PENSION PLANS - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 26, 2019	Oct. 27, 2018
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 51	$ 53
Interest cost on projected benefit obligations	565	655
Expected return on plan assets	(703)	(721)
Amortization of net losses	145	145
Net periodic pension cost	$ 58	$ 132