COSTS AND ESTIMATED EARNINGS ON CONTRACTS IN EXCESS OF BILLINGS (Details) (USD $) In Thousands, unless otherwise specified	Jul. 28, 2012	Jul. 30, 2011
Costs and Estimated Earnings on Contracts in Excess of Billings [Abstract]
Costs incurred on contracts in progress	$ 100,766	$ 71,685
Estimated to date earnings	26,555	19,170
Total costs and estimated earnings	127,321	90,855
Less: billings to date	(1,522)	(749)
Costs in excess of billings on uncompleted contracts or programs	125,799	90,106
Included in the accompanying consolidated balance sheets under the captions:
Costs and estimated earnings in excess of billings	127,321	90,855
Billings in excess of costs and estimated earnings	(1,522)	(749)
Costs in excess of billings on uncompleted contracts or programs	$ 125,799	$ 90,106