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LEASES - Recognized Right-of-Use Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Oct. 01, 2019 | Sep. 30, 2019
--- | --- | --- | ---
Lessee, Lease, Description [Line Items] |  |  |
Right-of-use assets | $ 47,534 | $ 56,071 | $ 0
Properties |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Right-of-use assets | 44,413 | 52,188 |
Equipment |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Right-of-use assets | 2,606 | 3,652 |
Other |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Right-of-use assets | $ 515 | $ 231 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |