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Income Taxes (Tax Expense and Effective Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Taxes
Earnings before income taxes	$ 37,708	$ 50,855	$ 131,922	$ 128,817
Income tax expense	$ 9,406	$ 14,799	$ 36,452	$ 38,272
Effective tax rate	24.90%	29.10%	27.60%	29.70%

- Definition

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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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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