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FAIR VALUE DISCLOSURES - Schedule of the Carrying Amount, Fair Value, and Placement in the Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Sep. 30, 2024
Carrying Value [Member]
Financial instruments - assets
Investment securities held to maturity	$ 74,638	$ 79,816
Loan receivable net allowance for credit losses	801,057	772,614
Financial instruments - liabilities
Certificates of deposit including retirement certificates	165,714	159,652
Borrowings	33,924	28,568
Fair Value [Member]
Financial instruments - assets
Investment securities held to maturity	67,121	72,617
Loan receivable net allowance for credit losses	799,699	766,822
Financial instruments - liabilities
Certificates of deposit including retirement certificates	165,086	159,582
Borrowings	33,381	28,151
Level 1 [Member]
Financial instruments - assets
Investment securities held to maturity
Loan receivable net allowance for credit losses
Financial instruments - liabilities
Certificates of deposit including retirement certificates
Borrowings
Level 2 [Member]
Financial instruments - assets
Investment securities held to maturity	67,121	72,617
Loan receivable net allowance for credit losses
Financial instruments - liabilities
Certificates of deposit including retirement certificates	165,086	159,582
Borrowings	33,381	28,151
Level 3 [Member]
Financial instruments - assets
Investment securities held to maturity
Loan receivable net allowance for credit losses	799,699	766,822
Financial instruments - liabilities
Certificates of deposit including retirement certificates
Borrowings

X

- Definition

Certificates of deposit including retirement certificates.

+ References

No definition available.

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- Definition

The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

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- Definition

Amount of debt and lease obligation, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(21))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-SubTopic 10
-Topic 825
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
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-Section 50
-Paragraph 11
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-12

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