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Capital Stock and Changes in Capital Accounts (Tables)
 12 Months Ended
Apr. 30, 2020
Capital Stock and Changes in Capital Accounts [Abstract]  
Summary of Shares Repurchased
The following table summarizes the shares repurchased of Class A and B Common Stock:

  
2020
    
2019
    
2018
  
Shares repurchased – Class A
    
1,079,936
      
1,191,496
      
713,177
  
Shares repurchased – Class B
    
2,281
      
—
      
—
  
Average Price – Class A and Class B
  
$
43.05
    
$
50.35
    
$
55.65
  
Summary of Changes of Common Stock and Common Stock in Treasury
The following is a summary of changes during the years ended April 30, in shares of our common stock and common stock in treasury (shares in thousands).

Changes in Common Stock A:
  
2020
    
2019
    
2018
  
Number of shares, beginning of year
    
70,127
      
70,111
      
70,086
  
Common stock class conversions and other
    
39
      
16
      
25
  
Number of shares issued, end of year
    
70,166
      
70,127
      
70,111
  
                         
Changes in Common Stock A in treasury:
                        
Number of shares held, beginning of year
    
22,634
      
21,853
      
22,097
  
Purchase of treasury shares
    
1,080
      
1,192
      
713
  
Restricted shares issued under stock-based compensation plans - non-PSU Awards
    
(232
)
    
(205
)
    
(133
)
Restricted shares issued under stock-based compensation plans - PSU Awards
    
(68
)
    
(110
)
    
(126
)
Shares issued under the Director Plan to Directors
    
(97
)
    
(5
)
    
(20
)
Stock grants of fully vested Class A shares - common stock
    
—
      
—
      
(20
)
Restricted shares, forfeited
    
1
      
9
      
15
  
Restricted shares issued from exercise of stock options
    
(34
)
    
(229
)
    
(788
)
Shares withheld for taxes
    
122
      
130
      
116
  
Other
    
(1
)
    
(1
)
    
(1
)
Number of shares held, end of year
    
23,405
      
22,634
      
21,853
  
Number of Common Stock A outstanding, end of year
    
46,761
      
47,493
      
48,258
  

Changes in Common Stock B:
  
2020
    
2019
    
2018
  
Number of shares, beginning of year
    
13,055
      
13,071
      
13,096
  
Common stock class conversions and other
    
(39
)
    
(16
)
    
(25
)
Number of shares issued, end of year
    
13,016
      
13,055
      
13,071
  
                         
Changes in Common Stock B in treasury:
                        
Number of shares held, beginning of year
    
3,918
      
3,918
      
3,918
  
Shares repurchased
    
2
      
—
      
—
  
Number of shares held, end of year
    
3,920
      
3,918
      
3,918
  
Number of Common Stock B outstanding, end of year
    
9,096
      
9,137
      
9,153
  
Cash Dividends Paid
The following table summarizes the cash dividends paid during the year ended April 30, 2020:

Date of Declaration by Board of Directors
Quarterly Cash Dividend
Total Dividend
Class of Common Stock
Dividend Paid Date
Shareholders of Record as of Date
June 27, 2019
$0.34 per common share
$19.2 million
Class A and
Class B
July 24, 2019
July 10, 2019
September 26, 2019
$0.34 per common share
$19.1 million
Class A and
Class B
October 23, 2019
October 8, 2019
December 18, 2019
$0.34 per common share
$19.0 million
Class A and
Class B
January 16, 2020
January 2, 2020
March 18, 2020
$0.34 per common share
$19.0 million
Class A and
Class B
April 15, 2020
March 31, 2020