Loans and Allowance for Credit Losses - Amortized Cost and Unpaid Principal of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1,405,709		$ 1,413,886
Allowance for credit losses	(11,537)	$ (11,310)	(11,739)	$ (14,539)	$ (14,764)	$ (16,625)
Net loans	1,394,172		1,402,147
Unpaid Principal	1,414,005		1,425,429
Difference	(8,296)		(11,543)
Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	394,841		448,338
Allowance for credit losses	(2,961)	(2,901)	(3,027)	(4,291)	(4,269)	(4,348)
Unpaid Principal	397,154		454,106
Difference	(2,313)		(5,768)
Commercial real estate | Owner occupied properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	313,174		300,200
Allowance for credit losses	(2,573)	(2,513)	(3,176)	(3,340)	(3,366)	(3,579)
Unpaid Principal	314,761		301,623
Difference	(1,587)		(1,423)
Commercial real estate | Non-owner occupied and multifamily properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	446,592		435,311
Allowance for credit losses	(3,107)	(3,063)	(2,930)	(3,841)	(3,704)	(4,944)
Unpaid Principal	449,987		438,631
Difference	(3,395)		(3,320)
Residential real estate | 1-4 family residential properties secured by first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	37,298		32,542
Allowance for credit losses	(620)	(510)	(439)	(630)	(813)	(673)
Unpaid Principal	37,346		32,602
Difference	(48)		(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	21,953		19,610
Allowance for credit losses	(327)	(301)	(215)	(340)	(342)	(419)
Unpaid Principal	21,821		19,489
Difference	132		121
Residential real estate | 1-4 family residential construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	43,915		36,222
Allowance for credit losses	(231)	(210)	(120)	(231)	(260)	(454)
Unpaid Principal	44,215		36,542
Difference	(300)		(320)
Other construction, land development and raw land loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	87,163		88,094
Allowance for credit losses	(1,462)	(1,550)	(1,635)	(1,670)	(1,821)	(1,994)
Unpaid Principal	87,669		88,604
Difference	(506)		(510)
Obligations of states and political subdivisions in the US
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	24,005		16,403
Allowance for credit losses	(59)	(52)	(32)	(39)	(36)	(44)
Unpaid Principal	24,152		16,565
Difference	(147)		(162)
Agricultural production, including commercial fishing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	29,482		27,959
Allowance for credit losses	(127)	(128)	(91)	(57)	(46)	(49)
Unpaid Principal	29,638		28,082
Difference	(156)		(123)
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	4,092		4,801
Allowance for credit losses	(64)	(75)	(67)	(94)	(104)	(118)
Unpaid Principal	4,054		4,763
Difference	38		38
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	3,194		4,406
Allowance for credit losses	(6)	$ (7)	(7)	$ (6)	$ (3)	$ (3)
Unpaid Principal	3,208		4,422
Difference	$ (14)		$ (16)