PENSION PLANS - Changes in Benefit Obligations and Reconciliation of Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 25, 2020
Changes in Benefit Obligation:
Benefit obligation at beginning of year	$ 76,849	$ 69,932
Service cost	216	202
Interest cost	1,689	2,154
Benefits paid	(796)	(887)
Settlement	(2,563)	(6,733)
Actuarial loss	(2,166)	12,181
Benefit obligation at end of year	73,229	76,849
Changes in Plan Assets:
Fair value of plan assets at beginning of year	70,683	65,173
Actual return on plan assets	(4,277)	13,130
Employer contributions	0	0
Benefits paid	(796)	(887)
Settlements paid	(2,563)	(6,733)
Fair value of plan assets at end of year	63,047	70,683
Funded status at end of year	10,182	6,166
Amounts recognized in the consolidated balance sheets:
Pension liabilities	10,182	6,166
Accumulated other comprehensive loss, net of income taxes	9,833	8,092
Amounts included in Accumulated other comprehensive loss (pre-tax):
Net actuarial loss	$ 14,167	$ 11,299