Regulatory Capital Requirements - Schedule of Actual Capital Amounts and Ratios (Details) $ in Thousands	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)
Total Capital (to Risk- Weighted Assets), Actual Amount	$ 70,446	$ 68,071
Tier 1 Capital (to Risk- Weighted Assets), Actual Amount	65,475	63,329
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Amount	65,475	63,329
Tier 1 Capital (to Average Assets), Actual Amount	$ 65,475	$ 63,329
Total Capital (to Risk- Weighted Assets), Actual Ratio	0.177	0.1801
Tier 1 Capital (to Risk- Weighted Assets), Actual Ratio	0.1651	0.1675
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Ratio	0.1651	0.1675
Tier 1 Capital (to Average Assets), Actual Ratio	0.1387	0.1398
Total Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Amount	$ 31,732	$ 30,244
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Amount	23,799	22,683
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required for Capital Adequacy Purposes, Amount	17,849	17,012
Tier 1 Capital (to Average Assets), Minimum Required for Capital Adequacy Purposes, Amount	$ 18,880	$ 18,125
Total Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Ratio	0.08	0.08
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Ratio	0.06	0.06
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required for Capital Adequacy Purposes, Ratio	0.045	0.045
Tier 1 Capital (to Average Assets), Minimum Required for Capital Adequacy Purposes, Ratio	0.04	0.04
Total Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	$ 39,665	$ 37,805
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	31,732	30,244
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	25,782	24,573
Tier 1 Capital (to Average Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	$ 23,600	$ 22,656
Total Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.10	0.10
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.08	0.08
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.065	0.065
Tier 1 Capital (to Average Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.05	0.05

Central Plains Bancshares, Inc. 10-Q