v3.26.3
Loans and Allowance for Credit Losses - Summary of Credit Risk Profile of Loans Portfolio Based on Risk Category and Year of Origination (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 31, 2026
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year $ 37,392   $ 37,392   $ 99,776
Fiscal Year before Current Fiscal Year 82,421   82,421   65,841
Two Years before Current Fiscal Year 53,392   53,392   36,980
Three Years before Current Fiscal Year 33,618   33,618   57,943
Four Years before Current Fiscal Year 52,802   52,802   75,470
Prior 144,733   144,733   79,017
Revolving Loans 42,155   42,155   33,379
Total loans 446,513   446,513   448,406
Total 1 $ 7 5 $ 7  
Real Estate | Real Estate - Construction          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 4,282   4,282   13,177
Fiscal Year before Current Fiscal Year 7,675   7,675   11,698
Two Years before Current Fiscal Year 2,954   2,954   2,242
Revolving Loans 1,448   1,448   1,516
Total loans 16,359   16,359   28,633
Real Estate | Real Estate - Construction | Pass          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 4,282   4,282   13,177
Fiscal Year before Current Fiscal Year 7,675   7,675   11,698
Two Years before Current Fiscal Year 2,954   2,954   2,242
Revolving Loans 1,448   1,448   1,516
Total loans 16,359   16,359   28,633
Real Estate | Real Estate - Commercial          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 3,863   3,863   18,117
Fiscal Year before Current Fiscal Year 19,675   19,675   17,226
Two Years before Current Fiscal Year 24,595   24,595   13,408
Three Years before Current Fiscal Year 14,688   14,688   25,608
Four Years before Current Fiscal Year 24,778   24,778   24,682
Prior 52,978   52,978   30,164
Revolving Loans 27   27   30
Total loans 140,604   140,604   129,235
Real Estate | Real Estate - Commercial | Pass          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 3,863   3,863   18,117
Fiscal Year before Current Fiscal Year 19,675   19,675   17,226
Two Years before Current Fiscal Year 24,595   24,595   13,026
Three Years before Current Fiscal Year 14,688   14,688   25,608
Four Years before Current Fiscal Year 24,778   24,778   24,682
Prior 51,097   51,097   28,077
Revolving Loans 27   27   30
Total loans 138,723   138,723   126,766
Real Estate | Real Estate - Commercial | Substandard          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Two Years before Current Fiscal Year         382
Prior 1,881   1,881   2,087
Total loans 1,881   1,881   2,469
Real Estate | Real Estate - Residential          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 7,818   7,818   22,592
Fiscal Year before Current Fiscal Year 17,671   17,671   15,237
Two Years before Current Fiscal Year 12,620   12,620   12,185
Three Years before Current Fiscal Year 10,883   10,883   19,719
Four Years before Current Fiscal Year 17,460   17,460   42,456
Prior 76,948   76,948   39,555
Revolving Loans 10,750   10,750   10,297
Total loans 154,150   154,150   162,041
Current Fiscal Year, Gross Write off         1
Total         1
Real Estate | Real Estate - Residential | Pass          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 7,818   7,818   22,592
Fiscal Year before Current Fiscal Year 17,671   17,671   15,237
Two Years before Current Fiscal Year 12,430   12,430   12,185
Three Years before Current Fiscal Year 10,855   10,855   19,644
Four Years before Current Fiscal Year 17,362   17,362   42,437
Prior 76,682   76,682   39,282
Revolving Loans 10,750   10,750   10,297
Total loans 153,568   153,568   161,674
Real Estate | Real Estate - Residential | Substandard          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Two Years before Current Fiscal Year 190   190    
Three Years before Current Fiscal Year 28   28   75
Four Years before Current Fiscal Year 98   98   19
Prior 266   266   273
Total loans 582   582   367
Commercial Non Real Estate Portfolio Segment | Commercial - Non Real Estate          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 1,045   1,045   24,493
Fiscal Year before Current Fiscal Year 20,713   20,713   5,590
Two Years before Current Fiscal Year 3,082   3,082   3,492
Three Years before Current Fiscal Year 3,098   3,098   1,578
Four Years before Current Fiscal Year 1,117   1,117   1,404
Prior 5,288   5,288   5,340
Revolving Loans 6,734   6,734   6,481
Total loans 41,077   41,077   48,378
Commercial Non Real Estate Portfolio Segment | Commercial - Non Real Estate | Pass          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 1,045   1,045   24,366
Fiscal Year before Current Fiscal Year 20,586   20,586   5,590
Two Years before Current Fiscal Year 3,082   3,082   3,492
Three Years before Current Fiscal Year 3,098   3,098   1,469
Four Years before Current Fiscal Year 1,015   1,015   1,404
Prior 5,102   5,102   5,124
Revolving Loans 6,404   6,404   6,151
Total loans 40,332   40,332   47,596
Commercial Non Real Estate Portfolio Segment | Commercial - Non Real Estate | Substandard          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year         127
Fiscal Year before Current Fiscal Year 127   127    
Three Years before Current Fiscal Year         109
Four Years before Current Fiscal Year 102   102    
Prior 186   186   216
Revolving Loans 330   330   330
Total loans 745   745   782
Agricultural Portfolio Segment | Agricultural          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 19,013   19,013   17,576
Fiscal Year before Current Fiscal Year 14,138   14,138   13,705
Two Years before Current Fiscal Year 8,195   8,195   1,286
Three Years before Current Fiscal Year 1,260   1,260   2,692
Four Years before Current Fiscal Year 2,627   2,627   1,747
Prior 4,260   4,260   2,594
Revolving Loans 23,196   23,196   15,055
Total loans 72,689   72,689   54,655
Agricultural Portfolio Segment | Agricultural | Pass          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 19,013   19,013   16,708
Fiscal Year before Current Fiscal Year 13,546   13,546   13,705
Two Years before Current Fiscal Year 8,195   8,195   1,286
Three Years before Current Fiscal Year 1,260   1,260   2,692
Four Years before Current Fiscal Year 2,627   2,627   1,747
Prior 4,260   4,260   2,594
Revolving Loans 22,737   22,737   13,245
Total loans 71,638   71,638   51,977
Agricultural Portfolio Segment | Agricultural | Substandard          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year         868
Fiscal Year before Current Fiscal Year 592   592    
Revolving Loans 459   459   1,810
Total loans 1,051   1,051   2,678
Consumer Portfolio Segment | Other Consumer          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 1,221   1,221   1,840
Fiscal Year before Current Fiscal Year 1,054   1,054   1,459
Two Years before Current Fiscal Year 996   996   3,230
Three Years before Current Fiscal Year 2,553   2,553   3,038
Four Years before Current Fiscal Year 2,284   2,284   113
Prior 205   205   478
Total loans 8,313   8,313   10,158
Current Fiscal Year, Gross Write off     5   17
Total     5   17
Consumer Portfolio Segment | Other Consumer | Pass          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 1,221   1,221   1,826
Fiscal Year before Current Fiscal Year 1,042   1,042   1,416
Two Years before Current Fiscal Year 877   877   3,188
Three Years before Current Fiscal Year 2,553   2,553   3,031
Four Years before Current Fiscal Year 2,278   2,278   109
Prior 203   203   478
Total loans 8,174   8,174   10,048
Consumer Portfolio Segment | Other Consumer | Substandard          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year         14
Fiscal Year before Current Fiscal Year 12   12   43
Two Years before Current Fiscal Year 119   119   42
Three Years before Current Fiscal Year         7
Four Years before Current Fiscal Year 6   6   4
Prior 2   2    
Total loans 139   139   110
Land Development And SIDs Portfolio Segment | Land Development and SIDs          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 150   150   1,981
Fiscal Year before Current Fiscal Year 1,495   1,495   926
Two Years before Current Fiscal Year 950   950   1,137
Three Years before Current Fiscal Year 1,136   1,136   5,308
Four Years before Current Fiscal Year 4,536   4,536   5,068
Prior 5,054   5,054   886
Total loans 13,321   13,321   15,306
Land Development And SIDs Portfolio Segment | Land Development and SIDs | Pass          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Current fiscal year 150   150   1,981
Fiscal Year before Current Fiscal Year 1,495   1,495   926
Two Years before Current Fiscal Year 950   950   1,137
Three Years before Current Fiscal Year 1,136   1,136   5,308
Four Years before Current Fiscal Year 4,536   4,536   5,068
Prior 5,054   5,054   886
Total loans $ 13,321   $ 13,321   $ 15,306