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Goodwill and Intangible Assets (Tables)
3 Months Ended
Jul. 31, 2018
Goodwill and Intangible Assets [Abstract]  
Activity in Goodwill by Segment
Goodwill

The following table summarizes the activity in goodwill by segment as of July 31, 2018:

  
April 30, 2018
  
Foreign
Translation
Adjustment
  
July 31, 2018
 
Research
 
$
463,419
  
$
(17,787
)
 
$
445,632
 
Publishing
  
295,401
   
(4,925
)
  
290,476
 
Solutions
  
260,981
   
   
260,981
 
Total
 
$
1,019,801
  
$
(22,712
)
 
$
997,089
 

Intangible Assets
Intangible Assets

Identifiable intangible assets, net consisted of the following:

  
July 31, 2018
  
April 30, 2018
 
Intangible Assets with Determinable Lives, net:
      
Content and Publishing Rights
 
$
415,482
  
$
436,760
 
Customer Relationships
  
157,196
   
161,729
 
Brands and Trademarks
  
14,679
   
16,100
 
Covenants not to Compete
  
602
   
655
 
Total
  
587,959
   
615,244
 
Intangible Assets with Indefinite Lives:
        
Brands and Trademarks
  
132,832
   
138,589
 
Content and Publishing Rights
  
90,367
   
94,238
 
Total
  
223,199
   
232,827
 
Total Intangible Assets, Net
 
$
811,158
  
$
848,071