SHAREHOLDERS’ EQUITY - Additional Information (Details)	3 Months Ended	12 Months Ended
	Jan. 26, 2013 USD ($) $ / shares	Jul. 25, 2015 USD ($) class_common_stock plan vote $ / shares shares	Jul. 26, 2014 USD ($) $ / shares shares	Jul. 27, 2013 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	0
Number of share-based compensation plans | plan		3
Compensation cost charged against income		$ 3,169,000	$ 3,229,000	$ 3,222,000
Income tax benefit recognized		$ 1,134,000	$ 1,148,000	1,140,000
Weighted-average remaining contractual term of options outstanding		6 years 6 months
Weighted-average remaining contractual term of options exercisable		4 years 7 months 6 days
Aggregate intrinsic value of options outstanding		$ 417,000
Aggregate intrinsic value of options exercisable		$ 402,000
Weighted-average grant date fair value of options granted | $ / shares		$ 4.32	$ 6.41
Intrinsic value of options exercised		$ 1,090,000	$ 113,000	1,344,000
Fair value of restricted shares vested		576,000	8,663,000	60,000
Unrecognized compensation costs related to nonvested stock options and restricted stock granted		$ 5,408,000
Weighted-average period of compensation cost expected to be recognized		1 year 8 months 12 days
Cash received from option exercises under share-based compensation arrangements		$ 2,392,000	217,000	1,742,000
Actual tax benefit realized		$ 424,000	$ 46,000	$ 537,000
Special dividends	$ 12,009,000
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
Number of shares repurchased (in shares) | shares		0
Special dividends per share (in dollars per share) | $ / shares	$ 1.00
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		364,855
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%
Special dividends per share (in dollars per share) | $ / shares	$ 0.65