CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 25, 2015
Statement of Comprehensive Income [Abstract]
Tax of amortization of pension actuarial loss	$ 549	$ 612	$ 527
Tax (expense) benefit of pension adjustment to funded status	(3,106)	$ (5,478)	(3,429)
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Tax	$ 394		$ 130