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Note 15. Income Taxes (Tables)
3 Months Ended
Nov. 30, 2012
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
   
Three Months Ended
November 30,
       
   
2012
   
2011
   
Change
 
U.S. operations
  $ 61,067     $ 57,088       7.0 %
Non-U.S. operations
    10,446       9,942       5.1 %
Income before income taxes
  $ 71,513     $ 67,030       6.7 %
U.S. operations
  $ 19,340     $ 19,363       (0.1 ) %
Non-U.S. operations
    2,404       2,123       13.2 %
Total provision for income taxes
  $ 21,744     $ 21,486       1.2 %
Effective tax rate
    30.4 %*     32.1 %        
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Three Months Ended
November 30,
 
   
2012
   
2011
 
Current
           
U.S. federal
  $ 16,358     $ 17,586  
U.S. state and local
    1,289       1,470  
Non-U.S.
    2,684       2,272  
Total current taxes
  $ 20,331     $ 21,328  
Deferred
               
U.S. federal
  $ 1,576     $ 280  
U.S. state and local
    117       27  
Non-U.S.
    (280 )     (149 )
Total deferred taxes
  $ 1,413     $ 158  
Total provision for income taxes
  $ 21,744     $ 21,486  
ScheduleOfDeferredTaxAssetsTableTextBlock
 
 
November 30, 2012
   
August 31, 2012
 
Deferred tax assets
 
             
Current
 
             
Receivable reserve
 
$
639
   
$
687
 
Deferred rent
   
3,076
     
3,175
 
Deferred fees
 
 
642
     
1,223
 
Net current deferred taxes
 
$
4,357
   
$
5,085
 
Non-current
 
             
Depreciation on property, equipment and leasehold improvements
 
$
3,898
   
$
2,498
 
Deferred rent
 
 
2,778
     
2,782
 
Stock-based compensation
   
21,241
     
23,395
 
Purchased intangible assets, including acquired technology
 
 
(7,139
)
   
(6,801
)
Other
   
1,286
     
1,239
 
Net non-current deferred taxes
 
$
22,064
   
$
23,113
 
Total deferred tax assets
 
$
26,421
   
$
28,198
 
   
November 30, 2012
   
August 31, 2012
 
Deferred tax liabilities (non-current)
           
Purchased intangible assets, including acquired technology
  $ 2,953     $ 2,936  
Stock-based compensation
    (371 )     (343 )
Total deferred tax liabilities (non-current)
  $ 2,582     $ 2,593  
Summary of Income Tax Contingencies [Table Text Block]
Unrecognized income tax benefits at August 31, 2012
  $ 5,464  
Additions based on tax positions related to the current year
    112  
Additions for tax positions of prior years
    123  
Unrecognized income tax benefits at November 30, 2012
  $ 5,699  
Summary of Income Tax Examinations [Table Text Block]
Major Tax Jurisdictions
  Open Tax Years
U.S.
 
 
Federal
  2009 through 2012
State (various)
  2008 through 2012
Europe
 
 
France
  2010 through 2012
United Kingdom
  2011 through 2012