COMMON STOCK AND STOCK-BASED COMPENSATION - Stock Plan Terms and Stock Options Activity (Details) (USD $)	3 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 27, 2013 2010 Stock Plan Stock options	Jul. 27, 2013 2010 Stock Plan Stock options	Jul. 27, 2013 2007 Stock Plan Stock options	Jul. 27, 2013 2007 Stock Plan Stock options	Jul. 27, 2013 2000 and 2004 Stock Plans Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage			33.30%		33.30%
Award expiration period			10 years		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding - beginning balance (in shares)				360,000		778,000	73,185
Outstanding - beginning balance - wtd avg exercise price				$ 9.53		$ 5.94	$ 11.44
Granted (in shares)			120,000	120,000	42,500	42,500
Granted - wtd avg exercise price				$ 17.27		$ 17.27
Options exercised (in shares)	(97,007)	0		0		(25,832)	(71,775)
Exercised - wtd avg exercise price				$ 0.00		$ 10.08	$ 11.44
Cancelled (in shares)				0		0
Cancelled - wtd avg exercise price				$ 0.00		$ 0.00
Expired (in shares)							(1,410)
Expired - wtd avg exercise price							$ 11.44
Outstanding - ending balance (in shares)			480,000	480,000	794,668	794,668	0
Outstanding - ending balance - wtd avg exercise price			$ 11.46	$ 11.46	$ 6.41	$ 6.41	$ 0.00