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LOANS AND LEASES RECEIVABLE, NET - Troubled Debt Restructured Loans (Details) $ in Millions | 12 Months Ended
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Sep. 30, 2018 USD ($) loan | Sep. 30, 2017 USD ($) loan
Community Banking [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of loans modified in TDR | loan | 10 | 4
Troubled debt restructuring (TDR's) | $ | $ 2.0 | $ 0.5
Number of loans modified in TDR, subsequent default | loan | 1 | 0
Loans modified in TDR, subsequent default | $ | $ 0.1 |
National Lending [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of loans modified in TDR | loan | 11 |
Troubled debt restructuring (TDR's) | $ | $ 2.5 |

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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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