v3.26.1
Loans - Loans (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Loans:            
Loans - Gross $ 2,705,886   $ 2,713,470      
Less: Net deferred loan fees and costs (1,419)   (1,511)      
Loans after net deferred loan fees and costs 2,704,467   2,711,959      
Less: Allowance for credit losses (27,941) $ (27,830) (27,688) $ (26,977) $ (26,352) $ (25,826)
Plus: Basis adjustment related to fair value hedges 546   1,719      
Loans - Net 2,677,072   2,685,990      
Consumer Real Estate [Member]            
Loans:            
Loans - Gross 533,438   526,439      
Less: Allowance for credit losses (5,053) (4,599) (4,266) (3,653) (3,683) (3,543)
Agricultural Real Estate [Member]            
Loans:            
Loans - Gross 208,223   217,034      
Less: Allowance for credit losses (946) (1,092) (735) (738) (771) (895)
Agricultural [Member]            
Loans:            
Loans - Gross 244,611   218,050      
Less: Allowance for credit losses (866) (516) (474) (334) (306) (285)
Commercial Real Estate [Member]            
Loans:            
Loans - Gross 1,308,600   1,355,571      
Less: Allowance for credit losses (15,894) (16,282) (17,428) (17,354) (16,907) (16,560)
Commercial and Industrial [Member]            
Loans:            
Loans - Gross 337,487   314,405      
Consumer [Member]            
Loans:            
Loans - Gross 50,953   58,838      
Less: Allowance for credit losses (1,147) $ (1,316) (953) $ (945) $ (952) $ (1,012)
Other Loan [Member]            
Loans:            
Loans - Gross $ 22,574   $ 23,133