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Loans, Loans Portfolio by Credit Quality Indicators (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans, net of deferred origination costs (fees) $ 1,656,354     $ 1,723,471  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 21,438     181,426  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 177,431     330,978  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year       300,111  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year       189,100  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year       119,511  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year       394,391  
Financing Receivable, Excluding Accrued Interest, Revolving 211,653     201,785  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     6,169  
Loans and Leases Receivable, Net of Deferred Income 1,656,354     1,723,471 $ 1,401,278
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 78 $ 36      
Consumer          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans, net of deferred origination costs (fees) 24,159     25,600  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 1,834     8,087  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 7,269     5,820  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 5,182     4,868  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 4,252     4,671  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 3,881     1,390  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,287     304  
Financing Receivable, Excluding Accrued Interest, Revolving 454     460  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 24,159     25,600  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff 0   $ 0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0   62    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 2   21    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff 1   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 3 5 83    
Commercial Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans, net of deferred origination costs (fees) 122,357     120,541  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 2,593     17,169  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 16,629     32,331  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 32,547     31,061  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 30,425     11,531  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 10,832     4,324  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 11,066     5,778  
Financing Receivable, Excluding Accrued Interest, Revolving 18,265     18,234  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     113  
Loans and Leases Receivable, Net of Deferred Income 122,357     120,541  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff 0   15    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 0 0 15    
Commercial Real Estate Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 10,437     99,055  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 103,123     208,406  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 197,056     156,865  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 154,319     109,810  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 104,355     94,543  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 377,748     289,555  
Financing Receivable, Excluding Accrued Interest, Revolving 150,620     141,354  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     6,056  
Loans and Leases Receivable, Net of Deferred Income 1,097,658     1,105,644  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 0 0 0    
Residential Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 6,574     55,232  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 48,822     83,957  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 64,354     107,120  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 85,161     62,394  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 51,708     19,208  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 109,250     98,723  
Financing Receivable, Excluding Accrued Interest, Revolving 33,544     33,970  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 399,413     460,604  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0   4    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 0 0 4    
Agricultural          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans, net of deferred origination costs (fees) 12,694     11,000  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     1,883  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,588     464  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 432     197  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 194     694  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 723     46  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,060     31  
Financing Receivable, Excluding Accrued Interest, Revolving 8,697     7,685  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 12,694     11,000  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 0 0 0    
Other          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans, net of deferred origination costs (fees) 73     82  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 73     82  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 73     82  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff 75   166    
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff 0   0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 75 $ 31 $ 166    
Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 299,571        
Pass | Consumer          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 1,834     8,087  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 7,269     5,820  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 5,110     4,868  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 4,252     4,671  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 3,881     1,382  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,279     304  
Financing Receivable, Excluding Accrued Interest, Revolving 253     460  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 23,878     25,592  
Pass | Commercial Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 2,593     17,169  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 16,629     30,518  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 30,732     29,587  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 28,954     11,426  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 10,733     2,732  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 7,704     5,641  
Financing Receivable, Excluding Accrued Interest, Revolving 17,715     16,919  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     113  
Loans and Leases Receivable, Net of Deferred Income 115,060     114,105  
Pass | Commercial Real Estate Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 10,437     99,055  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 103,123     200,735  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 186,745     156,865  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 154,319     109,810  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 104,355     92,895  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 369,284     283,564  
Financing Receivable, Excluding Accrued Interest, Revolving 150,620     141,354  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     6,056  
Loans and Leases Receivable, Net of Deferred Income 1,078,883     1,090,334  
Pass | Residential Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 6,574     55,232  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 48,822     83,511  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 64,354     107,120  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 84,862     62,177  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 51,177     19,208  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 106,384     95,643  
Financing Receivable, Excluding Accrued Interest, Revolving 33,412     33,800  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 395,585     456,691  
Pass | Agricultural          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     1,883  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,588     464  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 432     197  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 194     694  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 723     46  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,060     31  
Financing Receivable, Excluding Accrued Interest, Revolving 8,697     7,685  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 12,694     11,000  
Pass | Other          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 73     82  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 73     82  
OAEM          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 274,351        
OAEM | Consumer          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
OAEM | Commercial Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     1,474  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 1,471     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 1,471     1,474  
OAEM | Commercial Real Estate Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     7,671  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 2,707     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 3,881     3,004  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 6,588     10,675  
OAEM | Residential Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 215     18  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 215     18  
OAEM | Agricultural          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
OAEM | Other          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 171,499        
Substandard | Consumer          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 72     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     8  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 8     0  
Financing Receivable, Excluding Accrued Interest, Revolving 201     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 281     8  
Substandard | Commercial Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     1,813  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 1,815     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     105  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 99     1,592  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 3,362     137  
Financing Receivable, Excluding Accrued Interest, Revolving 550     1,315  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 5,826     4,962  
Substandard | Commercial Real Estate Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 7,604     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     1,648  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 4,583     2,987  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 12,187     4,635  
Substandard | Residential Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     446  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 299     217  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 531     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 2,651     3,062  
Financing Receivable, Excluding Accrued Interest, Revolving 132     170  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 3,613     3,895  
Substandard | Agricultural          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Substandard | Other          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 500,411        
Doubtful | Consumer          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Doubtful | Commercial Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Doubtful | Commercial Real Estate Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Doubtful | Residential Portfolio Segment          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Doubtful | Agricultural          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income 0     0  
Doubtful | Other          
Financing Receivable, Credit Quality Indicator [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0     0  
Loans and Leases Receivable, Net of Deferred Income $ 0     $ 0