Allowance for Credit Losses - Summary of Amortized Cost Basis of Nonaccrual Loans and Loans Past due Over 89 Days Still Accruing (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	$ 2,293
Nonaccrual with a related Allowance for Credit Loss	0	$ 1,918
Loans past due over 89 days still accuring	393
Agriculture and Farmland [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	0
Construction [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	0
Commercial and Industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	14
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	51
Multifamily [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	0
Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	0
Non-owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	433
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	0
First Liens [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	1,246
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	244
Second Liens and Lines of Credit [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	44
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	98
Municipal [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	0
Consumer [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	51
Nonaccrual with a related Allowance for Credit Loss	0
Loans past due over 89 days still accuring	$ 0