Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ 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, including loans held for sale	$ 40,636	$ 39,577	$ 121,009	$ 121,306
Interest and dividends on securities
Taxable	4,083	3,220	9,806	9,133
Tax exempt	783	629	2,317	1,752
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	122	129	369	407
Interest on Federal Reserve Bank deposits	93	61	285	645
Other, including interest on federal funds sold	9	10	26	50
Total interest income	45,726	43,626	133,812	133,293
Interest expense:
Interest on deposits	3,119	4,975	9,734	17,229
Interest on repurchase agreements and federal funds purchased	326	691	996	2,472
Interest on long-term debt	267	280	819	1,206
Total interest expense	3,712	5,946	11,549	20,907
Net interest income	42,014	37,680	122,263	112,386
Provision for credit losses (recovery)	(163)	2,433	(6,919)	15,091
Net interest income after provision for credit losses (recovery)	42,177	35,247	129,182	97,295
Noninterest income:
Service charges on deposit accounts	7,066	6,296	19,446	17,179
Gains on sales of loans, net	1,239	2,470	5,579	4,706
Trust and wealth management income	3,039	2,692	9,339	8,145
Loan related fees	1,050	1,383	4,324	2,300
Bank owned life insurance	654	602	1,808	1,739
Brokerage revenue	519	310	1,530	995
Securities gains (losses)	(62)	142	50	1,328
Other noninterest income	883	1,016	3,410	2,919
Total noninterest income	14,388	14,911	45,486	39,311
Noninterest expense:
Officer salaries and employee benefits	4,861	3,115	13,978	8,970
Other salaries and employee benefits	13,992	13,022	40,668	37,351
Occupancy, net	2,087	2,029	6,300	5,952
Equipment	646	695	1,929	2,102
Data processing	1,911	1,936	5,940	5,789
Bank franchise tax	453	1,815	1,178	5,439
Legal fees	245	467	884	1,440
Professional fees	440	534	1,447	1,617
Advertising and marketing	819	797	2,251	1,999
FDIC insurance	393	295	1,042	736
Other real estate owned provision and expense	296	505	1,102	1,975
Repossession expense	83	285	294	595
Amortization of limited partnership investments	839	984	2,514	2,792
Other noninterest expense	3,263	2,994	8,609	8,846
Total noninterest expense	30,328	29,473	88,136	85,603
Income before income taxes	26,237	20,685	86,532	51,003
Income taxes	5,095	3,238	17,841	7,325
Net income	21,142	17,447	68,691	43,678
Unrealized holding gains (losses) on debt securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(9,322)	2,107	(16,703)	12,340
Less: Reclassification adjustments for realized gains on debt securities included in net income	0	24	60	1,069
Tax expense (benefit)	(2,423)	541	(4,358)	2,930
Other comprehensive income (loss), net of tax	(6,899)	1,542	(12,405)	8,341
Comprehensive income	$ 14,243	$ 18,989	$ 56,286	$ 52,019
Basic earnings per share (in dollars per share)	$ 1.19	$ 0.98	$ 3.86	$ 2.46
Diluted earnings per share (in dollars per share)	$ 1.19	$ 0.98	$ 3.86	$ 2.46
Weighted average shares outstanding-basic (in shares)	17,790	17,746	17,783	17,746
Weighted average shares outstanding-diluted (in shares)	17,808	17,752	17,798	17,753