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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 + Details
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