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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 $ 6,356
Amortization Expense, 2013 8,665
Amortization Expense, 2014 1,399
Amortization Expense, 2015 277
Amortization Expense, 2016 218
Operations Expense, 2012 129
Operations Expense, 2013 119
Operations Expense, 2014 108
Operations Expense, 2015 96
Operations Expense, 2016 94
Interest Expense, 2012 2,341
Interest Expense, 2013 2,031
Interest Expense, 2014 670
Interest Expense, 2015 370
Interest Expense, 2016