Loans and Allowance for Credit Losses - Amortized Cost and Unpaid Principal of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	$ 1,413,886	$ 1,444,050
Allowance for credit losses, loans	(11,739)	(21,136)	$ (19,088)
Net loans	1,402,147	1,422,914
Unpaid Principal	1,425,429	1,455,830
Difference	(11,543)	(11,780)
Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	448,338	772,468
Allowance for credit losses, loans	(3,027)	(7,973)	(6,604)
Unpaid Principal	454,106
Difference	(5,768)
Commercial & industrial loans | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		612,254
Unpaid Principal		619,304
Difference		(7,050)
Commercial real estate | Owner occupied properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	300,200
Allowance for credit losses, loans	(3,176)
Unpaid Principal	301,623
Difference	(1,423)
Commercial real estate | Owner occupied properties | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		233,320
Unpaid Principal		234,363
Difference		(1,043)
Commercial real estate | Non-owner occupied and multifamily properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	435,311
Allowance for credit losses, loans	(2,930)
Unpaid Principal	438,631
Difference	(3,320)
Commercial real estate | Non-owner occupied and multifamily properties | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		392,452
Unpaid Principal		394,860
Difference		(2,408)
Residential real estate | 1-4 family residential properties secured by first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	32,542
Allowance for credit losses, loans	(439)
Unpaid Principal	32,602
Difference	(60)
Residential real estate | 1-4 family residential properties secured by first liens | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		33,415
Unpaid Principal		33,510
Difference		(95)
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]
Total portfolio loans	19,610
Allowance for credit losses, loans	(215)
Unpaid Principal	19,489
Difference	121
Residential real estate | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		18,236
Unpaid Principal		18,114
Difference		122
Residential real estate | 1-4 family residential construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	36,222
Allowance for credit losses, loans	(120)
Unpaid Principal	36,542
Difference	(320)
Residential real estate | 1-4 family residential construction loans | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		32,500
Unpaid Principal		32,760
Difference		(260)
Other construction, land development and raw land loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	88,094
Allowance for credit losses, loans	(1,635)
Unpaid Principal	88,604
Difference	(510)
Other construction, land development and raw land loans | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		83,463
Unpaid Principal		84,351
Difference		(888)
Obligations of states and political subdivisions in the US
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	16,403
Allowance for credit losses, loans	(32)
Unpaid Principal	16,565
Difference	(162)
Obligations of states and political subdivisions in the US | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		15,318
Unpaid Principal		15,274
Difference		44
Agricultural production, including commercial fishing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	27,959
Allowance for credit losses, loans	(91)
Unpaid Principal	28,082
Difference	(123)
Agricultural production, including commercial fishing | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		12,968
Unpaid Principal		13,093
Difference		(125)
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	4,801
Allowance for credit losses, loans	(67)
Unpaid Principal	4,763
Difference	38
Consumer loans | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		5,734
Unpaid Principal		5,794
Difference		(60)
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	4,406	0
Allowance for credit losses, loans	(7)	(2,107)	$ (2,079)
Unpaid Principal	4,422
Difference	$ (16)
Other loans | Cumulative effect, period of adoption, adjusted balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans		4,390
Unpaid Principal		4,407
Difference		$ (17)