Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Mar. 29, 2014
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 558	$ 313
Property and equipment, accumulated depreciation	$ 564,095	$ 552,901
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	290,594	284,858
Common stock, shares outstanding	290,594	284,858