CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Oct. 23, 2015	Apr. 24, 2015
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	42,638,000	42,638,000
Treasury stock, shares outstanding (in shares)	21,259,000	19,231,000