PENSION PLANS - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 28, 2017	Oct. 29, 2016
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 65	$ 139
Interest cost on projected benefit obligations	629	604
Expected return on plan assets	(820)	(973)
Amortization of net losses	142	378
Net periodic pension cost	$ 16	$ 148