v3.26.1
Fair Value Disclosures - Quantitative Information about Level 3 Fair Value Measurements (Detail) - Impaired Loans [Member]
6 Months Ended
Jun. 30, 2026
Fair Value Inputs, Assets, Quantitative Information [Line Items]  
Valuation Technique Discounted appraisals
Minimum [Member]  
Fair Value Inputs, Assets, Quantitative Information [Line Items]  
Fair value inputs discount rate and estimated costs to sell 5.00%
Maximum [Member]  
Fair Value Inputs, Assets, Quantitative Information [Line Items]  
Fair value inputs discount rate and estimated costs to sell 20.00%