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Note 6 - Net Income Per Share (Details) - Summary of Earnings Per Share Basic Two Class Method (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2014 | May 25, 2013 | May 31, 2014 | May 25, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Net income | $ 30,944 | $ 28,722 | $ 91,053 | $ 86,124
Allocation of net income for Basic | 30,944 | 28,722 | 91,053 | 86,124
Weighted average number of shares for Basic (in Shares) | 20,053 | 19,999 | 20,038 | 19,982
Common Class A [Member] |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Allocation of net income for Basic | 24,493 | 22,638 | 71,971 | 67,793
Weighted average number of shares for Basic (in Shares) | 15,102 | 14,993 | 15,069 | 14,960
Earnings per share for Basic (in Dollars per share) | $ 1.62 | $ 1.51 | $ 4.78 | $ 4.53
Common Class B [Member] |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Allocation of net income for Basic | 6,127 | 5,647 | 17,962 | 16,880
Weighted average number of shares for Basic (in Shares) | 4,722 | 4,675 | 4,701 | 4,656
Earnings per share for Basic (in Dollars per share) | $ 1.30 | $ 1.21 | $ 3.82 | $ 3.63
Unvested Participating Shares [Member] |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Allocation of net income for Basic | $ 324 | $ 437 | $ 1,120 | $ 1,451
Weighted average number of shares for Basic (in Shares) | 229 | 331 | 268 | 366

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: 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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
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