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LOANS AND LEASES, NET - Troubled Debt Restructured Loans (Details) - National Lending - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022
Commercial finance |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
TDRs recorded investment | $ 0 | $ 200,000 | $ 0 | $ 10,300,000
TDRs subsequent default, recorded investment |  | 300,000 | $ 100,000 | 2,600,000
Consumer finance |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
TDRs recorded investment | $ 0 | 200,000 |  | 200,000
TDRs subsequent default, recorded investment |  | $ 300,000 |  | $ 800,000

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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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