Loans and Allowance for Credit Losses - Amortized Cost and Unpaid Principal of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 2,218,970		$ 2,129,263
Allowance for credit losses	(23,357)	$ (22,585)	(22,020)	$ (19,528)	$ (17,694)	$ (17,270)
Net loans	2,195,613		2,107,243
Unpaid Principal	2,228,783		2,138,450
Difference	(9,813)		(9,187)
Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	474,849		437,922
Allowance for credit losses	(7,512)	(7,508)	(5,800)	(4,304)	(4,047)	(3,438)
Unpaid Principal	477,205		440,163
Difference	(2,356)		(2,241)
Commercial real estate | Owner occupied properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	437,995		418,092
Allowance for credit losses	(2,393)	(2,271)	(2,944)	(2,921)	(2,963)	(2,867)
Unpaid Principal	439,971		420,060
Difference	(1,976)		(1,968)
Commercial real estate | Non-owner occupied and multifamily properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	713,315		615,662
Allowance for credit losses	(4,362)	(4,183)	(3,967)	(3,772)	(3,499)	(3,294)
Unpaid Principal	717,576		619,431
Difference	(4,261)		(3,769)
Residential real estate | 1-4 family residential properties secured by first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	216,598		270,966
Allowance for credit losses	(4,964)	(4,693)	(4,364)	(4,060)	(3,489)	(3,470)
Unpaid Principal	216,690		270,535
Difference	(92)		431
Residential real estate | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	66,279		49,160
Allowance for credit losses	(1,009)	(928)	(775)	(733)	(665)	(551)
Unpaid Principal	65,698		48,857
Difference	581		303
Residential real estate | 1-4 family residential construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	37,238		39,516
Allowance for credit losses	(282)	(270)	(230)	(242)	(180)	(191)
Unpaid Principal	37,428		39,789
Difference	(190)		(273)
Other construction, land development and raw land loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	183,081		212,561
Allowance for credit losses	(2,421)	(2,308)	(3,589)	(3,165)	(2,526)	(3,127)
Unpaid Principal	184,447		214,068
Difference	(1,366)		(1,507)
Obligations of states and political subdivisions in the US
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	32,341		29,471
Allowance for credit losses	(132)	(135)	(106)	(100)	(100)	(80)
Unpaid Principal	32,340		29,468
Difference	1		3
Agricultural production, including commercial fishing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	47,125		45,840
Allowance for credit losses	(189)	(197)	(169)	(155)	(157)	(168)
Unpaid Principal	47,325		46,069
Difference	(200)		(229)
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	8,335		7,638
Allowance for credit losses	(87)	(82)	(71)	(71)	(61)	(81)
Unpaid Principal	8,237		7,562
Difference	98		76
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	1,814		2,435
Allowance for credit losses	(6)	$ (10)	(5)	$ (5)	$ (7)	$ (3)
Unpaid Principal	1,866		2,448
Difference	$ (52)		$ (13)