Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jan. 25, 2013	Apr. 27, 2012
Condensed Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,500,000	2,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	31,238,945	30,638,605
Common stock, shares outstanding	27,701,851	27,529,320
Treasury stock, common shares	3,537,094	3,109,285