Derivative Instruments and Hedging Activities - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Derivatives not designated as hedging instruments:
Asset Derivatives	$ 7,917	$ 5,957
Credit-risk-related Contingent Features
Liability Derivatives		207
Other Assets
Derivatives designated as hedging instruments:
Interest rate caps	7,734	5,178
Other current assets
Derivatives not designated as hedging instruments:
Foreign exchange contracts	$ 183	779
Accrued Liabilities
Credit-risk-related Contingent Features
Foreign exchange contracts		$ 207

Derivative instruments that are designated as hedging instruments.

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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

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- References

No definition available.

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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

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

+ References

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as 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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