PENSION PLANS - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 24, 2020	Oct. 26, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 54	$ 51
Interest cost on projected benefit obligations	422	565
Expected return on plan assets	(483)	(703)
Amortization of net losses	147	145
Net periodic pension cost	$ 140	$ 58