Derivative Instruments and Hedging Activities - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Derivatives Designated as Hedging Instruments
Total derivatives designated as hedging instruments, Asset	$ 2,216	$ 8,367
Credit-risk-related Contingent Features
Total derivatives designated as hedging instruments, Liability	333
Other Assets
Derivatives Designated as Hedging Instruments
Interest rate caps	1,636	$ 8,367
Other current assets
Derivatives Designated as Hedging Instruments
Foreign exchange contracts	580
Accrued Liabilities
Credit-risk-related Contingent Features
Foreign exchange contracts	$ 333

Derivative instruments that are designated as hedging instruments.

No definition available.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
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-Publisher FASB
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- References

No definition available.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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- Definition

Fair value as of the balance sheet date of all derivative assets designated as foreign currency fair value hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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- Definition

Fair value as of the balance sheet date of all derivative liabilities designated as foreign currency fair value hedging instruments.

+ References

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- Definition

Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments.

+ References

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