Condensed 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 income
Interest and fees on loans and leases	$ 51,476	$ 48,310	$ 151,727	$ 143,669
Interest and dividends on investment securities:
Taxable	1,552	1,646	4,254	6,569
Exempt from federal income taxes	20	137	155	573
Interest on deposits with other banks	189	100	291	492
Interest and dividends on other earning assets	334	419	1,042	1,308
Total interest income	53,571	50,612	157,469	152,611
Interest expense
Interest on deposits	3,230	4,028	9,789	15,806
Interest on short-term borrowings	2	97	7	325
Interest on long-term debt and subordinated notes	1,652	2,633	6,815	6,640
Total interest expense	4,884	6,758	16,611	22,771
Net interest income	48,687	43,854	140,858	129,840
(Reversal of provision) provision for credit losses	(182)	3,935	(11,524)	49,515
Net interest income after provision for credit losses	48,869	39,919	152,382	80,325
Disaggregation of Revenue [Line Items]
Insurance commission and fee income	3,837	3,776	12,631	12,575
Bank owned life insurance income	925	741	3,262	2,207
Net gain on sales of investment securities	21	57	140	817
Net gain on mortgage banking activities	3,224	5,860	12,623	12,119
Other income	1,625	2,171	3,474	4,017
Noninterest income	20,552	21,805	64,032	58,189
Noninterest expense
Salaries, benefits and commissions	26,641	24,059	76,817	69,595
Net occupancy	2,525	2,609	7,920	7,661
Equipment	1,000	972	2,914	2,890
Data processing	3,274	2,862	9,388	8,372
Professional fees	2,174	1,321	5,937	3,902
Marketing and advertising	539	463	1,380	1,400
Deposit insurance premiums	765	707	2,014	1,826
Intangible expenses	214	283	712	934
Other expense	6,116	5,251	16,992	16,684
Total noninterest expense	43,248	38,527	124,074	113,264
Income before income taxes	26,173	23,197	92,340	25,250
Income tax expense	5,262	5,078	17,951	4,208
Net income	$ 20,911	$ 18,119	$ 74,389	$ 21,042
Net income per share:
Basic (in dollars per share)	$ 0.71	$ 0.62	$ 2.53	$ 0.72
Diluted (in dollars per share)	$ 0.71	$ 0.62	$ 2.52	$ 0.72
Trust fee income
Disaggregation of Revenue [Line Items]
Noninterest income	$ 2,126	$ 1,915	$ 6,317	$ 5,729
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income	1,422	1,187	4,018	3,474
Investment advisory commission and fee income
Disaggregation of Revenue [Line Items]
Noninterest income	4,796	4,005	14,051	11,800
Other service fee income
Disaggregation of Revenue [Line Items]
Noninterest income	$ 2,576	$ 2,093	$ 7,516	$ 5,451