v3.26.3
Loans - Allowance for Credit Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Loans [Abstract]          
Balance at beginning of period $ 23,559 $ 22,109 $ 22,806 $ 21,699 $ 21,699
Charge-offs (148) (20) (300) (801)  
Recoveries 9 17 192 71  
Provision 366 348 1,088 1,485  
Balance at end of period 23,786 22,454 23,786 22,454 22,806
Residential [Member]          
Loans [Abstract]          
Charge-offs     0   0
Commercial [Member]          
Loans [Abstract]          
Charge-offs     0   (40)
Construction [Member]          
Loans [Abstract]          
Charge-offs     0   0
Real Estate Loans [Member] | Residential [Member]          
Loans [Abstract]          
Balance at beginning of period 2,671 3,062 3,112 1,940 1,940
Charge-offs 0 0 0 0  
Recoveries 0 0 12 0  
Provision (64) 148 (517) 1,270  
Balance at end of period 2,607 3,210 2,607 3,210 3,112
Real Estate Loans [Member] | Commercial [Member]          
Loans [Abstract]          
Balance at beginning of period 11,006 9,898 10,017 9,174 9,174
Charge-offs 0 0 0 (40)  
Recoveries 0 0 0 0  
Provision 696 (445) 1,685 319  
Balance at end of period 11,702 9,453 11,702 9,453 10,017
Real Estate Loans [Member] | Agricultural [Member]          
Loans [Abstract]          
Balance at beginning of period 4,411 4,542 4,841 3,529 3,529
Charge-offs 0 0 0 0  
Recoveries 0 0 0 0  
Provision 274 262 (156) 1,275  
Balance at end of period 4,685 4,804 4,685 4,804 4,841
Real Estate Loans [Member] | Construction [Member]          
Loans [Abstract]          
Balance at beginning of period 913 1,273 916 1,402 1,402
Charge-offs 0 0 0 0  
Recoveries 0 0 0 0  
Provision 108 (306) 105 (435)  
Balance at end of period 1,021 967 1,021 967 916
Consumer [Member]          
Loans [Abstract]          
Balance at beginning of period 1,191 1,119 1,201 1,338 1,338
Charge-offs (13) (10) (33) (307)  
Recoveries 6 4 18 37  
Provision (586) 212 (588) 257  
Balance at end of period 598 1,325 598 1,325 1,201
Other Commercial Loans [Member]          
Loans [Abstract]          
Balance at beginning of period 3,037 1,993 2,534 3,766 3,766
Charge-offs (135) (10) (267) (454) (491)
Recoveries 3 13 162 34  
Provision (260) 435 216 (915)  
Balance at end of period 2,645 2,431 2,645 2,431 2,534
Other Agricultural Loans [Member]          
Loans [Abstract]          
Balance at beginning of period 190 132 115 133 133
Charge-offs 0 0 0 0 0
Recoveries 0 0 0 0  
Provision 28 (7) 103 (8)  
Balance at end of period 218 125 218 125 115
State and Political Subdivision Loans [Member]          
Loans [Abstract]          
Balance at beginning of period 106 56 55 61 61
Charge-offs 0 0 0 0 0
Recoveries 0 0 0 0  
Provision 15 2 66 (3)  
Balance at end of period 121 58 121 58 55
Unallocated [Member]          
Loans [Abstract]          
Balance at beginning of period 34 34 15 356 356
Charge-offs 0 0 0 0  
Recoveries 0 0 0 0  
Provision 155 47 174 (275)  
Balance at end of period $ 189 $ 81 $ 189 $ 81 $ 15