Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details)

v3.21.1
Capital Stock and Stock Restrictions (Details) - shares
 12 Months Ended
Oct. 01, 2020
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Equity, Class of Treasury Stock [Line Items]        
Treasury Stock, Shares Start   (5,215,453)    
Treasury Stock, Shares, Acquired (4,900,000)      
Treasury Stock, Shares End   (10,169,753) (5,215,453)  
Class A Common Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Treasury Stock, Shares, Acquired   (4,954,300) (93,039)  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   251,121 407,510  
Common Stock, Shares, Issued   7,521,271 12,224,450 11,909,979
Class B Common Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Common Stock, Shares, Issued   3,484,287 3,484,287 3,484,287
Treasury Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Treasury Stock, Shares Start   (5,215,453) (5,122,414)  
Treasury Stock, Shares, Acquired   (4,954,300) (93,039)  
Treasury Stock, Shares End   (10,169,753) (5,215,453)