Consolidated Statements of Income and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income:
Interest and fees on loans, including loans held for sale	$ 169,885	$ 160,198	$ 160,826
Interest and dividends on securities:
Taxable	21,695	13,981	11,939
Tax exempt	2,998	3,098	2,380
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	603	486	532
Interest on Federal Reserve Bank deposits	2,439	372	704
Other, including interest on federal funds sold	122	34	60
Total interest income	197,742	178,169	176,441
Interest expense:
Interest on deposits	24,068	12,753	21,177
Interest on repurchase agreements and federal funds purchased	2,540	1,254	2,788
Interest on advances from Federal Home Loan Bank	20	0	0
Interest on long-term debt	2,012	1,083	1,485
Total interest expense	28,640	15,090	25,450
Net interest income	169,102	163,079	150,991
Provision for credit losses (recovery)	4,905	(6,386)	16,047
Net interest income after provision for credit losses (recovery)	164,197	169,465	134,944
Noninterest income:
Service charges on deposit accounts	29,049	26,529	23,461
Gains on sales of loans, net	1,525	6,820	7,226
Trust and wealth management income	12,394	12,644	10,931
Loan related fees	6,185	5,578	4,041
Bank owned life insurance	2,708	2,844	2,306
Brokerage revenue	1,846	1,962	1,483
Securities gains (losses)	(168)	(158)	1,769
Other noninterest income	4,377	4,244	3,343
Total noninterest income	57,916	60,463	54,560
Noninterest expense:
Officer salaries and employee benefits	15,922	19,713	15,257
Other salaries and employee benefits	56,568	54,401	51,170
Occupancy, net	8,380	8,306	7,912
Equipment	2,703	2,548	2,737
Data processing	8,910	8,039	7,941
Bank franchise tax	1,528	1,705	7,299
Legal fees	1,159	1,160	1,634
Professional fees	2,275	2,039	2,091
Advertising and marketing	3,005	2,928	2,980
FDIC insurance	1,447	1,381	1,056
Other real estate owned provision and expense	456	1,401	2,655
Repossession expense	546	344	717
Amortization of limited partnership investments	2,853	3,352	3,759
Other noninterest expense	15,319	11,968	12,031
Total noninterest expense	121,071	119,285	119,239
Income before income taxes	101,042	110,643	70,265
Income taxes	19,228	22,704	10,761
Net income	81,814	87,939	59,504
Unrealized holding gains (losses) on debt securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(168,060)	(24,827)	13,839
Less: Reclassification adjustments for realized gains (losses) included in net income	(81)	60	1,251
Tax expense (benefit)	(43,675)	(6,471)	3,273
Other comprehensive income (loss), net of tax	(124,304)	(18,416)	9,315
Comprehensive income (loss)	$ (42,490)	$ 69,523	$ 68,819
Basic earnings per share (in dollars per share)	$ 4.59	$ 4.94	$ 3.35
Diluted earnings per share (in dollars per share)	$ 4.58	$ 4.94	$ 3.35
Weighted average shares outstanding-basic (in shares)	17,836	17,786	17,748
Weighted average shares outstanding-diluted (in shares)	17,851	17,804	17,756