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Loans, Loans Portfolio by Credit Quality Indicators (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]              
Loans, net of deferred origination costs (fees) $ 1,736,747   $ 1,736,747     $ 1,723,471  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 48,651   48,651     181,426  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 191,631   191,631     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 219,909   219,909     201,785  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     6,169  
Loans and Leases Receivable, Net of Deferred Income 1,736,747   1,736,747     1,723,471 $ 1,401,278
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 86 $ 49 164 $ 85      
Consumer              
Financing Receivable, Credit Quality Indicator [Line Items]              
Loans, net of deferred origination costs (fees) 22,935   22,935     25,600  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 3,759   3,759     8,087  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 6,531   6,531     5,820  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 4,525   4,525     4,868  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 3,710   3,710     4,671  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 3,153   3,153     1,390  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 979   979     304  
Financing Receivable, Excluding Accrued Interest, Revolving 278   278     460  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 22,935   22,935     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     1   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff     39   62    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff     3   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     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 40 4 43 9 83    
Commercial Portfolio Segment              
Financing Receivable, Credit Quality Indicator [Line Items]              
Loans, net of deferred origination costs (fees) 125,858   125,858     120,541  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 8,547   8,547     17,169  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 16,206   16,206     32,331  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 37,691   37,691     31,061  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 28,356   28,356     11,531  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 10,143   10,143     4,324  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 7,176   7,176     5,778  
Financing Receivable, Excluding Accrued Interest, Revolving 17,739   17,739     18,234  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     113  
Loans and Leases Receivable, Net of Deferred Income 125,858   125,858     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 15 0 15 15    
Commercial Real Estate Portfolio Segment              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 18,404   18,404     99,055  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 105,556   105,556     208,406  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 203,057   203,057     156,865  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 163,075   163,075     109,810  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 104,000   104,000     94,543  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 368,213   368,213     289,555  
Financing Receivable, Excluding Accrued Interest, Revolving 153,540   153,540     141,354  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     6,056  
Loans and Leases Receivable, Net of Deferred Income 1,115,845   1,115,845     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 0 0    
Residential Portfolio Segment              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 17,882   17,882     55,232  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 61,844   61,844     83,957  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 76,161   76,161     107,120  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 91,528   91,528     62,394  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 55,593   55,593     19,208  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 118,136   118,136     98,723  
Financing Receivable, Excluding Accrued Interest, Revolving 38,985   38,985     33,970  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 460,129   460,129     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 0 0 4    
Agricultural              
Financing Receivable, Credit Quality Indicator [Line Items]              
Loans, net of deferred origination costs (fees) 11,747   11,747     11,000  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 59   59     1,883  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,494   1,494     464  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 411   411     197  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 156   156     694  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 465   465     46  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 28   28     31  
Financing Receivable, Excluding Accrued Interest, Revolving 9,134   9,134     7,685  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 11,747   11,747     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 0 0    
Other              
Financing Receivable, Credit Quality Indicator [Line Items]              
Loans, net of deferred origination costs (fees) 233   233     82  
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 233   233     82  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 233   233     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     121   166    
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff     0   0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 46 $ 30 121 $ 61 $ 166    
Pass              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 321,845   321,845        
Pass | Consumer              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 3,759   3,759     8,087  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 6,531   6,531     5,820  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 4,499   4,499     4,868  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 3,710   3,710     4,671  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 3,140   3,140     1,382  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 973   973     304  
Financing Receivable, Excluding Accrued Interest, Revolving 278   278     460  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 22,890   22,890     25,592  
Pass | Commercial Portfolio Segment              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 8,547   8,547     17,169  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 16,206   16,206     30,518  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 33,901   33,901     29,587  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 28,334   28,334     11,426  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 10,049   10,049     2,732  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 7,065   7,065     5,641  
Financing Receivable, Excluding Accrued Interest, Revolving 17,340   17,340     16,919  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     113  
Loans and Leases Receivable, Net of Deferred Income 121,442   121,442     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 18,404   18,404     99,055  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 105,556   105,556     200,735  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 192,828   192,828     156,865  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 163,075   163,075     109,810  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 104,000   104,000     92,895  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 363,476   363,476     283,564  
Financing Receivable, Excluding Accrued Interest, Revolving 153,540   153,540     141,354  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     6,056  
Loans and Leases Receivable, Net of Deferred Income 1,100,879   1,100,879     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 17,882   17,882     55,232  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 61,613   61,613     83,511  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 75,968   75,968     107,120  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 91,234   91,234     62,177  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 55,100   55,100     19,208  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 114,999   114,999     95,643  
Financing Receivable, Excluding Accrued Interest, Revolving 38,826   38,826     33,800  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 455,622   455,622     456,691  
Pass | Agricultural              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 59   59     1,883  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,494   1,494     464  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 411   411     197  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 156   156     694  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 395   395     46  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 28   28     31  
Financing Receivable, Excluding Accrued Interest, Revolving 9,134   9,134     7,685  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 11,677   11,677     11,000  
Pass | Other              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 233   233     82  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 233   233     82  
OAEM              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 286,825   286,825        
OAEM | Consumer              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 1,971   1,971     1,474  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 1,971   1,971     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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     7,671  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 2,692   2,692     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 891   891     3,004  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 3,583   3,583     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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 241   241     18  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 241   241     18  
OAEM | Agricultural              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   0     0  
OAEM | Other              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   0     0  
Substandard              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 173,354   173,354        
Substandard | Consumer              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 26   26     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 13   13     8  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 6   6     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 45   45     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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     1,813  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 1,819   1,819     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 22   22     105  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 94   94     1,592  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 111   111     137  
Financing Receivable, Excluding Accrued Interest, Revolving 399   399     1,315  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 2,445   2,445     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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 7,537   7,537     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     1,648  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 3,846   3,846     2,987  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 11,383   11,383     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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 231   231     446  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 193   193     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 294   294     217  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 493   493     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 2,896   2,896     3,062  
Financing Receivable, Excluding Accrued Interest, Revolving 159   159     170  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 4,266   4,266     3,895  
Substandard | Agricultural              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 70   70     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 70   70     0  
Substandard | Other              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   0     0  
Doubtful              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 494,532   494,532        
Doubtful | Consumer              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   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     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   0     0  
Doubtful | Agricultural              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income 0   0     0  
Doubtful | Other              
Financing Receivable, Credit Quality Indicator [Line Items]              
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving 0   0     0  
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan 0   0     0  
Loans and Leases Receivable, Net of Deferred Income $ 0   $ 0     $ 0