Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Mar. 30, 2013
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 312	$ 434
Property and equipment, accumulated depreciation	$ 545,419	$ 538,494
Preferred stock, par value
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value
Common stock, shares authorized	500,000	500,000
Common stock, shares issued	282,534	280,160
Common stock, shares outstanding	282,534	280,160