Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest income:
Interest and fees on loans, including loans held for sale	$ 39,684	$ 41,264	$ 80,373	$ 81,729
Interest and dividends on securities
Taxable	3,148	2,867	5,723	5,913
Tax exempt	795	596	1,534	1,123
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	123	138	247	278
Interest on Federal Reserve Bank deposits	116	88	192	584
Other, including interest on federal funds sold	9	15	17	40
Total interest income	43,875	44,968	88,086	89,667
Interest expense:
Interest on deposits	3,228	5,312	6,615	12,254
Interest on repurchase agreements and federal funds purchased	366	777	670	1,781
Interest on long-term debt	274	417	552	926
Total interest expense	3,868	6,506	7,837	14,961
Net interest income	40,007	38,462	80,249	74,706
Provision for credit losses	(4,257)	(49)	(6,756)	12,658
Net interest income after provision for credit losses	44,264	38,511	87,005	62,048
Noninterest income:
Service charges on deposit accounts	6,358	4,967	12,380	10,883
Gains on sales of loans, net	1,907	1,753	4,340	2,236
Trust and wealth management income	3,349	2,569	6,300	5,453
Loan related fees	1,004	822	3,274	917
Bank owned life insurance	581	564	1,154	1,137
Brokerage revenue	554	313	1,011	685
Securities gains	280	937	112	1,186
Other noninterest income	1,488	954	2,527	1,903
Total noninterest income	15,521	12,879	31,098	24,400
Noninterest expense:
Officer salaries and employee benefits	5,379	3,104	9,117	5,855
Other salaries and employee benefits	13,581	12,049	26,676	24,329
Occupancy, net	2,018	1,938	4,213	3,923
Equipment	650	686	1,283	1,407
Data processing	1,870	1,875	4,029	3,853
Bank franchise tax	365	1,812	725	3,624
Legal fees	287	496	639	973
Professional fees	466	514	1,007	1,083
Advertising and marketing	710	568	1,432	1,202
FDIC insurance	323	294	649	441
Other real estate owned provision and expense	488	601	806	1,470
Repossession expense	12	175	211	310
Amortization of limited partnership investments	838	920	1,675	1,808
Other noninterest expense	2,511	2,877	5,346	5,852
Total noninterest expense	29,498	27,909	57,808	56,130
Income before income taxes	30,287	23,481	60,295	30,318
Income taxes	6,356	3,829	12,746	4,087
Net income	23,931	19,652	47,549	26,231
Unrealized holding gains (losses) on debt securities available-for-sale:
Unrealized holding gains (losses) arising during the period	6,075	8,086	(7,381)	10,233
Less: Reclassification adjustments for realized gains on debt securities included in net income	0	564	60	1,045
Tax expense (benefit)	1,579	1,956	(1,935)	2,389
Other comprehensive income (loss), net of tax	4,496	5,566	(5,506)	6,799
Comprehensive income	$ 28,427	$ 25,218	$ 42,043	$ 33,030
Basic earnings per share (in dollars per share)	$ 1.35	$ 1.11	$ 2.67	$ 1.48
Diluted earnings per share (in dollars per share)	$ 1.34	$ 1.11	$ 2.67	$ 1.48
Weighted average shares outstanding-basic (in shares)	17,784	17,739	17,779	17,746
Weighted average shares outstanding-diluted (in shares)	17,800	17,742	17,794	17,753