PENSION PLANS - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 29, 2016	Oct. 24, 2015
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 139	$ 1,104
Interest cost on projected benefit obligations	604	827
Expected return on plan assets	(973)	(940)
Amortization of net losses	378	482
Net periodic pension cost	$ 148	$ 1,473