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Stock Compensation - Consolidated Stock Compensation Expense (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock compensation expense $ 31,214 $ 30,505 $ 16,710
Related tax benefit 10,265 10,636 5,837
Noncontrolling interest 8,177 9,057 4,932
Net $ 12,772 $ 10,812 $ 5,941