Condensed Parent Company Only Financial Information - CONDENSED STATEMENT OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash Flows from Operating Activities
Net Loss	$ (1,078)	$ 797
Adjustments to Reconcile Net Loss to Net
Increase in Other Assets	(95)	(744)
Increase in Other Liabilities	141	399
Net Cash Provided by (Used in) Operating Activities	(1,054)	796
Cash Flows from Investing Activities
Net Cash Used in Investing Activities	(27,484)	(6,639)
Cash Flows from Financing Activities
Net proceeds from Issuance of Common Stock	48,747
Net Cash Used in Financing Activities	47,148	5,114
Net Increase in Cash and Cash Equivalents	18,610	(729)
Cash and Cash Equivalents, Beginning of Year	19,306	20,035
Cash and Cash Equivalents, End of Year	37,916	$ 19,306
Fifth District Bancorp, Inc | Fifth District Bancorp, Inc
Cash Flows from Operating Activities
Net Loss	(1,078)
Adjustments to Reconcile Net Loss to Net
Equity in Undistributed Losses of Subsidiary	91
Increase in Other Assets	(263)
Increase in Other Liabilities	202
Net Cash Provided by (Used in) Operating Activities	(1,048)
Cash Flows from Investing Activities
Investment In Subsidiary	(25,851)
Net Cash Used in Investing Activities	(25,851)
Cash Flows from Financing Activities
Net proceeds from Issuance of Common Stock	48,747
Net Cash Used in Financing Activities	48,747
Net Increase in Cash and Cash Equivalents	21,848
Cash and Cash Equivalents, End of Year	$ 21,848