Condensed Parent only Financial Information - Schedule of Condensed Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Expense:
Non-interest expense	$ 12,602	$ 10,840
Income tax benefit	877	317
Net income	3,759	$ 1,646
Central Plains Banchsares, Inc.
Income:
Interest income	121
Total income	121
Expense:
Non-interest expense	207
Total expense	207
Losses before income tax benefit and equity in undistributed earnings of subsidiary	(86)
Income tax benefit	(43)
Losses before equity in undistributed earnings of subsidiary	(43)
Equity in undistributed earnings of subsidiary	3,802
Net income	$ 3,759