Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details)

v3.4.0.3
Capital Stock and Stock Restrictions (Details) - shares
 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Equity, Class of Treasury Stock [Line Items]      
Treasury Stock, Shares (17,466,855)    
Treasury Stock, Shares (17,560,758) (17,466,855)  
Class A Common Stock [Member]      
Equity, Class of Treasury Stock [Line Items]      
Common Stock, Shares, Outstanding 46,839,361 45,853,000 44,970,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period   415,000 808,000
Treasury Stock, Shares, Acquired (94,000) (336,000) (162,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 440,000 907,000 237,000
Common Stock, Shares, Outstanding 47,184,725 46,839,361 45,853,000
Class B Common Stock [Member]      
Equity, Class of Treasury Stock [Line Items]      
Common Stock, Shares, Outstanding 13,937,151 13,937,000 13,937,000
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 (17,467,000) (17,131,000) (16,969,000)
Treasury Stock, Shares, Acquired (94,000) (336,000) (162,000)
Treasury Stock, Shares (17,561,000) (17,467,000) (17,131,000)