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PENSION PLANS - Net Periodic Pension Costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 28, 2018
Jul. 29, 2017
Compensation Related Costs [Abstract]    
Service cost $ 259 $ 388
Interest cost on projected benefit obligation 2,515 2,424
Expected return on plan assets (3,280) (3,684)
Loss on settlement 866 965
Amortization of gains and losses 569 1,343
Net periodic pension cost $ 929 $ 1,436