v3.26.1
Loans Receivable And Allowance For Credit Losses (Allowance For Credit Losses) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]        
Beginning Balance $ 24,572 $ 24,997 $ 24,039 $ 23,035
Charge-offs 41 123 164 140
Recoveries 4 9 8 33
Provision for credit losses 2,064 (913) 2,716 1,042
Ending Balance 26,599 23,970 26,599 23,970
One- to Four-Family Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Beginning Balance 2,842 3,757 3,046 3,673
Charge-offs 12 113 12 113
Recoveries 1 2 1 5
Provision for credit losses (168) (84) (372) (3)
Ending Balance 2,663 3,562 2,663 3,562
Commercial Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Beginning Balance 21,522 20,999 20,776 19,154
Charge-offs 0 0 102 0
Recoveries 0 2 2 22
Provision for credit losses 2,213 (825) 3,059 1,000
Ending Balance 23,735 20,176 23,735 20,176
Commercial Segment [Member] | Commercial Real Estate [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Beginning Balance 19,696 19,790 18,277 17,968
Charge-offs 0 0 0 0
Recoveries 0 0 0 20
Provision for credit losses 1,993 (785) 3,412 1,017
Ending Balance 21,689 19,005 21,689 19,005
Commercial Segment [Member] | Commercial and Industrial [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Beginning Balance 1,826 1,209 2,499 1,186
Charge-offs 0 0 102 0
Recoveries 0 2 2 2
Provision for credit losses 220 (40) (353) (17)
Ending Balance 2,046 1,171 2,046 1,171
Consumer Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Beginning Balance 208 241 217 208
Charge-offs 29 10 50 27
Recoveries 3 5 5 6
Provision for credit losses 19 (4) 29 45
Ending Balance $ 201 $ 232 $ 201 $ 232