Loans and Allowance for Credit Losses - Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 11,650	$ 11,120
Nonaccrual With No ACL	11,542	10,723
Government guarantees
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	978	1,483
Nonaccrual With No ACL	978	1,483
Net of government guarantees
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	10,672	9,637
Nonaccrual With No ACL	10,564	9,240
Commercial & industrial loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	4,350	3,848
Nonaccrual With No ACL	4,298	3,513
Commercial real estate | Owner occupied properties
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,506	4,620
Nonaccrual With No ACL	3,506	4,582
Residential real estate | 1-4 family residential properties secured by first liens
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,778	160
Nonaccrual With No ACL	1,778	160
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	271	242
Nonaccrual With No ACL	215	221
Residential real estate | 1-4 family residential construction loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	109	702
Nonaccrual With No ACL	109	702
Other construction, land development and raw land loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,636	1,545
Nonaccrual With No ACL	1,636	1,545
Consumer loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0	3
Nonaccrual With No ACL	$ 0	$ 0