Concentration Of Risk (Customer Percentages Of Company Net Revenues) (Details) (Customer Concentration Risk [Member], Sales Revenue, Services, Net [Member])	Sep. 30, 2012		Sep. 30, 2011
Customer 1 [Member]
Concentration Risk [Line Items]
Concentration of risk percentage		[1]	11.00%
Customer 2 [Member]
Concentration Risk [Line Items]
Concentration of risk percentage	12.00%		13.00%

[1] Less than 10%