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Contractual Obligations (Narrative) (Details) (USD $)
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Contractual Obligations [Abstract]    
Operating Lease, Term 10 years  
Operating Lease, Extension Option, Term 5 years  
Operating Lease, Periodic Payment, Base Rent $ 3,600,000  
Operating Lease, Periodic Payment, Increase 3.00%  
Acquisition related contingent consideration (current) $ 22,692,000 $ 0