v3.25.4

Deposits (Tables) | 3 Months Ended
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Dec. 31, 2025
Deposits [Abstract] |
Summary Of Deposit Account Balances | Deposit account balances are summarized as follows:
|  | December 31, 2025 |  | September 30, 2025
Checking accounts |  | $ | 813,293 |  |  | $ | 785,785 |
Savings accounts, excluding money market accounts |  | 1,443,435 |  |  | 1,043,715 |
Money market accounts |  | 118,264 |  |  | 128,245 |
Certificates of deposit |  | 7,980,335 |  |  | 8,474,503 |
|  | 10,355,327 |  |  | 10,432,248 |
Accrued interest |  | 16,748 |  |  | 14,720 |
Total deposits |  | $ | 10,372,075 |  |  | $ | 10,446,968 |

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- Definition Tabular disclosure of type of deposit liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph e -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph d -Publisher SEC Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph c -Publisher SEC Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph a -Subparagraph (5) -Publisher SEC Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph a -Subparagraph (4) -Publisher SEC Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph a -Subparagraph (3) -Publisher SEC Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph a -Subparagraph (2) -Publisher SEC Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph a -Subparagraph (1) -Publisher SEC Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph a -Publisher SEC Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph f -Subparagraph (1) -Publisher SEC Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph f -Subparagraph (2) -Publisher SEC Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph f -Subparagraph (2)(i) -Publisher SEC Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph f -Subparagraph (2)(iv) -Publisher SEC Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph f -Subparagraph (2)(iii) -Publisher SEC Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph f -Subparagraph (2)(ii) -Publisher SEC + Details
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