Loans and Leases and the Allowance for Credit Losses - Summary of Payment Status of Loans Modified (Detail) $ in Thousands	Jun. 30, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 613,229
30-89 Days Past Due	20,816
Past Due 90 Days or More	6,283	[1]
Total	640,328
Commercial, Financial, Leasing, etc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	60,448
30-89 Days Past Due	3,716
Past Due 90 Days or More	117	[1]
Total	64,281
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	177,753
30-89 Days Past Due	426
Past Due 90 Days or More	1,396	[1]
Total	179,575
Residential Builder and Developer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	90,708
Total	90,708
Other Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	222,818
30-89 Days Past Due	276
Total	223,094
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	53,545	[2]
30-89 Days Past Due	14,798	[2]
Past Due 90 Days or More	4,154	[1],[2]
Total	72,497	[2]
Residential Limited Documentation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,745
30-89 Days Past Due	1,600
Past Due 90 Days or More	616	[1]
Total	8,961
Home Equity Lines and Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	785
Total	785
Recreational Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	203
Total	203
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	224
Total	$ 224

[1] Predominantly loan modifications with payment deferrals.

[2] Includes loans guaranteed by government-related entities classified as 30-89 days past due of $11 million and as past due 90 days or more of $4 million