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SHAREHOLDERS’ EQUITY - Dividends declared and paid (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jul. 25, 2020
Jul. 27, 2019
Aggregate:    
Total common stock dividends paid $ 12,965 $ 12,890
Class A Common Stock    
Per share:    
Common stock dividends paid (in dollars per share) $ 1.00 $ 1.00
Aggregate:    
Common stock dividends paid $ 10,174 $ 10,096
Class B Common Stock    
Per share:    
Common stock dividends paid (in dollars per share) $ 0.65 $ 0.65
Aggregate:    
Common stock dividends paid $ 2,791 $ 2,794