v3.26.1
Note 4 - Loans and Allowance for Credit Losses - Schedule of Financing Receivable Credit Quality Indicators (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Current Fiscal Year $ 344,938   $ 344,938   $ 517,639
Fiscal Year before Current Fiscal Year 492,832   492,832   689,272
Two Years before Current Fiscal Year 619,816   619,816   559,773
Three Years before Current Fiscal Year 513,048   513,048   690,039
Four Years before Current Fiscal Year 591,078   591,078   431,279
More than Four Years before Current Fiscal Year 992,108   992,108   684,473
Revolving 480,424   480,424   475,547
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 4,034,244   4,034,244   4,048,022
Gross charge-offs current year 0       0
Gross charge-offs, prior year 346       523
Gross charge-offs, two years before 2,109       199
Gross charge-offs, three years before 809       1,786
Gross charge-offs, four years before 0       787
Gross charge-offs, more than five years before 226       2,453
Gross charge-offs, revolving 0       0
Gross charge-offs 3,490 $ 3,918 10,936 $ 4,730 5,748
Commercial Real Estate Portfolio Segment [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,335,092   1,335,092   1,505,605
Commercial Borrower [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,824,861   2,824,861   2,796,997
Gross charge-offs 2,738 3,870 9,859 4,039  
Commercial Borrower [Member] | Commercial Portfolio Segment [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,382,200   1,382,200   1,164,093
Gross charge-offs 2,188 85 8,753 254  
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial Portfolio Segments [Member]          
Current Fiscal Year 136,672   136,672   244,462
Fiscal Year before Current Fiscal Year 217,017   217,017   139,982
Two Years before Current Fiscal Year 93,176   93,176   72,958
Three Years before Current Fiscal Year 67,892   67,892   46,781
Four Years before Current Fiscal Year 33,168   33,168   22,329
More than Four Years before Current Fiscal Year 60,080   60,080   58,073
Revolving 151,954   151,954   152,248
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 759,959   759,959   736,833
Gross charge-offs current year 0       0
Gross charge-offs, prior year 341       407
Gross charge-offs, two years before 1,544       152
Gross charge-offs, three years before 255       10
Gross charge-offs, four years before 0       5
Gross charge-offs, more than five years before 48       342
Gross charge-offs, revolving 0       0
Gross charge-offs 2,188 79 8,753 248 916
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial Portfolio Segments [Member] | Pass [Member]          
Current Fiscal Year 136,672   136,672   242,893
Fiscal Year before Current Fiscal Year 214,306   214,306   131,308
Two Years before Current Fiscal Year 91,015   91,015   67,934
Three Years before Current Fiscal Year 54,282   54,282   43,513
Four Years before Current Fiscal Year 32,209   32,209   21,143
More than Four Years before Current Fiscal Year 57,764   57,764   51,586
Revolving 150,141   150,141   145,133
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 736,389   736,389   703,510
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial Portfolio Segments [Member] | Special Mention [Member]          
Current Fiscal Year 0   0   316
Fiscal Year before Current Fiscal Year 2,350   2,350   10
Two Years before Current Fiscal Year 8   8   560
Three Years before Current Fiscal Year 19   19   0
Four Years before Current Fiscal Year 150   150   0
More than Four Years before Current Fiscal Year 88   88   28
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,615   2,615   914
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial Portfolio Segments [Member] | Substandard [Member]          
Current Fiscal Year 0   0   35
Fiscal Year before Current Fiscal Year 361   361   26
Two Years before Current Fiscal Year 685   685   2,701
Three Years before Current Fiscal Year 13,435   13,435   2,970
Four Years before Current Fiscal Year 809   809   1,072
More than Four Years before Current Fiscal Year 2,228   2,228   6,459
Revolving 1,813   1,813   7,115
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 19,331   19,331   20,378
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial Portfolio Segments [Member] | Doubtful [Member]          
Current Fiscal Year 0   0   1,218
Fiscal Year before Current Fiscal Year 0   0   8,638
Two Years before Current Fiscal Year 1,468   1,468   1,763
Three Years before Current Fiscal Year 156   156   298
Four Years before Current Fiscal Year 0   0   114
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,624   1,624   12,031
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Owner Occupied Loans [Member]          
Current Fiscal Year 88,390   88,390   42,468
Fiscal Year before Current Fiscal Year 50,981   50,981   86,479
Two Years before Current Fiscal Year 138,228   138,228   56,471
Three Years before Current Fiscal Year 109,097   109,097   64,657
Four Years before Current Fiscal Year 71,018   71,018   41,996
More than Four Years before Current Fiscal Year 161,881   161,881   133,180
Revolving 2,646   2,646   2,009
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 622,241   622,241   427,260
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       6
Gross charge-offs, three years before 0       0
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 0       0
Gross charge-offs, revolving 0       0
Gross charge-offs (0) 6 (0) 6 6
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Owner Occupied Loans [Member] | Pass [Member]          
Current Fiscal Year 88,390   88,390   42,468
Fiscal Year before Current Fiscal Year 49,713   49,713   86,030
Two Years before Current Fiscal Year 137,780   137,780   55,069
Three Years before Current Fiscal Year 107,700   107,700   61,790
Four Years before Current Fiscal Year 67,322   67,322   39,654
More than Four Years before Current Fiscal Year 153,589   153,589   126,951
Revolving 2,646   2,646   1,240
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 607,140   607,140   413,202
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Owner Occupied Loans [Member] | Special Mention [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 1,268   1,268   449
Two Years before Current Fiscal Year 448   448   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 1,517   1,517   1,465
Revolving 0   0   769
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 3,233   3,233   2,683
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Owner Occupied Loans [Member] | Substandard [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   1,402
Three Years before Current Fiscal Year 1,397   1,397   2,867
Four Years before Current Fiscal Year 3,696   3,696   2,342
More than Four Years before Current Fiscal Year 6,775   6,775   4,764
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 11,868   11,868   11,375
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Owner Occupied Loans [Member] | Doubtful [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,335,092   1,335,092   1,505,605
Gross charge-offs 500 3,401 1,056 3,401  
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member]          
Current Fiscal Year 5,152   5,152   26,108
Fiscal Year before Current Fiscal Year 28,109   28,109   159,439
Two Years before Current Fiscal Year 32,577   32,577   18,056
Three Years before Current Fiscal Year 2,730   2,730   32,601
Four Years before Current Fiscal Year 1,201   1,201   650
More than Four Years before Current Fiscal Year 930   930   1,155
Revolving 9,151   9,151   8,229
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 79,850   79,850   246,238
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       0
Gross charge-offs, three years before 0       0
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 0       0
Gross charge-offs, revolving 0       0
Gross charge-offs (0) (0) (0) (0) 0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] | Pass [Member]          
Current Fiscal Year 5,152   5,152   26,108
Fiscal Year before Current Fiscal Year 28,109   28,109   148,261
Two Years before Current Fiscal Year 32,577   32,577   18,056
Three Years before Current Fiscal Year 2,730   2,730   9,738
Four Years before Current Fiscal Year 1,201   1,201   650
More than Four Years before Current Fiscal Year 930   930   995
Revolving 9,151   9,151   8,229
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 79,850   79,850   212,037
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] | Special Mention [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   178
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   178
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] | Substandard [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   11,178
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   22,685
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   160
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   34,023
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] | Doubtful [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member]          
Current Fiscal Year 7,299   7,299   6,338
Fiscal Year before Current Fiscal Year 6,278   6,278   31,987
Two Years before Current Fiscal Year 54,545   54,545   119,955
Three Years before Current Fiscal Year 97,640   97,640   115,403
Four Years before Current Fiscal Year 105,291   105,291   31,022
More than Four Years before Current Fiscal Year 90,822   90,822   78,800
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 361,875   361,875   383,505
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       0
Gross charge-offs, three years before 500       0
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 0       0
Gross charge-offs, revolving 0       0
Gross charge-offs 500 (0) 1,056 (0) 0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Pass [Member]          
Current Fiscal Year 7,299   7,299   6,338
Fiscal Year before Current Fiscal Year 6,278   6,278   26,236
Two Years before Current Fiscal Year 48,690   48,690   115,983
Three Years before Current Fiscal Year 97,640   97,640   115,403
Four Years before Current Fiscal Year 105,291   105,291   30,191
More than Four Years before Current Fiscal Year 77,617   77,617   60,813
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 342,815   342,815   354,964
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Special Mention [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   831
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   831
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Substandard [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   5,751
Two Years before Current Fiscal Year 5,855   5,855   3,972
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 13,205   13,205   17,987
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 19,060   19,060   27,710
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Doubtful [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member]          
Current Fiscal Year 63,652   63,652   102,426
Fiscal Year before Current Fiscal Year 103,969   103,969   196,932
Two Years before Current Fiscal Year 240,571   240,571   139,787
Three Years before Current Fiscal Year 105,824   105,824   176,589
Four Years before Current Fiscal Year 157,824   157,824   89,002
More than Four Years before Current Fiscal Year 220,754   220,754   170,111
Revolving 773   773   1,015
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 893,367   893,367   875,862
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       0
Gross charge-offs, three years before 0       632
Gross charge-offs, four years before 0       775
Gross charge-offs, more than five years before 0       1,994
Gross charge-offs, revolving 0       0
Gross charge-offs (0) 3,401 (0) 3,401 3,401
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] | Pass [Member]          
Current Fiscal Year 63,652   63,652   102,426
Fiscal Year before Current Fiscal Year 103,969   103,969   196,932
Two Years before Current Fiscal Year 240,271   240,271   134,443
Three Years before Current Fiscal Year 101,347   101,347   169,100
Four Years before Current Fiscal Year 157,824   157,824   86,273
More than Four Years before Current Fiscal Year 214,401   214,401   168,082
Revolving 773   773   1,015
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 882,237   882,237   858,271
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] | Special Mention [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 1,015   1,015   1,040
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,015   1,015   1,040
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] | Substandard [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 300   300   5,344
Three Years before Current Fiscal Year 4,477   4,477   7,489
Four Years before Current Fiscal Year 0   0   2,729
More than Four Years before Current Fiscal Year 5,338   5,338   989
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 10,115   10,115   16,551
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] | Doubtful [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   0
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 107,569   107,569   127,299
Gross charge-offs 50 384 50 384  
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member]          
Current Fiscal Year 5,955   5,955   8,434
Fiscal Year before Current Fiscal Year 3,134   3,134   8,285
Two Years before Current Fiscal Year 7,670   7,670   8,713
Three Years before Current Fiscal Year 6,442   6,442   19,261
Four Years before Current Fiscal Year 15,651   15,651   5,202
More than Four Years before Current Fiscal Year 15,350   15,350   12,440
Revolving 0   0   2,464
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 54,202   54,202   64,799
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       0
Gross charge-offs, three years before 0       0
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 0       0
Gross charge-offs, revolving 0       0
Gross charge-offs (0) (0) (0) (0) 0
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Pass [Member]          
Current Fiscal Year 209   209   8,201
Fiscal Year before Current Fiscal Year 2,905   2,905   8,285
Two Years before Current Fiscal Year 7,670   7,670   8,410
Three Years before Current Fiscal Year 6,442   6,442   12,363
Four Years before Current Fiscal Year 15,203   15,203   5,202
More than Four Years before Current Fiscal Year 15,146   15,146   12,221
Revolving 0   0   2,464
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 47,575   47,575   57,146
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Special Mention [Member]          
Current Fiscal Year 5,026   5,026   233
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   3,315
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 5,026   5,026   3,548
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Substandard [Member]          
Current Fiscal Year 720   720   0
Fiscal Year before Current Fiscal Year 229   229   0
Two Years before Current Fiscal Year 0   0   303
Three Years before Current Fiscal Year 0   0   3,583
Four Years before Current Fiscal Year 448   448   0
More than Four Years before Current Fiscal Year 204   204   219
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,601   1,601   4,105
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Doubtful [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   0
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member]          
Current Fiscal Year 5,995   5,995   4,778
Fiscal Year before Current Fiscal Year 2,789   2,789   6,288
Two Years before Current Fiscal Year 4,512   4,512   5,317
Three Years before Current Fiscal Year 4,101   4,101   4,391
Four Years before Current Fiscal Year 2,496   2,496   399
More than Four Years before Current Fiscal Year 585   585   1,062
Revolving 32,889   32,889   40,265
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 53,367   53,367   62,500
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       0
Gross charge-offs, three years before 50       384
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 0       0
Gross charge-offs, revolving 0       0
Gross charge-offs 50 384 50 384 384
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] | Pass [Member]          
Current Fiscal Year 5,995   5,995   4,778
Fiscal Year before Current Fiscal Year 2,313   2,313   6,219
Two Years before Current Fiscal Year 4,376   4,376   4,652
Three Years before Current Fiscal Year 3,453   3,453   3,154
Four Years before Current Fiscal Year 2,496   2,496   370
More than Four Years before Current Fiscal Year 585   585   720
Revolving 29,381   29,381   38,945
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 48,599   48,599   58,838
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] | Special Mention [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 447   447   48
Two Years before Current Fiscal Year 136   136   112
Three Years before Current Fiscal Year 648   648   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 2,826   2,826   213
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 4,057   4,057   373
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] | Substandard [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 29   29   21
Two Years before Current Fiscal Year 0   0   553
Three Years before Current Fiscal Year 0   0   1,237
Four Years before Current Fiscal Year 0   0   29
More than Four Years before Current Fiscal Year 0   0   342
Revolving 682   682   1,107
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 711   711   3,289
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] | Doubtful [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   0
Consumer Borrower [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss         1,251,025
Gross charge-offs 752 48 1,077 691  
Consumer Borrower [Member] | Residential Portfolio Segment [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,165,203   1,165,203   1,206,167
Gross charge-offs 719 10 931 614  
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member]          
Current Fiscal Year 21,757   21,757   53,688
Fiscal Year before Current Fiscal Year 51,267   51,267   37,893
Two Years before Current Fiscal Year 34,778   34,778   123,150
Three Years before Current Fiscal Year 106,512   106,512   210,228
Four Years before Current Fiscal Year 191,512   191,512   235,103
More than Four Years before Current Fiscal Year 423,110   423,110   214,675
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 828,936   828,936   874,737
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       0
Gross charge-offs, three years before 0       0
Gross charge-offs, four years before 0       7
Gross charge-offs, more than five years before 0       48
Gross charge-offs, revolving 0       0
Gross charge-offs (0) (0) (0) 54 55
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] | Performing Financial Instruments [Member]          
Current Fiscal Year 21,757   21,757   53,688
Fiscal Year before Current Fiscal Year 51,267   51,267   37,893
Two Years before Current Fiscal Year 34,377   34,377   122,651
Three Years before Current Fiscal Year 106,512   106,512   210,228
Four Years before Current Fiscal Year 191,512   191,512   234,461
More than Four Years before Current Fiscal Year 421,174   421,174   213,214
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 826,599   826,599   872,135
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] | Nonperforming Financial Instruments [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 401   401   499
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   642
More than Four Years before Current Fiscal Year 1,936   1,936   1,461
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,337   2,337   2,602
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]          
Current Fiscal Year 5,855   5,855   18,097
Fiscal Year before Current Fiscal Year 19,541   19,541   10,459
Two Years before Current Fiscal Year 5,806   5,806   0
Three Years before Current Fiscal Year 0   0   4,680
Four Years before Current Fiscal Year 0   0   467
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 31,202   31,202   33,703
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 0       0
Gross charge-offs, three years before 0       0
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 0       0
Gross charge-offs, revolving 0       0
Gross charge-offs (0) (0) (0) (0) 0
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] | Performing Financial Instruments [Member]          
Current Fiscal Year 5,855   5,855   18,097
Fiscal Year before Current Fiscal Year 19,541   19,541   10,459
Two Years before Current Fiscal Year 5,806   5,806   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   467
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 31,202   31,202   29,023
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] | Nonperforming Financial Instruments [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   4,680
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   0
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 0   0   4,680
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]          
Current Fiscal Year 323   323   757
Fiscal Year before Current Fiscal Year 723   723   2,121
Two Years before Current Fiscal Year 2,049   2,049   3,741
Three Years before Current Fiscal Year 3,998   3,998   5,302
Four Years before Current Fiscal Year 4,484   4,484   975
More than Four Years before Current Fiscal Year 7,543   7,543   5,702
Revolving 254,004   254,004   242,285
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 273,124   273,124   260,883
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       100
Gross charge-offs, two years before 0       10
Gross charge-offs, three years before 0       438
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 0       0
Gross charge-offs, revolving 0       0
Gross charge-offs (0) 10 (0) 260 548
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Performing Financial Instruments [Member]          
Current Fiscal Year 323   323   757
Fiscal Year before Current Fiscal Year 723   723   2,121
Two Years before Current Fiscal Year 2,049   2,049   3,716
Three Years before Current Fiscal Year 3,973   3,973   5,252
Four Years before Current Fiscal Year 4,248   4,248   975
More than Four Years before Current Fiscal Year 7,216   7,216   5,649
Revolving 254,004   254,004   242,285
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 272,536   272,536   260,755
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Nonperforming Financial Instruments [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   0
Two Years before Current Fiscal Year 0   0   25
Three Years before Current Fiscal Year 25   25   50
Four Years before Current Fiscal Year 236   236   0
More than Four Years before Current Fiscal Year 327   327   53
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 588   588   128
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member]          
Current Fiscal Year 2,358   2,358   4,753
Fiscal Year before Current Fiscal Year 4,176   4,176   6,770
Two Years before Current Fiscal Year 3,904   3,904   8,609
Three Years before Current Fiscal Year 6,928   6,928   7,090
Four Years before Current Fiscal Year 6,049   6,049   3,977
More than Four Years before Current Fiscal Year 8,202   8,202   5,595
Revolving 324   324   50
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 31,941   31,941   36,844
Gross charge-offs current year 0       0
Gross charge-offs, prior year 0       0
Gross charge-offs, two years before 565       0
Gross charge-offs, three years before 0       300
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 154       0
Gross charge-offs, revolving 0       0
Gross charge-offs 719 (0) 931 300 300
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] | Performing Financial Instruments [Member]          
Current Fiscal Year 2,358   2,358   4,753
Fiscal Year before Current Fiscal Year 4,176   4,176   4,995
Two Years before Current Fiscal Year 3,904   3,904   8,609
Three Years before Current Fiscal Year 6,928   6,928   7,090
Four Years before Current Fiscal Year 6,049   6,049   3,977
More than Four Years before Current Fiscal Year 8,130   8,130   4,995
Revolving 324   324   50
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 31,869   31,869   34,469
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] | Nonperforming Financial Instruments [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   1,775
Two Years before Current Fiscal Year 0   0   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 72   72   600
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 72   72   2,375
Consumer Borrower [Member] | Consumer Portfolio Segment [Member]          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,209,383   1,209,383   1,251,025
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member]          
Current Fiscal Year 1,530   1,530   5,330
Fiscal Year before Current Fiscal Year 4,848   4,848   2,637
Two Years before Current Fiscal Year 2,000   2,000   3,016
Three Years before Current Fiscal Year 1,884   1,884   3,056
Four Years before Current Fiscal Year 2,384   2,384   157
More than Four Years before Current Fiscal Year 2,851   2,851   3,680
Revolving 28,683   28,683   26,982
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 44,180   44,180   44,858
Gross charge-offs current year 0       0
Gross charge-offs, prior year 5       16
Gross charge-offs, two years before 0       31
Gross charge-offs, three years before 4       22
Gross charge-offs, four years before 0       0
Gross charge-offs, more than five years before 24       69
Gross charge-offs, revolving 0       0
Gross charge-offs 33 $ 38 146 $ 77 138
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] | Performing Financial Instruments [Member]          
Current Fiscal Year 1,530   1,530   5,330
Fiscal Year before Current Fiscal Year 4,848   4,848   2,318
Two Years before Current Fiscal Year 1,726   1,726   3,016
Three Years before Current Fiscal Year 1,884   1,884   3,056
Four Years before Current Fiscal Year 2,384   2,384   157
More than Four Years before Current Fiscal Year 2,851   2,851   3,651
Revolving 28,683   28,683   26,982
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 43,906   43,906   44,510
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] | Nonperforming Financial Instruments [Member]          
Current Fiscal Year 0   0   0
Fiscal Year before Current Fiscal Year 0   0   319
Two Years before Current Fiscal Year 274   274   0
Three Years before Current Fiscal Year 0   0   0
Four Years before Current Fiscal Year 0   0   0
More than Four Years before Current Fiscal Year 0   0   29
Revolving 0   0   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss $ 274   $ 274   $ 348