EMPLOYEE STOCK OWNERSHIP PLAN (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jul. 28, 2012	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010	Nov. 01, 1988
EMPLOYEE STOCK OWNERSHIP PLAN.
Percentage of outstanding common stock allocated to ESOP					40.00%
Outstanding common stock allocated to ESOP					$ 4.1
Interest rate on notes (as a percent)	1.33%	1.33%	1.33%
Contribution to the trust related to ESOP		0.2	0.2	0.2
Interest component of contribution made to trust related to ESOP		0.1	0.1	0.1
Changes in ESOP shares
Total ESOP shares - beginning of year		2,199,000	2,419,000
Shares distributed to employees		(146,000)	(220,000)
Total ESOP shares - end of year	2,053,000	2,053,000	2,199,000	2,419,000
ESOP shares
Allocated shares	1,955,000	1,955,000	1,657,000
Unreleased shares	98,000	98,000	542,000
Total ESOP shares	2,053,000	2,053,000	2,199,000	2,419,000
Number of shares released for allocation under ESOP		42,171	165,436
Number of shares allocated to correct an operational error under ESOP		402,085
Compensation expense recorded during the period	0.3
Fair value of unreleased shares	$ 5.3	$ 5.3	$ 22.6