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FAIR VALUES OF FINANCIAL INSTRUMENTS - Quantitative Information (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loans, Net	$ 4,223,010	$ 3,525,803
Impaired Loans | Valuation, Market Approach
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loans, Net	$ 21,829	1,575
Impaired Loans | Valuation, Market Approach | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of estimated selling cost	3.00%
Impaired Loans | Valuation, Market Approach | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of estimated selling cost	25.00%
Foreclosed Assets | Valuation, Market Approach
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loans, Net	$ 0	$ 1
Foreclosed Assets | Valuation, Market Approach | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of estimated selling cost	9.00%
Foreclosed Assets | Valuation, Market Approach | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of estimated selling cost	20.00%

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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://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Publisher FASB
-URI https://asc.fasb.org//310-10/tableOfContent

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