Income Taxes (Details 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Income Taxes
Valuation allowance against the NYS investment tax credits	$ 3,486	$ 2,790
Valuation allowance against foreign loss carryforwards	11,381	12,614
Foreign
Income Taxes
Net operating losses	32,469	35,878
Tax credit carryforwards	84,810	50,316
New York State (NYS) \| Investment tax credit
Income Taxes
Tax credit carryforwards	$ 3,486	$ 3,393

The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References+ Details

- Definition

The portion of the deferred tax asset arising from a tax credit carryforward for which it is more likely than not that a tax benefit will not be realized.

+ References+ Details