Income Taxes (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
Jun. 30, 2011	Jun. 30, 2011	Sep. 30, 2010
Income Tax Expense Benefit Details [Abstract]
Unrecognized Tax Benefits	$ 27.0	$ 27.0
Unrecognized Tax Benefits Interest On Income Taxes Expense	$ 166,000	$ 567,000	$ 210,000

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph c

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 15

Name:	us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration