ACCRUED INSURANCE CLAIMS (Details) (USD $)	12 Months Ended
	Jul. 28, 2012	Jul. 30, 2011
Accrued Insurance Claims [Abstract]
Retained risk of loss, Automobile liability, Maximum in fiscal 2012 and 2013	$ 1,000,000
Retained risk of loss, General liability, Maximum in fiscal 2012 and 2013	1,000,000
Retained risk of loss, Workers' compensation, Maximum in fiscal 2012 and 2013	1,000,000
Number of states participating in a state sponsored insurance fund	2
Aggregate stop loss coverage for automobile liability, general liability and workers' compensation claims in fiscal 2012	38,700,000
Aggregate stop loss coverage for automobile liability, general liability and workers' compensation claims in fiscal 2013	41,800,000
Annual retained risk of loss under the employee health plan per participant	250,000
Retained risk of loss per participant for employee health plan for claim amounts that aggregate across all participants in excess of $250,000	550,000
Threshold for retained risk of loss per participant for employee health plan	250,000
Amounts expected to be paid within one year:
Accrued auto, general liability and workers' compensation	16,514,000	16,708,000
Accrued employee group health	2,867,000	2,728,000
Accrued damage claims	5,837,000	6,656,000
Accrued insurance claims	25,218,000	26,092,000
Amounts expected to be paid beyond one year:
Accrued auto, general liability and workers' compensation	21,423,000	20,539,000
Accrued damage claims	2,168,000	2,805,000
Accrued insurance claims, Noncurrent	23,591,000	23,344,000
Total accrued insurance claims	$ 48,809,000	$ 49,436,000