Consolidated Statements of Income and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income:
Interest and fees on loans, including loans held for sale	$ 230,844	$ 169,885	$ 160,198
Interest and dividends on securities:
Taxable	27,263	21,695	13,981
Tax exempt	2,678	2,998	3,098
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	759	603	486
Interest on Federal Reserve Bank deposits	6,831	2,439	372
Other, including interest on federal funds sold	275	122	34
Total interest income	268,650	197,742	178,169
Interest expense:
Interest on deposits	81,167	24,068	12,753
Interest on repurchase agreements and federal funds purchased	8,994	2,540	1,254
Interest on advances from Federal Home Loan Bank	1,004	20	0
Interest on long-term debt	4,375	2,012	1,083
Total interest expense	95,540	28,640	15,090
Net interest income	173,110	169,102	163,079
Provision for credit losses (recovery)	6,811	4,905	(6,386)
Net interest income after provision for credit losses (recovery)	166,299	164,197	169,465
Noninterest income:
Deposit related fees	29,935	29,049	26,529
Gains on sales of loans, net	395	1,525	6,820
Trust and wealth management income	13,025	12,394	12,644
Loan related fees	3,792	6,185	5,578
Bank owned life insurance	3,517	2,708	2,844
Brokerage revenue	1,473	1,846	1,962
Securities gains (losses)	996	(168)	(158)
Other noninterest income	4,526	4,377	4,244
Total noninterest income	57,659	57,916	60,463
Noninterest expense:
Officer salaries and employee benefits	15,206	15,922	19,713
Other salaries and employee benefits	58,505	56,568	54,401
Occupancy, net	8,900	8,380	8,306
Equipment	2,943	2,703	2,548
Data processing	9,726	8,910	8,039
Bank franchise tax	1,649	1,528	1,705
Legal fees	1,131	1,159	1,160
Professional fees	2,219	2,275	2,039
Advertising and marketing	3,214	3,005	2,928
FDIC insurance	2,483	1,447	1,381
Other real estate owned provision and expense	350	456	1,401
Repossession expense	531	546	344
Amortization of limited partnership investments	2,638	2,853	3,352
Other noninterest expense	15,895	15,319	11,968
Total noninterest expense	125,390	121,071	119,285
Income before income taxes	98,568	101,042	110,643
Income taxes	20,564	19,228	22,704
Net income	78,004	81,814	87,939
Unrealized holding gains (losses) on debt securities available-for-sale:
Unrealized holding gains (losses) arising during the period	36,863	(168,060)	(24,827)
Less: Reclassification adjustments for realized gains (losses) included in net income	4	(81)	60
Tax expense (benefit)	11,028	(43,675)	(6,471)
Other comprehensive income (loss), net of tax	25,831	(124,304)	(18,416)
Comprehensive income (loss)	$ 103,835	$ (42,490)	$ 69,523
Basic earnings per share (in dollars per share)	$ 4.36	$ 4.59	$ 4.94
Diluted earnings per share (in dollars per share)	$ 4.36	$ 4.58	$ 4.94
Weighted average shares outstanding-basic (in shares)	17,887	17,836	17,786
Weighted average shares outstanding-diluted (in shares)	17,900	17,851	17,804