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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Tables)
12 Months Ended
Sep. 30, 2012
Accounting Policies [Abstract]  
Property, Plant and Equipment
The estimated useful lives by asset classification are as follows:
Building
13 years
Computer hardware
3 years
Computer software
3 to 5 years
Furniture and equipment
3 years
Leasehold improvements
Shorter of the estimated useful life or life of related lease