PENSION PLANS - Changes in Benefit Obligations and Reconciliation of Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 25, 2015
Compensation Related Costs [Abstract]
Defined Benefit Plan, Curtailments	$ 0	$ (17,904)
Changes in Benefit Obligation:
Benefit obligation at beginning of year	80,021	83,961
Service cost	388	3,099	$ 3,642
Interest cost on projected benefit obligation	2,424	3,031	3,055
Benefits paid	(549)	(3,440)
Settlement	(4,487)	0
Actuarial loss	(6,096)	11,274
Benefit obligation at end of year	71,701	80,021	83,961
Changes in Plan Assets:
Fair value of plan assets at beginning of year	53,281	51,729
Actual return on plan assets	5,262	1,468
Employer contributions	3,000	3,524
Benefits paid	(549)	(3,440)
Settlements paid	(4,487)	0
Fair value of plan assets at end of year	56,507	53,281	$ 51,729
Funded status at end of year	15,194	26,740
Amounts recognized in the consolidated balance sheets:
Pension liabilities	(15,194)	(26,740)
Accumulated other comprehensive loss, net of income taxes	7,406	13,339
Amounts included in Accumulated other comprehensive loss (pre-tax):
Net actuarial loss	$ 12,521	$ 22,502