Fair Value of Financial Instruments (Details) (Recurring, USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Level 2 \| Interest rate swaps
Fair value measurements
Derivative liabilities (included in accrued expenses and other current liabilities)		$ 1,151
Level 3 \| Cross currency swaps
Fair value measurements
Derivative liabilities (included in accrued expenses and other current liabilities)	3,156	3,857
Derivative liabilites (included in other liabilities)	$ 3,726	$ 14,773

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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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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, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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