v3.26.3
Loans - Loans (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Loans:            
Loans - Gross $ 2,738,954   $ 2,713,470      
Less: Net deferred loan fees and costs (1,635)   (1,511)      
Loans after net deferred loan fees and costs 2,737,319   2,711,959      
Less: Allowance for credit losses (27,802) $ (27,941) (27,688) $ (27,475) $ (26,977) $ (25,826)
Plus: Basis adjustment related to fair value hedges (159)   1,719      
Loans - Net 2,709,358   2,685,990      
Consumer Real Estate [Member]            
Loans:            
Loans - Gross 548,913   526,439      
Less: Allowance for credit losses (5,218) (5,053) (4,266) (4,129) (3,653) (3,543)
Agricultural Real Estate [Member]            
Loans:            
Loans - Gross 210,321   217,034      
Less: Allowance for credit losses (805) (946) (735) (756) (738) (895)
Agricultural [Member]            
Loans:            
Loans - Gross 245,639   218,050      
Less: Allowance for credit losses (838) (866) (474) (416) (334) (285)
Commercial Real Estate [Member]            
Loans:            
Loans - Gross 1,321,021   1,355,571      
Less: Allowance for credit losses (15,940) (15,894) (17,428) (16,901) (17,354) (16,560)
Commercial and Industrial [Member]            
Loans:            
Loans - Gross 343,720   314,405      
Consumer [Member]            
Loans:            
Loans - Gross 47,251   58,838      
Less: Allowance for credit losses (1,041) $ (1,147) (953) $ (969) $ (945) $ (1,012)
Other Loan [Member]            
Loans:            
Loans - Gross $ 22,089   $ 23,133