CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Apr. 26, 2014	Apr. 27, 2013
Statement Of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 9,873	$ 5,808
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	600,000	600,000
Common stock, issued shares	103,965	105,570
Common stock, outstanding shares	103,965	105,570