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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Mar. 31, 2016	Sep. 30, 2015
Income Taxes
Income tax expense reduction due to research and experimentation tax credit	$ 5,197
Estimated decrease in liability for unrecognized tax benefits		$ 3,385
Unrecognized tax benefits that, if recognized, would affect the effective tax rate		9,780	$ 10,494
Accrued interest and penalties		896	859
Unrecognized Tax Benefits		$ 20,827	$ 21,469

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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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 unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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

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