Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details)

v3.19.1
Capital Stock and Stock Restrictions (Details) - shares
 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Equity, Class of Treasury Stock [Line Items]    
Treasury Stock, Shares Start (4,633,871)  
Treasury Stock, Shares End (5,122,414) (4,633,871)
Class A Common Stock [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common Stock, Shares, Outstanding Start 12,145,743 12,015,000
Treasury Stock, Shares, Acquired (489,000) (193,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 253,000 324,000
Common Stock, Shares, Outstanding End 11,909,979 12,145,743
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 (4,634,000) (4,441,000)
Treasury Stock, Shares, Acquired (489,000) (193,000)
Treasury Stock, Shares End (5,123,000) (4,634,000)