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Income Taxes (Deferred Tax Valuation Allowance) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Deferred Tax Valuation Allowance [Roll Forward]
Balance at the beginning of the year	$ 860	$ 390	$ 300
Additions (subtractions) to valuation allowance	1,740	470	90
Balance at the end of the year	$ 2,600	$ 860	$ 390

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.