PENSION PLANS - Changes in Benefit Obligations and Reconciliation of Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 25, 2015	Jul. 26, 2014	Jul. 27, 2013
Changes in Benefit Obligation:
Benefit obligation at beginning of year	$ 77,090	$ 63,644
Service cost	3,642	2,926	$ 3,279
Interest cost on projected benefit obligation	3,055	2,775	2,479
Benefits paid	(3,769)	(1,445)
Settlement	(3,033)	0
Actuarial loss	6,976	9,190
Benefit obligation at end of year	83,961	77,090	63,644
Changes in Plan Assets:
Fair value of plan assets at beginning of year	50,129	43,582
Actual return on plan assets	2,279	4,672
Employer contributions	6,203	3,320
Benefits paid	(3,769)	(1,445)
Settlements paid	(3,113)	0
Fair value of plan assets at end of year	51,729	50,129	$ 43,582
Funded status at end of year	(32,232)	(26,961)
Amounts recognized in the consolidated balance sheets:
Accrued wages and benefits	0	(3,085)
Pension liabilities	(32,232)	(23,876)
Accumulated other comprehensive loss, net of income taxes	16,874	12,465
Amounts included in Accumulated other comprehensive loss (pre-tax):
Net actuarial loss	$ 28,459	$ 21,018