DEBT AND CREDIT AGREEMENT (Details) (Line of credit, USD $)	3 Months Ended
	Jul. 27, 2013
Line of credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000,000
Possible increase of maximum borrowing capacity subject to customary conditions and lender approval	50,000,000
Basis spread on LIBOR variable rate	1.50%
Variable interest rate description	LIBOR
Increase, additional borrowings	14,500,000
Interest expense	227,000
Amount outstanding	52,500,000
Remaining borrowing capacity	$ 47,500,000