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Stockholders' Equity and Earnings Per Share (Tables)
3 Months Ended
Dec. 31, 2011
Stockholders' Equity and Earnings Per Share (Tables) [Abstract]  
Schedule of Comprehensive Income (Loss) [Table Text Block]
  2011 2010
 Net income$ 162,116 $ 160,500
 Foreign currency translation adjustments and other  6,487   6,702
  Comprehensive income $ 168,603 $ 167,202
Schedule of Weighted Average Number of Shares [Table Text Block]
   Three months ended
   December 31,
 (in thousands) 2011 2010
 Weighted average common shares outstanding - basic  258,461  275,605
  Effect of dilutive securities: stock options,    
  restricted stock, and restricted stock units  4,623  5,088
 Weighted average common shares outstanding - diluted  263,084  280,693