Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2012
Income Taxes
Tax benefit related to reduction in the amount of undistributed earnings expected to be repatriated to the US in the foreseeable future		$ 3,326
Income tax expense reduction due to research and experimentation tax credit	6,558
Estimated decrease in liability for unrecognized tax benefits	953
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 16,448		$ 15,061

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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