Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details)

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Capital Stock and Stock Restrictions (Details)
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Equity, Class of Treasury Stock [Line Items]      
Treasury Stock, Shares (17,130,965) (16,969,296)  
Class A Common Stock [Member]
      
Equity, Class of Treasury Stock [Line Items]      
Common Stock, Shares, Outstanding 44,969,841 50,429,000 54,174,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 808,000 158,000 912,000
Conversion of Stock, Shares Converted     (619,000)
Treasury Stock, Shares, Acquired (162,000) (5,788,000) (6,552,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 237,000 171,000 1,276,000
Common Stock, Shares, Outstanding 45,852,740 44,969,841 50,429,000
Class B Common Stock [Member]
      
Equity, Class of Treasury Stock [Line Items]      
Common Stock, Shares, Outstanding     14,556,000
Conversion of Stock, Shares Converted     (619,000)
Common Stock, Shares, Outstanding 13,937,151 13,937,151 13,937,000
Treasury Stock [Member]
      
Equity, Class of Treasury Stock [Line Items]      
Treasury Stock, Shares (16,969,000) (11,181,000) (4,629,000)
Treasury Stock, Shares, Acquired (162,000) (5,788,000) (6,552,000)
Treasury Stock, Shares (17,131,000) (16,969,000) (11,181,000)