividends on available for sale securities	1,848	1,883	5,561	5,709
Interest on federal funds sold and other short-term investments	571	372	1,434	1,173
Interest and dividends on trading securities	0	0	0	6
Total interest and dividend income	103,468	100,513	310,282	308,605
Interest expense:
Interest on deposits	736	1,727	2,769	10,245
Interest on borrowings	41	44	123	717
Total interest expense	777	1,771	2,892	10,962
Net interest income	102,691	98,742	307,390	297,643
(Release of) provision for allowance for loan losses	(1,488)	700	(5,368)	37,900
Net interest income after provision for loan losses	104,179	98,042	312,758	259,743
Noninterest income:
Insurance commissions	21,956	21,884	73,767	72,058
Service charges on deposit accounts	5,935	5,052	17,010	15,514
Trust and investment advisory fees	6,310	5,311	18,047	15,600
Debit card processing fees	3,030	2,721	8,949	7,528
Interest rate swap income (losses)	881	1,319	5,122	(3,919)
(Losses) income from investments held in rabbi trusts	(289)	3,800	5,773	4,802
Losses on trading securities, net	0	0	0	(3)
Gains on sales of mortgage loans held for sale, net	717	2,219	3,044	3,732
Gains on sales of securities available for sale, net	1	0	1,166	285
Other	4,668	5,403	11,276	13,138
Total noninterest income	43,209	47,709	144,154	128,735
Noninterest expense:
Salaries and employee benefits	66,238	66,593	199,554	191,517
Office occupancy and equipment	7,960	8,294	24,271	25,598
Data processing	12,191	11,721	37,892	33,905
Professional services	4,024	5,510	14,611	13,595
Charitable contributions	0	0	0	3,984
Marketing	1,598	1,943	6,786	6,056
Loan expenses	1,586	1,554	5,287	4,702
FDIC insurance	1,056	938	2,989	2,788
Amortization of intangible assets	629	699	1,786	2,102
Other	3,688	12,565	7,178	21,507
Total noninterest expense	98,970	109,817	300,354	305,754
Income before income tax expense	48,418	35,934	156,558	82,724
Income tax expense	11,312	7,429	36,980	15,924
Net income	$ 37,106	$ 28,505	$ 119,578	$ 66,800
Basic earnings per share (in dollars per share)	$ 0.22	$ 0	$ 0.69	$ 0
Diluted earnings per share (in dollars per share)	$ 0.22	$ 0	$ 0.69	$ 0