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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Net Income Per Share (Details) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Jul. 30, 2016 USD ($) class_common_stock $ / shares shares | Jul. 25, 2015 USD ($) $ / shares shares | Jul. 26, 2014 USD ($) $ / shares shares
Accounting Policies [Abstract] |  |  |
Number of common stock classes | class_common_stock | 2 |  |
Common stock cash dividends, percent Class A is entitled greater than Class B | 54.00% |  |
Class A Common Stock |  |  |
Numerator: |  |  |
Net income allocated, basic | $ | $ 18,967 | $ 23,050 | $ 3,788
Conversion of Class B to Class A shares | $ | 5,563 | 6,885 | 1,141
Effect of share-based compensation on allocated net income | $ | 0 | 46 | (20)
Net income allocated, diluted | $ | $ 24,530 | $ 29,981 | $ 4,909
Denominator: |  |  |
Weighted average shares outstanding, basic (in shares) | shares | 9,567 | 9,459 | 9,258
Conversion of Class B to Class A shares (in shares) | shares | 4,319 | 4,353 | 4,374
Dilutive effect of share-based compensation (in shares) | shares | 0 | 48 | 62
Weighted average shares outstanding, diluted (in shares) | shares | 13,886 | 13,860 | 13,694
Net income per share |  |  |
Basic (in dollars per share) | $ / shares | $ 1.98 | $ 2.44 | $ 0.41
Diluted (in dollars per share) | $ / shares | $ 1.77 | $ 2.16 | $ 0.36
Class B Common Stock |  |  |
Numerator: |  |  |
Net income allocated, basic | $ | $ 5,563 | $ 6,885 | $ 1,141
Conversion of Class B to Class A shares | $ | 0 | 0 | 0
Effect of share-based compensation on allocated net income | $ | (3) | (23) | (11)
Net income allocated, diluted | $ | $ 5,560 | $ 6,862 | $ 1,130
Denominator: |  |  |
Weighted average shares outstanding, basic (in shares) | shares | 4,319 | 4,353 | 4,374
Conversion of Class B to Class A shares (in shares) | shares | 0 | 0 | 0
Dilutive effect of share-based compensation (in shares) | shares | 0 | 0 | 0
Weighted average shares outstanding, diluted (in shares) | shares | 4,319 | 4,353 | 4,374
Net income per share |  |  |
Basic (in dollars per share) | $ / shares | $ 1.29 | $ 1.58 | $ 0.26
Diluted (in dollars per share) | $ / shares | $ 1.29 | $ 1.58 | $ 0.26

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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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