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Note 12 - Share-based Compensation (Tables) | 12 Months Ended
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Aug. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Compensation Expense For All Share-Based Compensation For Five Fiscal Years [Table Text Block] |
|  | Share-Based Awards |  |  | Restricted Stock |  |  | Total |
2014 |  | $ | 1,360 |  |  | $ | 2,725 |  |  | $ | 4,085 |
2015 |  |  | 1,048 |  |  |  | 1,697 |  |  |  | 2,745 |
2016 |  |  | 754 |  |  |  | 680 |  |  |  | 1,434 |
2017 |  |  | 482 |  |  |  | — |  |  |  | 482 |
2018 |  |  | 75 |  |  |  | — |  |  |  | 75 |
Total |  | $ | 3,719 |  |  | $ | 5,102 |  |  | $ | 8,821 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding, August 25, 2012 |  |  | 560,270 |  |  | $ | 41.74 |
Granted |  |  | 127,870 |  |  |  | 70.08 |
Exercised |  |  | (97,600 | ) |  |  | 38.39 |
Forfeited |  |  | (6,000 | ) |  |  | 44.80 |
Outstanding, August 31, 2013 |  |  | 584,540 |  |  | $ | 48.47 |
Exercisable, August 31, 2013 |  |  | 100,340 |  |  | $ | 44.78 |

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- Definition Compensation Expense For All Share-Based Compensation For Five Fiscal Years [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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