Loans and Allowance for Credit Losses - Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 9,609	$ 11,650
Nonaccrual With No ACL	9,388	11,542
Government guarantees
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	907	978
Nonaccrual With No ACL	907	978
Net of government guarantees
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	8,702	10,672
Nonaccrual With No ACL	8,481	10,564
Commercial & industrial loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	4,014	4,350
Nonaccrual With No ACL	3,847	4,298
Commercial real estate | Owner occupied properties
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,362	3,506
Nonaccrual With No ACL	3,362	3,506
Residential real estate | 1-4 family residential properties secured by first liens
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	223	1,778
Nonaccrual With No ACL	223	1,778
Residential real estate | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	265	271
Nonaccrual With No ACL	211	215
Residential real estate | 1-4 family residential construction loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	109	109
Nonaccrual With No ACL	109	109
Other construction, land development and raw land loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,636	1,636
Nonaccrual With No ACL	1,636	1,636
Consumer loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0	0
Nonaccrual With No ACL	$ 0	$ 0