Capital Stock and Stock Restrictions (Details)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares	(17,466,855)	(17,130,965)
Class A Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Common Stock, Shares, Outstanding	45,852,740	44,970,000	50,429,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	415,000	808,000	158,000
Treasury Stock, Shares, Acquired	(336,000)	(162,000)	(5,788,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	907,000	237,000	171,000
Common Stock, Shares, Outstanding	46,839,361	45,852,740	44,970,000
Class B Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Common Stock, Shares, Outstanding				13,937,000
Common Stock, Shares, Outstanding	13,937,151	13,937,151	13,937,000	13,937,000
Treasury Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares	(17,131,000)	(16,969,000)	(11,181,000)
Treasury Stock, Shares, Acquired	(336,000)	(162,000)	(5,788,000)
Treasury Stock, Shares	(17,467,000)	(17,131,000)	(16,969,000)