v3.25.1
Loans Receivable And Allowance For Credit Losses (Gross Charge-offs) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]        
Year One     $ 8 $ 2
Year Two     13 9
Year Three     4 0
Year Four     0 0
Year Five     0 0
Prior Years     113 14
Revolving Line of Credit     2 0
Revolving Line of Credit Converted to Term Loan     0 0
Total Charge-offs $ 123 $ 18 140 25
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 113 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 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 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 0 113 0
Commercial 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     0 10
Revolving Line of Credit     0 0
Revolving Line of Credit Converted to Term Loan     0 0
Total Charge-offs 0 10 0 10
Commercial Segment [Member] | Commercial Real Estate [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 10
Revolving Line of Credit     0 0
Revolving Line of Credit Converted to Term Loan     0 0
Total Charge-offs     0 10
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
Consumer Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Year One     8 2
Year Two     13 9
Year Three     4 0
Year Four     0 0
Year Five     0 0
Prior Years     0 4
Revolving Line of Credit     2 0
Revolving Line of Credit Converted to Term Loan     0 0
Total Charge-offs $ 10 $ 8 27 15
Consumer Segment [Member] | Home Equity [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Year One     8 2
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     20 3
Consumer Segment [Member] | Other [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Year One     0 0
Year Two     1 8
Year Three     4 0
Year Four     0 0
Year Five     0 0
Prior Years     0 4
Revolving Line of Credit     2 0
Revolving Line of Credit Converted to Term Loan     0 0
Total Charge-offs     $ 7 $ 12