v3.26.3
Loans and the Allowance for Credit Losses - Summary of Financial Impacts of Loan Modifications and Payment Deferrals to Portfolio Loans (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Commercial and Industrial [Member]        
Financing Receivable, Modified [Line Items]        
Weighted-average term extension (in months) 10 months 9 months 9 months 12 months
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]        
Financing Receivable, Modified [Line Items]        
Weighted-average term extension (in months)   6 months   6 months
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]        
Financing Receivable, Modified [Line Items]        
Weighted-average term extension (in months) 4 months 7 months 8 months 8 months