Loans and Allowance for Credit Losses - Activity in ACL Related to Loans Held for Investment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 11,310	$ 14,764	$ 11,739	$ 16,625
Credit Loss Expense (Benefit)	273	(161)	106	(2,066)
Charge-offs	(166)	(110)	(461)	(273)
Recoveries	120	46	153	253
Ending Balance	11,537	14,539	11,537	14,539
Commercial & industrial loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,901	4,269	3,027	4,348
Credit Loss Expense (Benefit)	123	105	279	4
Charge-offs	(166)	(110)	(461)	(273)
Recoveries	103	27	116	212
Ending Balance	2,961	4,291	2,961	4,291
Commercial real estate | Owner occupied properties
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,513	3,366	3,176	3,579
Credit Loss Expense (Benefit)	60	(28)	(603)	(243)
Charge-offs	0	0	0	0
Recoveries	0	2	0	4
Ending Balance	2,573	3,340	2,573	3,340
Commercial real estate | Non-owner occupied and multifamily properties
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	3,063	3,704	2,930	4,944
Credit Loss Expense (Benefit)	44	137	177	(1,103)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	3,107	3,841	3,107	3,841
Residential real estate | 1-4 family residential properties secured by first liens
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	510	813	439	673
Credit Loss Expense (Benefit)	110	(183)	181	(43)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	620	630	620	630
Residential real estate | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	301	342	215	419
Credit Loss Expense (Benefit)	17	(12)	91	(99)
Charge-offs	0	0	0	0
Recoveries	9	10	21	20
Ending Balance	327	340	327	340
Residential real estate | 1-4 family residential construction loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	210	260	120	454
Credit Loss Expense (Benefit)	21	(29)	111	(223)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	231	231	231	231
Other construction, land development and raw land loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,550	1,821	1,635	1,994
Credit Loss Expense (Benefit)	(88)	(151)	(173)	(324)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	1,462	1,670	1,462	1,670
Obligations of states and political subdivisions in the US
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	52	36	32	44
Credit Loss Expense (Benefit)	7	3	27	(5)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	59	39	59	39
Agricultural production, including commercial fishing
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	128	46	91	49
Credit Loss Expense (Benefit)	(8)	4	21	(7)
Charge-offs	0	0	0	0
Recoveries	7	7	15	15
Ending Balance	127	57	127	57
Consumer loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	75	104	67	118
Credit Loss Expense (Benefit)	(12)	(10)	(4)	(26)
Charge-offs	0	0	0	0
Recoveries	1	0	1	2
Ending Balance	64	94	64	94
Other loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	7	3	7	3
Credit Loss Expense (Benefit)	(1)	3	(1)	3
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	$ 6	$ 6	$ 6	$ 6