Employee Benefit Plan, Summary of Accounting Policy (Policies)	3 Months Ended
	Dec. 31, 2025
EBP Third Federal 401(k) Savings Plan
EBP, Accounting Standard Update and Change in Accounting Principle [Line Items]
New Accounting Pronouncements	Recent Accounting PronouncementsThere are no recently issued accounting pronouncements that apply to the financial statements or activities of the Plan.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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