Loans Receivable And Allowance For Credit Losses (Gross Charge-offs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			$ 35	$ 64
Year Two			13	10
Year Three			4	13
Year Four			0	0
Year Five			0	0
Prior Years			115	14
Revolving Line of Credit			2	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs	$ 29	$ 76	169	101
One- to Four-Family Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	0
Year Two			0	0
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			113	0
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs	0	0	113	0
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	0
Year Two			0	0
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			0	0
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs			0	0
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	0
Year Two			0	0
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			0	0
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs			0	0
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	0
Year Two			0	0
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			113	0
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs			113	0
Commercial Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	50
Year Two			0	0
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			0	10
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs			0	60
Commercial Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	50
Year Two			0	0
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			0	10
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs	0	50	0	60
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	0
Year Two			0	0
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			0	0
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs	0	0	0	0
Consumer Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			35	14
Year Two			13	10
Year Three			4	13
Year Four			0	0
Year Five			0	0
Prior Years			2	4
Revolving Line of Credit			2	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs	$ 29	$ 26	56	41
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			35	14
Year Two			12	1
Year Three			0	0
Year Four			0	0
Year Five			0	0
Prior Years			0	0
Revolving Line of Credit			0	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs			47	15
Consumer Segment [Member] | Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year One			0	0
Year Two			1	9
Year Three			4	13
Year Four			0	0
Year Five			0	0
Prior Years			2	4
Revolving Line of Credit			2	0
Revolving Line of Credit Converted to Term Loan			0	0
Total Charge-offs			$ 9	$ 26