PENSION PLANS - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 29, 2017	Apr. 23, 2016	Apr. 29, 2017	Apr. 23, 2016
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 61	$ 774	$ 316	$ 2,982
Interest cost on projected benefit obligations	607	770	1,817	2,424
Expected return on plan assets	(973)	(927)	(2,920)	(2,807)
Amortization of net losses	347	399	1,102	1,363
Net periodic pension cost	$ 42	$ 1,016	$ 315	$ 3,962