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Share-Based Compensation (Tables)
6 Months Ended
Oct. 31, 2016
Share-Based Compensation [Abstract]  
Schedule of Restricted Stock Data for Awards Granted
The following table provides restricted stock data for awards granted by the Company:
 
 
For the Six Months
Ended October 31,
 
2016
 
2015
Restricted Stock:
     
Awards granted (in thousands)
509
 
289
Weighted average fair value of grant
$50.56
 
$55.91
Weighted-Average Black-Scholes Fair Value Assumptions by Stock Option Grants
The weighted average Black-Scholes fair value assumptions for the fiscal year 2016 stock option grants were as follows:
 
Expected life of options (years)
  
7.2
 
Risk-free interest rate
  
2.1
%
Expected volatility
  
29.7
%
Expected dividend yield
  
2.1
%
Fair value of common stock on grant date
 
$
55.99