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Income Taxes (Details) (USD $)
In Thousands
12 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2009
Earnings before income taxes, and the related provision for income taxes   
Domestic$ 37,955$ 38,329$ 46,504
Foreign2,5453,0712,819
Total earnings before income taxes40,50041,40049,323
Federal   
Current provision13,33613,62615,094
Temporary differences   
Fixed asset basis differences and depreciation(155)5816
Intangible asset basis differences and amortization(312)(335)(363)
Currently non-deductible expenses and reserves(627)(29)(134)
Stock based compensation(706)(618)(373)
Other, net35(75)48
Subtotal11,57112,62714,288
State and local1,2131,1861,385
Foreign885940891
Total income tax provision$ 13,669$ 14,753$ 16,564