v3.26.1
Loans and Allowance for Credit Losses - Summary of Nonaccrual Interest Income Written Off (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Past Due [Line Items]        
Non-accrual interest income written off $ 881 $ 712 $ 1,131 $ 750
Commercial Real Estate [Member]        
Financing Receivable, Past Due [Line Items]        
Non-accrual interest income written off 224 54 273 64
Commercial and Industrial [Member]        
Financing Receivable, Past Due [Line Items]        
Non-accrual interest income written off 514 553 689 563
Residential Real Estate [Member]        
Financing Receivable, Past Due [Line Items]        
Non-accrual interest income written off 64 11 74 19
Agricultural Real Estate [Member]        
Financing Receivable, Past Due [Line Items]        
Non-accrual interest income written off 42 22 52 24
Agricultural [Member]        
Financing Receivable, Past Due [Line Items]        
Non-accrual interest income written off 34 67 38 70
Consumer [Member]        
Financing Receivable, Past Due [Line Items]        
Non-accrual interest income written off $ 3 $ 5 $ 5 $ 10