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Stock-Based Compensation (Tables)
9 Months Ended
Jan. 31, 2018
Stock-Based Compensation [Abstract]  
Schedule of Restricted Stock Data for Awards Granted
The following table summarizes restricted stock awards granted by the Company:
 
  
Nine Months
Ended January 31,
 
  
2018
  
2017
 
Restricted Stock:
      
Awards granted
  
528
   
509
 
Weighted average fair value of grant
 
$
53.27
  
$
50.56