PENSION PLANS - Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014
Compensation Related Costs [Abstract]
Service cost	$ 3,099	$ 3,642	$ 2,926
Interest cost on projected benefit obligation	3,031	3,055	2,775
Expected return on plan assets	(3,645)	(3,719)	(3,194)
Gain on settlement	0	(239)	0
Amortization of gains and losses	1,504	1,295	804
Net periodic pension cost	$ 3,989	$ 4,034	$ 3,311