Loans and Leases and the Allowance for Credit Losses - Summary of Payment Status of Loans Modified (Detail) $ in Thousands	Sep. 30, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 1,114,412
30-89 Days Past Due	55,643
Past Due 90 Days or More	28,011
Total	1,198,066
Commercial, Financial, Leasing, etc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	81,558
30-89 Days Past Due	2,326
Past Due 90 Days or More	11,739
Total	95,623
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	433,428
30-89 Days Past Due	19,022
Past Due 90 Days or More	1,995
Total	454,445
Residential Builder and Developer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	70,683
Total	70,683
Other Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	439,921
Total	439,921
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	79,331
30-89 Days Past Due	33,344
Past Due 90 Days or More	12,482
Total	125,157
Residential Limited Documentation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	7,943
30-89 Days Past Due	932
Past Due 90 Days or More	1,795
Total	10,670
Home Equity Lines and Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,034
30-89 Days Past Due	19
Total	1,053
Recreational Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	240
Total	240
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	274
Total	$ 274