PENSION PLANS - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 24, 2021	Apr. 25, 2020	Apr. 24, 2021	Apr. 25, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 54	$ 51	$ 162	$ 152
Interest cost on projected benefit obligations	422	512	1,266	1,643
Expected return on plan assets	(483)	(733)	(1,449)	(2,061)
Loss on settlement	0	116	0	1,362
Amortization of net losses	147	144	441	435
Net periodic pension cost	$ 140	$ 90	$ 420	$ 1,531