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Goodwill and Other Intangible Assets (Details 4) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 30, 2011
Estimate of the amount and classification of amortization expense for definite-lived intangible assets  
Amortization Expense, 2012 $ 2,321
Amortization Expense, 2013 6,063
Amortization Expense, 2014 5,825
Amortization Expense, 2015 5,558
Amortization Expense, 2016 5,500
Operations Expense, 2012 138
Operations Expense, 2013 136
Operations Expense, 2014 125
Operations Expense, 2015 113
Operations Expense, 2016 111
Interest Expense, 2012 1,017
Interest Expense, 2013 2,112
Interest Expense, 2014 1,383
Interest Expense, 2015 442
Interest Expense, 2016 $ 0