Loans and Allowance for Credit Losses - Loan Segments Under the Legacy Segmentation and the New Segmentation (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		$ 1,455,785
Unearned loan fees, net	$ (17,800)	(11,735)
Total portfolio loans	1,548,924	1,444,050
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		780,058
Total portfolio loans	695,797	772,468
Commercial loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		619,304
Total portfolio loans		612,254
Real estate construction one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		38,467
Total portfolio loans		38,180
Real estate construction other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		80,315
Total portfolio loans		79,403
Real estate term owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		163,597
Total portfolio loans		162,724
Real estate term non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		309,074
Total portfolio loans		307,247
Real estate term other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		46,620
Total portfolio loans		46,230
Consumer secured by 1st deeds of trust
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		15,585
Total portfolio loans		15,548
Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		22,069
Total portfolio loans		22,250
Commercial real estate | Owner occupied properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	244,416
Commercial real estate | Owner occupied properties | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		234,364
Total portfolio loans		233,320
Commercial real estate | Non-owner occupied and multifamily properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	399,982
Commercial real estate | Non-owner occupied and multifamily properties | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		394,860
Total portfolio loans		392,452
Residential | 1-4 family residential properties secured by first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	31,930
Residential | 1-4 family residential properties secured by first liens | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		33,463
Total portfolio loans		33,415
Residential | 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	17,536
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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		18,114
Total portfolio loans		18,236
Residential | 1-4 family residential construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	35,051
Residential | 1-4 family residential construction loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		32,760
Total portfolio loans		32,500
Other construction, land development and raw land loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	86,574
Other construction, land development and raw land loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		84,352
Total portfolio loans		83,463
Obligations of states and political subdivisions in the US
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	15,795
Obligations of states and political subdivisions in the US | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		15,274
Total portfolio loans		15,318
Agricultural production, including commercial fishing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	12,901
Agricultural production, including commercial fishing | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		13,093
Total portfolio loans		12,968
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	5,563
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		5,794
Total portfolio loans		5,734
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	$ 3,379	0
Other loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subtotal		4,407
Total portfolio loans		$ 4,390