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Note 8 - Business Combinations (Details) - Purchase Price Allocation (USD $)
In Thousands, unless otherwise specified
May 31, 2014
Aug. 31, 2013
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Goodwill $ 287,287 $ 244,573
Data Content [Member] | Revere Data, LLC [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 2,799  
Data Content [Member] | Matrix Data Limited [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 3,408  
Client Relationships [Member] | Revere Data, LLC [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 827  
Client Relationships [Member] | Matrix Data Limited [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 2,816  
Non-Compete Agreements [Member] | Revere Data, LLC [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 162  
Non-Compete Agreements [Member] | Matrix Data Limited [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 147  
Trade Names [Member] | Revere Data, LLC [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 293  
Trade Names [Member] | Matrix Data Limited [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 670  
Software Technology [Member] | Matrix Data Limited [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Amortizable Intangible Assets 1,708  
Revere Data, LLC [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Tangible assets acquired 544  
Goodwill 11,612  
Total assets acquired 16,237  
Liabilities assumed (949)  
Net assets acquired 15,288  
Matrix Data Limited [Member]
   
Note 8 - Business Combinations (Details) - Purchase Price Allocation [Line Items]    
Tangible assets acquired 7,459  
Goodwill 25,531  
Total assets acquired 41,739  
Liabilities assumed (9,941)  
Net assets acquired $ 31,798