Loans and Allowance for Credit Losses - Amortized Cost and Unpaid Principal of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1,407,266		$ 1,413,886
Allowance for credit losses	(11,982)	$ (11,537)	(11,739)	$ (13,816)	$ (14,539)	$ (16,625)
Net loans	1,395,284		1,402,147
Unpaid Principal	1,415,239		1,425,429
Difference	(7,973)		(11,543)
Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	375,833		448,338
Allowance for credit losses	(2,897)	(2,961)	(3,027)	(3,982)	(4,291)	(4,348)
Unpaid Principal	377,674		454,106
Difference	(1,841)		(5,768)
Commercial real estate | Owner occupied properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	329,813		300,200
Allowance for credit losses	(2,760)	(2,573)	(3,176)	(3,493)	(3,340)	(3,579)
Unpaid Principal	331,385		301,623
Difference	(1,572)		(1,423)
Commercial real estate | Non-owner occupied and multifamily properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	449,760		435,311
Allowance for credit losses	(3,227)	(3,107)	(2,930)	(3,876)	(3,841)	(4,944)
Unpaid Principal	453,242		438,631
Difference	(3,482)		(3,320)
Residential real estate | 1-4 family residential properties secured by first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	39,208		32,542
Allowance for credit losses	(698)	(620)	(439)	(476)	(630)	(673)
Unpaid Principal	39,244		32,602
Difference	(36)		(60)
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	23,176		19,610
Allowance for credit losses	(366)	(327)	(215)	(307)	(340)	(419)
Unpaid Principal	23,029		19,489
Difference	147		121
Residential real estate | 1-4 family residential construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	47,779		36,222
Allowance for credit losses	(281)	(231)	(120)	(184)	(231)	(454)
Unpaid Principal	48,004		36,542
Difference	(225)		(320)
Other construction, land development and raw land loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	77,442		88,094
Allowance for credit losses	(1,477)	(1,462)	(1,635)	(1,279)	(1,670)	(1,994)
Unpaid Principal	78,266		88,604
Difference	(824)		(510)
Obligations of states and political subdivisions in the US
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	24,830		16,403
Allowance for credit losses	(63)	(59)	(32)	(36)	(39)	(44)
Unpaid Principal	24,835		16,565
Difference	(5)		(162)
Agricultural production, including commercial fishing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	32,073		27,959
Allowance for credit losses	(140)	(127)	(91)	(94)	(57)	(49)
Unpaid Principal	32,236		28,082
Difference	(163)		(123)
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	4,168		4,801
Allowance for credit losses	(66)	(64)	(67)	(83)	(94)	(118)
Unpaid Principal	4,127		4,763
Difference	41		38
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	3,184		4,406
Allowance for credit losses	(7)	$ (6)	(7)	$ (6)	$ (6)	$ (3)
Unpaid Principal	3,197		4,422
Difference	$ (13)		$ (16)