Loans and Allowance for Credit Losses - Schedule of Aging Analysis of Contractually Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Mar. 31, 2026
Financing Receivable, Past Due [Line Items]
Total	$ 446,513	$ 448,406
Loans Past Due 90 Days or More Still Accuring	532	234
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	344	2,339
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	229	178
Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	804	234
Total Past Due
Financing Receivable, Past Due [Line Items]
Total	1,377	2,751
Current
Financing Receivable, Past Due [Line Items]
Total	445,136	445,655
Commercial Real Estate Portfolio Segment \| Real Estate - Construction
Financing Receivable, Past Due [Line Items]
Total	16,359	28,633
Commercial Real Estate Portfolio Segment \| Real Estate - Construction \| Current
Financing Receivable, Past Due [Line Items]
Total	16,359	28,633
Commercial Real Estate Portfolio Segment \| Real Estate - Commercial
Financing Receivable, Past Due [Line Items]
Total	140,604	129,235
Commercial Real Estate Portfolio Segment \| Real Estate - Commercial \| Current
Financing Receivable, Past Due [Line Items]
Total	140,604	129,235
Commercial Real Estate Portfolio Segment \| Real Estate - Residential
Financing Receivable, Past Due [Line Items]
Total	154,150	162,041
Loans Past Due 90 Days or More Still Accuring	387	96
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	76	623
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	66	26
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	387	96
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total	529	745
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| Current
Financing Receivable, Past Due [Line Items]
Total	153,621	161,296
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate
Financing Receivable, Past Due [Line Items]
Total	41,077	48,378
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	200	235
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	29	0
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	230
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total	459	235
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| Current
Financing Receivable, Past Due [Line Items]
Total	40,618	48,143
Agricultural Portfolio Segment \| Agricultural
Financing Receivable, Past Due [Line Items]
Total	72,689	54,655
Agricultural Portfolio Segment \| Agricultural \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total		1,356
Agricultural Portfolio Segment \| Agricultural \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total		1,356
Agricultural Portfolio Segment \| Agricultural \| Current
Financing Receivable, Past Due [Line Items]
Total	72,689	53,299
Consumer Portfolio Segment \| Other Consumer
Financing Receivable, Past Due [Line Items]
Total	8,313	10,158
Loans Past Due 90 Days or More Still Accuring	145	138
Consumer Portfolio Segment \| Other Consumer \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	68	125
Consumer Portfolio Segment \| Other Consumer \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	134	152
Consumer Portfolio Segment \| Other Consumer \| Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	187	138
Consumer Portfolio Segment \| Other Consumer \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total	389	415
Consumer Portfolio Segment \| Other Consumer \| Current
Financing Receivable, Past Due [Line Items]
Total	7,924	9,743
Land Development And SIDs Portfolio Segment \| Land Development and SIDs
Financing Receivable, Past Due [Line Items]
Total	13,321	15,306
Land Development And SIDs Portfolio Segment \| Land Development and SIDs \| Current
Financing Receivable, Past Due [Line Items]
Total	$ 13,321	$ 15,306