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Stock-Based Compensation (Tables)
3 Months Ended
Jul. 31, 2022
Stock-Based Compensation [Abstract]  
Awards Granted to Employees
The following table summarizes awards we granted to employees (shares in thousands):
 
Three Months Ended
July 31,
 
   
2022
   
2021
 
Restricted Stock:
           
Awards granted (shares)
   
494
     
433
 
Weighted average fair value of grant
 
$
45.99
   
$
57.36
 
Significant Assumptions Used in Fair Value Determination
The following table provides the estimated weighted average fair value for options granted during the three months ended July 31, 2022 and 2021 using the Black-Scholes option-pricing model, and the significant weighted average assumptions used in their determination.

 
Three Months Ended
July 31,
 
   
2022
   
2021
 
Weighted average fair value of options on grant date
 
$
9.42
   
$
11.80
 
                 
Weighted Average Assumptions:
               
Expected life of options (years)
   
5.9
     
6.3
 
Risk-free interest rate
   
0.5
%
   
1.1
%
Expected volatility
   
31.2
%
   
30.6
%
Expected dividend yield
   
3.0
%
   
2.4
%
Fair value of common stock on grant date
 
$
45.99
   
$
57.34
 
Exercise price of stock option grant
 
$
45.99
   
$
63.07