CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2016	Apr. 25, 2015
Statement of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 12,008	$ 7,678
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	600,000,000	600,000,000
Common stock, issued shares (in shares)	99,107,000	103,278,000
Common stock, outstanding shares (in shares)	99,107,000	103,278,000