Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details)

v3.20.1
Capital Stock and Stock Restrictions (Details) - shares
 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Equity, Class of Treasury Stock [Line Items]    
Treasury Stock, Shares Start (5,122,414)  
Treasury Stock, Shares End (5,215,453) (5,122,414)
Class A Common Stock [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common Stock, Shares, Outstanding Start 11,909,979 12,146,000
Treasury Stock, Shares, Acquired (92,000) (489,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 407,000 253,000
Common Stock, Shares, Outstanding End 12,224,450 11,909,979
Class B Common Stock [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common Stock, Shares, Outstanding Start 3,484,287 3,484,000
Common Stock, Shares, Outstanding End 3,484,287 3,484,287
Treasury Stock [Member]    
Equity, Class of Treasury Stock [Line Items]    
Treasury Stock, Shares Start (5,123,000) (4,634,000)
Treasury Stock, Shares, Acquired (92,000) (489,000)
Treasury Stock, Shares End (5,215,000) (5,123,000)