v3.26.1
Loans and ACL - Summary of financial effects of TLMs (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Commercial And Industrial [Member] | Extended Maturity [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Weighted Average Term Extension   20 months
Commercial And Industrial [Member] | Payment Deferral [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Weighted average payment amount   $ 0
Commercial And Industrial [Member] | Interest Forgiveness [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Weighted average payment amount   $ 0
Real Estate Loan [Member] | Residential [Member] | Extended Maturity [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Weighted Average Term Extension 0 months 0 years
Real Estate Loan [Member] | Residential [Member] | Payment Deferral [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Weighted average payment amount $ 50 $ 0
Real Estate Loan [Member] | Residential [Member] | Interest Forgiveness [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Weighted average payment amount $ 0 $ 50