v3.26.1
Loans and Allowance for Credit Losses - Summary of Nonaccrual Interest Income Written Off (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Financing Receivable, Past Due [Line Items]    
Non-accrual interest income written off $ 250 $ 38
Commercial Real Estate [Member]    
Financing Receivable, Past Due [Line Items]    
Non-accrual interest income written off 49 10
Commercial and Industrial [Member]    
Financing Receivable, Past Due [Line Items]    
Non-accrual interest income written off 175 10
Residential Real Estate [Member]    
Financing Receivable, Past Due [Line Items]    
Non-accrual interest income written off 10 8
Agricultural Real Estate [Member]    
Financing Receivable, Past Due [Line Items]    
Non-accrual interest income written off 10 2
Agricultural [Member]    
Financing Receivable, Past Due [Line Items]    
Non-accrual interest income written off 4 3
Consumer [Member]    
Financing Receivable, Past Due [Line Items]    
Non-accrual interest income written off $ 2 $ 5