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Income Tax Expense (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Current:      
Federal $ 14,486 $ 2,168 $ 3,216
State 3,759 1,495 3,676
Deferred 1,676 12,913 15,831
Income tax expense $ 19,921 $ 16,576 $ 22,723