Income Taxes (Summary of Valuation Allowance) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Mar. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 6.3

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32123-109318

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration