PENSION PLANS - Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 25, 2020
Compensation Related Costs [Abstract]
Service cost	$ 216	$ 202
Interest cost on projected benefit obligation	1,689	2,154
Expected return on plan assets	(1,932)	(2,792)
Loss on settlement	587	1,604
Amortization of gains and losses	588	555
Net periodic pension cost	$ 1,148	$ 1,723