Loans and Allowance for Credit Losses - Aging of Contractually Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	$ 1,450,657	$ 1,444,050
Greater Than 90 Days Past Due Still Accruing	0	449
Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	7,736	10,950
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	310	2,929
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	187	229
Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	7,239	7,792
Current
Financing Receivable, Past Due [Line Items]
Loans	1,442,921	1,433,100
Commercial & industrial loans
Financing Receivable, Past Due [Line Items]
Loans	504,305	772,468
Greater Than 90 Days Past Due Still Accruing	0
Commercial & industrial loans | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		612,254
Greater Than 90 Days Past Due Still Accruing		0
Commercial & industrial loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	4,512
Commercial & industrial loans | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		3,146
Commercial & industrial loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	266
Commercial & industrial loans | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		242
Commercial & industrial loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	19
Commercial & industrial loans | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		229
Commercial & industrial loans | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	4,227
Commercial & industrial loans | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		2,675
Commercial & industrial loans | Current
Financing Receivable, Past Due [Line Items]
Loans	499,793
Commercial & industrial loans | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		609,108
Commercial real estate | Owner occupied properties
Financing Receivable, Past Due [Line Items]
Loans	292,021
Greater Than 90 Days Past Due Still Accruing	0
Commercial real estate | Owner occupied properties | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		233,320
Greater Than 90 Days Past Due Still Accruing		449
Commercial real estate | Owner occupied properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,219
Commercial real estate | Owner occupied properties | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		4,662
Commercial real estate | Owner occupied properties | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Commercial real estate | Owner occupied properties | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		2,203
Commercial real estate | Owner occupied properties | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Commercial real estate | Owner occupied properties | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Commercial real estate | Owner occupied properties | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,219
Commercial real estate | Owner occupied properties | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		2,459
Commercial real estate | Owner occupied properties | Current
Financing Receivable, Past Due [Line Items]
Loans	290,802
Commercial real estate | Owner occupied properties | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		228,658
Commercial real estate | Non-owner occupied and multifamily properties
Financing Receivable, Past Due [Line Items]
Loans	443,258
Greater Than 90 Days Past Due Still Accruing	0
Commercial real estate | Non-owner occupied and multifamily properties | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		392,452
Greater Than 90 Days Past Due Still Accruing		0
Commercial real estate | Non-owner occupied and multifamily properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Commercial real estate | Non-owner occupied and multifamily properties | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Commercial real estate | Non-owner occupied and multifamily properties | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Commercial real estate | Non-owner occupied and multifamily properties | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Commercial real estate | Non-owner occupied and multifamily properties | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Commercial real estate | Non-owner occupied and multifamily properties | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Commercial real estate | Non-owner occupied and multifamily properties | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Commercial real estate | Non-owner occupied and multifamily properties | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Commercial real estate | Non-owner occupied and multifamily properties | Current
Financing Receivable, Past Due [Line Items]
Loans	443,258
Commercial real estate | Non-owner occupied and multifamily properties | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		392,452
Residential | 1-4 family residential properties secured by first liens
Financing Receivable, Past Due [Line Items]
Loans	29,548
Greater Than 90 Days Past Due Still Accruing	0
Residential | 1-4 family residential properties secured by first liens | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		33,415
Greater Than 90 Days Past Due Still Accruing		0
Residential | 1-4 family residential properties secured by first liens | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	168
Residential | 1-4 family residential properties secured by first liens | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		446
Residential | 1-4 family residential properties secured by first liens | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Residential | 1-4 family residential properties secured by first liens | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		446
Residential | 1-4 family residential properties secured by first liens | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	168
Residential | 1-4 family residential properties secured by first liens | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Residential | 1-4 family residential properties secured by first liens | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Residential | 1-4 family residential properties secured by first liens | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Residential | 1-4 family residential properties secured by first liens | Current
Financing Receivable, Past Due [Line Items]
Loans	29,380
Residential | 1-4 family residential properties secured by first liens | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		32,969
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens
Financing Receivable, Past Due [Line Items]
Loans	18,749
Greater Than 90 Days Past Due Still Accruing	0
Residential | 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
Financing Receivable, Past Due [Line Items]
Loans		18,236
Greater Than 90 Days Past Due Still Accruing		0
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	183
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		177
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	44
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		38
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	139
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		139
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | Current
Financing Receivable, Past Due [Line Items]
Loans	18,566
Residential | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		18,059
Residential | 1-4 family residential construction loans
Financing Receivable, Past Due [Line Items]
Loans	36,386
Greater Than 90 Days Past Due Still Accruing	0
Residential | 1-4 family residential construction loans | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		32,500
Greater Than 90 Days Past Due Still Accruing		0
Residential | 1-4 family residential construction loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	109
Residential | 1-4 family residential construction loans | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		702
Residential | 1-4 family residential construction loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Residential | 1-4 family residential construction loans | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Residential | 1-4 family residential construction loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Residential | 1-4 family residential construction loans | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Residential | 1-4 family residential construction loans | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	109
Residential | 1-4 family residential construction loans | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		702
Residential | 1-4 family residential construction loans | Current
Financing Receivable, Past Due [Line Items]
Loans	36,277
Residential | 1-4 family residential construction loans | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		31,798
Other construction, land development and raw land loans
Financing Receivable, Past Due [Line Items]
Loans	73,313
Greater Than 90 Days Past Due Still Accruing	0
Other construction, land development and raw land loans | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		83,463
Greater Than 90 Days Past Due Still Accruing		0
Other construction, land development and raw land loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,545
Other construction, land development and raw land loans | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		1,545
Other construction, land development and raw land loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Other construction, land development and raw land loans | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Other construction, land development and raw land loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Other construction, land development and raw land loans | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Other construction, land development and raw land loans | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,545
Other construction, land development and raw land loans | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		1,545
Other construction, land development and raw land loans | Current
Financing Receivable, Past Due [Line Items]
Loans	71,768
Other construction, land development and raw land loans | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		81,918
Obligations of states and political subdivisions in the US
Financing Receivable, Past Due [Line Items]
Loans	17,470
Greater Than 90 Days Past Due Still Accruing	0
Obligations of states and political subdivisions in the US | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		15,318
Greater Than 90 Days Past Due Still Accruing		0
Obligations of states and political subdivisions in the US | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Obligations of states and political subdivisions in the US | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Obligations of states and political subdivisions in the US | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Obligations of states and political subdivisions in the US | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Obligations of states and political subdivisions in the US | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Obligations of states and political subdivisions in the US | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Obligations of states and political subdivisions in the US | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Obligations of states and political subdivisions in the US | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Obligations of states and political subdivisions in the US | Current
Financing Receivable, Past Due [Line Items]
Loans	17,470
Obligations of states and political subdivisions in the US | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		15,318
Agricultural production, including commercial fishing
Financing Receivable, Past Due [Line Items]
Loans	27,573
Greater Than 90 Days Past Due Still Accruing	0
Agricultural production, including commercial fishing | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		12,968
Greater Than 90 Days Past Due Still Accruing		0
Agricultural production, including commercial fishing | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Agricultural production, including commercial fishing | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Agricultural production, including commercial fishing | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Agricultural production, including commercial fishing | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Agricultural production, including commercial fishing | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Agricultural production, including commercial fishing | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Agricultural production, including commercial fishing | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Agricultural production, including commercial fishing | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Agricultural production, including commercial fishing | Current
Financing Receivable, Past Due [Line Items]
Loans	27,573
Agricultural production, including commercial fishing | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		12,968
Consumer
Financing Receivable, Past Due [Line Items]
Loans	5,014
Greater Than 90 Days Past Due Still Accruing	0
Consumer | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		5,734
Greater Than 90 Days Past Due Still Accruing		0
Consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Consumer | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		272
Consumer | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Consumer | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Consumer | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Consumer | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Consumer | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Consumer | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		272
Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans	5,014
Consumer | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		5,462
Other loans
Financing Receivable, Past Due [Line Items]
Loans	3,020	0
Greater Than 90 Days Past Due Still Accruing	0
Other loans | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		4,390
Greater Than 90 Days Past Due Still Accruing		0
Other loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Other loans | Total Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Other loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Other loans | 30-59 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Other loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Other loans | 60-89 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Other loans | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Other loans | Greater Than 90 Days Past Due | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		0
Other loans | Current
Financing Receivable, Past Due [Line Items]
Loans	$ 3,020
Other loans | Current | Cumulative effect, period of adoption, adjusted balance
Financing Receivable, Past Due [Line Items]
Loans		$ 4,390