Stockholders Equity (detail) - USD ($)	Dec. 26, 2015	Mar. 31, 2015	Dec. 27, 2014
Treasury Stock, at cost	$ 63,358,000	$ 61,277,000	$ 39,095,000
Class B Common Stock Converted To Class Aa Common [Member]
Treasury Stock, at cost	$ 2,000
Shares, Issued	60
Treasury Stock [Member]
Shares, Issued	2,220,218
Common Stock [Member]
Treasury Stock, at cost	$ 2,078,000
Shares, Issued	73,844