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Income Taxes, Effective Tax Rate (Details)	12 Months Ended
Income Taxes, Effective Tax Rate (Details)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Taxes computed at statutory rate	35.00%	35.00%	35.00%
State income taxes	3.60%	3.70%	3.50%
Foreign taxes	(1.10%)	(0.90%)	(1.10%)
Other Adjustments	0.30%	0.20%	1.00%
Effective Income Tax Rate, Continuing Operations	37.80%	38.00%	38.40%

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 domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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