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Income Taxes (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Income Taxes [Line Items]      
Computed expected tax expense $ 5,116 $ 4,194 $ 5,323
State income taxes, net of federal benefit 146 140 140
Stock-based compensation and other permanent differences 239 40 (60)
Total income tax expense $ 5,501 $ 4,374 $ 5,403