COMMITMENTS AND CONTINGENCIES (Details 2) (USD $)	12 Months Ended
Aug. 02, 2014
Inventories
Purchase commitment
Outstanding purchase commitments	$ 29,400,000
Diesel fuel
Purchase commitment
Outstanding purchase commitments	$ 32,551,000

The minimum amount the entity agreed to spend under the long-term purchase commitment.

No definition available.

Name:	us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration