5. The Company Sponsors Four Defined Benefit Pension Plans. Net Periodic Pension Costs For The Four Plans Includes The Following Components: Schedule of Net Benefit Costs Recognized (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 27, 2012	Oct. 27, 2011
Defined Benefit Plan, Service Cost	$ 818	$ 664
Defined Benefit Plan, Interest Cost	618	678
Defined Benefit Plan, Expected Return on Plan Assets	(694)	(631)
Defined Benefit Plan Amortization Of (Gains) Losses	529	330
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	2	2
Defined Benefit Plan, Net Periodic Benefit Cost	$ 1,273	$ 1,043