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Loans and Allowance for Credit Losses - Allowance for Credit Losses and Balances in Loan Portfolio (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Mar. 01, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     $ 34,798 $ 16,152 $ 16,552 $ 15,685  
Acquisition related allowance for credit loss (PCD) $ 4,170 $ 4,924     4,924    
Charge-offs     (378) (189) (1,040) (640)  
Recoveries     134 102 306 345  
Provision     200 425 14,013 1,100  
Ending balance 34,754   34,754 16,490 34,754 16,490  
Individually evaluated for credit loss 3,591   3,591 88 3,591 88  
Collectively evaluated for credit loss 31,163   31,163 16,402 31,163 16,402  
Individually evaluated for impairment 15,632   15,632   15,632    
Collectively evaluated for impairment 2,894,296   2,894,296   2,894,296    
Loans 2,909,928   2,909,928   2,909,928   $ 1,545,640
Agricultural [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     219 112 90 94  
Acquisition related allowance for credit loss (PCD) 2 2     2    
Charge-offs     0 0 0 0  
Recoveries     0 0 0 0  
Provision     14 (2) 141 16  
Ending balance 233   233 110 233 110  
Individually evaluated for credit loss 0   0 1 0 1  
Collectively evaluated for credit loss 233   233 109 233 109  
Individually evaluated for impairment 5   5   5    
Collectively evaluated for impairment 51,178   51,178   51,178    
Loans 51,183   51,183   51,183   48,221
Commercial and Industrial [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     5,240 2,161 2,260 2,216  
Acquisition related allowance for credit loss (PCD) 2,934 2,960     2,963    
Charge-offs     0 0 (9) (1)  
Recoveries     2 2 8 13  
Provision     1,055 307 1,075 242  
Ending balance 6,297   6,297 2,470 6,297 2,470  
Individually evaluated for credit loss 2,916   2,916 7 2,916 7  
Collectively evaluated for credit loss 3,382   3,382 2,463 3,382 2,463  
Individually evaluated for impairment 8,176   8,176   8,176    
Collectively evaluated for impairment 344,700   344,700   344,700    
Loans 352,876   352,876   352,876   228,256
Consumer Portfolio Segment [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     772 795 733 823  
Acquisition related allowance for credit loss (PCD) 0 $ 0     0    
Charge-offs     (193) (166) (586) (616)  
Recoveries     131 96 273 321  
Provision     26 36 316 233  
Ending balance 736   736 761 736 761  
Individually evaluated for credit loss 0   0 1 0 1  
Collectively evaluated for credit loss 736   736 760 736 760  
Individually evaluated for impairment 1   1   1    
Collectively evaluated for impairment 27,327   27,327   27,327    
Loans 27,328   27,328   27,328   29,412
Commercial Real Estate Portfolio Segment [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     18,311 9,360 9,460 8,820  
Acquisition related allowance for credit loss (PCD)         1,791    
Charge-offs     (185) 0 (393) 0  
Recoveries     0 0 0 0  
Provision     (551) (140) 6,717 400  
Ending balance 17,575   17,575 9,220 17,575 9,220  
Individually evaluated for credit loss 637   637 1 637 1  
Collectively evaluated for credit loss 16,938   16,938 9,219 16,938 9,219  
Individually evaluated for impairment 4,506   4,506   4,506    
Collectively evaluated for impairment 1,724,268   1,724,268   1,724,268    
Loans 1,728,774   1,728,774   1,728,774   901,130
Construction Real Estate [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     90 49 59 58  
Acquisition related allowance for credit loss (PCD)         0    
Charge-offs     0 0 0 0  
Recoveries     0 0 0 0  
Provision     (7) (13) 24 (22)  
Ending balance 83   83 36 83 36  
Individually evaluated for credit loss 0   0 0 0 0  
Collectively evaluated for credit loss 82   82 36 82 36  
Individually evaluated for impairment 0   0   0    
Collectively evaluated for impairment 18,441   18,441   18,441    
Loans 18,441   18,441   18,441   17,042
Residential Portfolio Segment [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     10,161 3,625 3,890 3,644  
Acquisition related allowance for credit loss (PCD)         168    
Charge-offs     0 (23) (52) (23)  
Recoveries     1 4 25 11  
Provision     (336) 227 5,795 201  
Ending balance 9,826   9,826 3,833 9,826 3,833  
Individually evaluated for credit loss 38   38 78 38 78  
Collectively evaluated for credit loss 9,788   9,788 3,755 9,788 3,755  
Individually evaluated for impairment 2,944   2,944   2,944    
Collectively evaluated for impairment 725,899   725,899   725,899    
Loans 728,843   728,843   728,843   281,701
Loans to other financial institutions [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Beginning balance     5 50 60 30  
Acquisition related allowance for credit loss (PCD)         0    
Charge-offs     0 0 0 0  
Recoveries     0 0 0 0  
Provision     (1) 10 (56) 30  
Ending balance 4   4 60 4 60  
Individually evaluated for credit loss 0   0 0 0 0  
Collectively evaluated for credit loss 4   4 $ 60 4 $ 60  
Individually evaluated for impairment 0   0   0    
Collectively evaluated for impairment 2,483   2,483   2,483    
Loans $ 2,483   $ 2,483   $ 2,483   $ 39,878