Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest and fees on loans and leases:
Taxable	$ 44,757	$ 47,151	$ 90,318	$ 92,833
Exempt from federal income taxes	2,380	2,759	5,041	5,442
Total interest and fees on loans and leases	47,137	49,910	95,359	98,275
Interest and dividends on investment securities:
Taxable	2,218	2,645	4,923	5,358
Exempt from federal income taxes	196	401	436	832
Interest on deposits with other banks	67	569	392	838
Interest and dividends on other earning assets	362	535	889	1,121
Total interest income	49,980	54,060	101,999	106,424
Interest expense
Interest on deposits	4,372	9,111	11,778	17,314
Interest on short-term borrowings	122	217	228	855
Interest on long-term debt and subordinated notes	1,968	2,097	4,007	4,097
Total interest expense	6,462	11,425	16,013	22,266
Net interest income	43,518	42,635	85,986	84,158
Provision for credit losses	23,737	2,073	45,580	4,753
Net interest income after provision for credit losses	19,781	40,562	40,406	79,405
Disaggregation of Revenue [Line Items]
Insurance commission and fee income	4,067	3,941	8,799	9,085
Bank owned life insurance income	732	743	1,466	1,695
Net gain on sales of investment securities	65	7	760	8
Net gain on mortgage banking activities	3,515	796	6,259	1,279
Other income	1,779	723	1,846	1,062
Total noninterest income	18,000	16,356	36,384	32,653
Noninterest expense
Salaries, benefits and commissions	21,700	22,052	45,536	43,598
Net occupancy	2,478	2,601	5,052	5,212
Equipment	923	1,065	1,918	2,055
Data processing	2,750	2,627	5,510	5,141
Professional fees	1,264	1,307	2,581	2,571
Marketing and advertising	535	786	937	1,326
Deposit insurance premiums	615	430	1,119	882
Intangible expenses	321	417	651	843
Other expense	5,374	5,496	11,433	10,715
Total noninterest expense	35,960	36,781	74,737	72,343
Income before income taxes	1,821	20,137	2,053	39,715
Income tax (benefit) expense	(264)	3,669	(870)	7,168
Net income	$ 2,085	$ 16,468	$ 2,923	$ 32,547
Net income per share:
Basic (in dollars per share)	$ 0.07	$ 0.56	$ 0.10	$ 1.11
Diluted (in dollars per share)	$ 0.07	$ 0.56	$ 0.10	$ 1.11
Trust fee income
Disaggregation of Revenue [Line Items]
Noninterest income	$ 1,924	$ 2,054	$ 3,814	$ 3,941
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income	890	1,447	2,287	2,882
Investment advisory commission and fee income
Disaggregation of Revenue [Line Items]
Noninterest income	3,540	4,055	7,795	7,844
Other service fee income
Disaggregation of Revenue [Line Items]
Noninterest income	$ 1,488	$ 2,590	$ 3,358	$ 4,857