DERIVATIVE INSTRUMENTS - CREDIT RISK EXPOSURE (Details) - USD ($)	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Credit Risk Exposure [Line Items]
Gross Credit Exposure	$ 217,199,000
Derivative, net liability position, aggregate fair value	186,000	$ 124,000
Additional collateral, aggregate fair value	0	$ 33,000
Investment grade
Credit Risk Exposure [Line Items]
Gross Credit Exposure	141,930,000
Noninvestment grade
Credit Risk Exposure [Line Items]
Gross Credit Exposure	17,997,000
Internally-rated investment grade
Credit Risk Exposure [Line Items]
Gross Credit Exposure	27,948,000
Internally-rated noninvestment grade
Credit Risk Exposure [Line Items]
Gross Credit Exposure	$ 29,324,000

The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4H
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959

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- Definition

Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

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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.

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The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4H
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959

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