Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Jun. 30, 2012	Jun. 30, 2012
Income Taxes
Effective income tax rate (as a percent)	28.20%	31.20%
Accrued interest	$ 1,550	$ 1,550
Accrued penalties	635	635
Liability of unrecognized tax benefits	11,112	11,112
Unrecognized tax benefits, recognition of which would have an effect on income tax expense and effective income tax rate	$ 8,620	$ 8,620

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

This element represents the amount of interest expense accrued as of the date of the statement of financial position 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.

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