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Geographic Information (Table)
12 Months Ended
Sep. 30, 2012
Geographic Information  
Schedule of Revenue and Long-Lived Assets by Geographical Area [Table Text Block]
            
    2012 2011 2010
 Revenues for the fiscal years ended September 30        
  United States$ 1,776,414 $ 1,304,794 $ 1,074,226
  International  298,732   260,546   155,116
   Total$ 2,075,146 $ 1,565,340 $ 1,229,342
            
 Long-lived assets as of September 30        
  United States$ 29,001 $ 18,953 $ 9,762
  International  6,783   6,256   5,476
   Total$ 35,784 $ 25,209 $ 15,238