v3.26.1
Loans and the Allowance for Credit Losses - Summary of Financial Impacts of Loan Modifications and Payment Deferrals to Portfolio Loans (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Home Equity [Member]        
Financing Receivable, Modified [Line Items]        
Weighted-average term extension (in months) 120 months   120 months  
Commercial and Industrial [Member]        
Financing Receivable, Modified [Line Items]        
Weighted-average term extension (in months) 5 months 7 months 6 months 13 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
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]        
Financing Receivable, Modified [Line Items]        
Weighted-average term extension (in months) 14 months   14 months 9 months