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Commitments (Rent Expense) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Leases, Operating [Abstract]      
Rentals $ 3,093 $ 3,275 $ 3,447
Less: sublease rentals (41) (17) 0
Total rental expense $ 3,052 $ 3,258 $ 3,447