Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Interest income
Interest and fees on loans (includes tax-exempt income of $2,878,000 in 2025, $2,518,000 in 2024, and $1,913,000 in 2023)	$ 141,160	$ 129,440	$ 108,274
Interest on deposits with other banks	400	550	517
Interest and dividends on investments (includes tax-exempt income of $7,793,000 in 2025, $7,940,000 in 2024, and $8,032,000 in 2023)	18,711	18,842	19,383
Total interest income	160,271	148,832	128,174
Interest expense
Interest on deposits	76,697	79,411	61,004
Interest on borrowed funds	6,197	5,511	1,963
Total interest expense	82,894	84,922	62,967
Net interest income	77,377	63,910	65,207
Credit loss expense - loans	2,049	1,304	1,330
Credit loss reduction - debt securities HTM	(50)	(238)	(4)
Credit loss reduction - off-balance sheet credit exposures	(149)	(541)	(142)
Total credit loss expense	1,850	525	1,184
Net interest income after provision for credit losses	75,527	63,385	64,023
Non-interest income
Other operating income	3,451	3,094	2,699
Total non-interest income	17,340	16,355	15,437
Non-interest expense
Salaries and employee benefits	26,998	24,230	21,942
Occupancy expense	3,394	3,373	3,319
Furniture and equipment expense	5,878	5,622	5,391
FDIC insurance premiums	2,722	2,391	1,962
Amortization of identified intangibles	26	26	26
Other operating expense	11,910	11,514	11,118
Total non-interest expense	50,928	47,156	43,758
Income before income taxes	41,939	32,584	35,702
Applicable tax expense	7,545	5,539	6,184
Net income	$ 34,394	$ 27,045	$ 29,518
Basic earnings per common share (usd per share)	$ 3.10	$ 2.45	$ 2.68
Diluted earnings per common share (usd per share)	$ 3.07	$ 2.43	$ 2.66
Other comprehensive income (loss), net of tax
Net unrealized gain (loss) on securities available for sale, net of taxes	$ 11,330	$ (3,096)	$ 5,143
Net unrealized gain on transferred securities, net of taxes	9	9	8
Net unrealized loss on hedging derivative instruments	(157)	(143)	(244)
Net unrecognized (loss) gain on postretirement benefits	(47)	(16)	30
Other comprehensive gain (loss)	11,135	(3,246)	4,937
Comprehensive income	45,529	23,799	34,455
Fiduciary and investment management income
Non-interest income
Non-interest income	5,427	4,963	4,654
Service charges on deposit accounts
Non-interest income
Non-interest income	2,161	2,048	1,887
Mortgage origination and servicing income, net of amortization
Non-interest income
Non-interest income	846	794	813
Debit card income
Non-interest income
Non-interest income	$ 5,455	$ 5,456	$ 5,384