PENSION PLANS - Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 27, 2019	Jul. 28, 2018
Compensation Related Costs [Abstract]
Service cost	$ 213	$ 259
Interest cost on projected benefit obligation	2,674	2,515
Expected return on plan assets	(2,873)	(3,280)
Loss on settlement	441	866
Amortization of gains and losses	605	569
Net periodic pension cost	$ 1,060	$ 929