SHAREHOLDERS’ EQUITY - Additional Information (Details)	12 Months Ended
	Jul. 30, 2016 USD ($) class_common_stock plan vote $ / shares shares	Jul. 25, 2015 USD ($) $ / shares shares	Jul. 26, 2014 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock classes | class_common_stock	2
Common stock cash dividends, percent Class A is entitled greater than Class B	54.00%
Preferred stock shares authorized (in shares) | shares	10,000,000	10,000,000
Preferred stock shares issued (in shares) | shares	0
Number of share-based compensation plans | plan	3
Compensation cost charged against income	$ 3,195,000	$ 3,169,000	$ 3,229,000
Income tax benefit recognized	$ 1,131,000	$ 1,134,000	1,148,000
Weighted-average remaining contractual term of options outstanding	5 years 8 months 12 days
Weighted-average remaining contractual term of options exercisable	3 years 6 months
Aggregate intrinsic value of options outstanding	$ 1,654,000
Aggregate intrinsic value of options exercisable	$ 1,002,000
Weighted-average grant date fair value of options granted | $ / shares	$ 4.79	$ 4.32
Intrinsic value of options exercised	$ 70,000	$ 1,090,000	113,000
Fair value of restricted shares vested	549,000	576,000	8,663,000
Unrecognized compensation costs related to nonvested stock options and restricted stock granted	$ 2,134,000
Weighted-average period of compensation cost expected to be recognized	8 months 16 days
Cash received from option exercises under share-based compensation arrangements	$ 813,000	2,392,000	217,000
Actual tax benefit realized	$ 29,000	$ 424,000	$ 46,000
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of votes entitled per share | vote	1
Authorized amount of share repurchase program	$ 5,000,000
Stock Repurchased During Period, Value	$ 978,000
Class A Common Stock | 2004 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized | shares	1,200,000
Vesting period	3 years
Expiration period	10 years
Shares remaining for future grants (in shares) | shares	0
Class A Common Stock | 2004 Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Class A Common Stock | 2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized | shares	1,200,000
Vesting period	3 years
Expiration period	10 years
Shares remaining for future grants (in shares) | shares	385,291
Class A Common Stock | 2010 Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of votes entitled per share | vote	10
Percentage of voting power (greater than)	50.00%