PENSION PLANS - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 23, 2016	Jan. 24, 2015	Jan. 23, 2016	Jan. 24, 2015
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 1,104	$ 910	$ 2,208	$ 1,820
Interest cost on projected benefit obligations	827	764	1,654	1,528
Expected return on plan assets	(940)	(928)	(1,880)	(1,856)
Amortization of net losses	482	324	964	648
Net periodic pension cost	$ 1,473	$ 1,070	$ 2,946	$ 2,140