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Note 7 - Net Income Per Share (Tables) | 6 Months Ended
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Feb. 25, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block] |
|  | Thirteen weeks ended |  |  | Twenty-six weeks ended |
|  | February 25, |  |  | February 27, |  |  | February 25, |  |  | February 27, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Net income available to shareholders |  | $ | 22,516 |  |  | $ | 23,498 |  |  | $ | 50,730 |  |  | $ | 59,388 |
Allocation of net income for Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  | $ | 17,836 |  |  | $ | 18,691 |  |  | $ | 40,178 |  |  | $ | 47,232 |
Class B Common Stock |  |  | 4,518 |  |  |  | 4,704 |  |  |  | 10,184 |  |  |  | 11,896 |
Unvested participating shares |  |  | 162 |  |  |  | 103 |  |  |  | 368 |  |  |  | 260 |
|  | $ | 22,516 |  |  | $ | 23,498 |  |  | $ | 50,730 |  |  | $ | 59,388 |
Weighted average number of shares for Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  |  | 15,305 |  |  |  | 15,241 |  |  |  | 15,295 |  |  |  | 15,230 |
Class B Common Stock |  |  | 4,846 |  |  |  | 4,795 |  |  |  | 4,846 |  |  |  | 4,795 |
Unvested participating shares |  |  | 139 |  |  |  | 96 |  |  |  | 140 |  |  |  | 95 |
|  |  | 20,290 |  |  |  | 20,132 |  |  |  | 20,281 |  |  |  | 20,120 |
Earnings per share for Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  | $ | 1.17 |  |  | $ | 1.23 |  |  | $ | 2.63 |  |  | $ | 3.10 |
Class B Common Stock |  | $ | 0.93 |  |  | $ | 0.98 |  |  | $ | 2.10 |  |  | $ | 2.48 |
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] |
|  | Thirteen weeks ended February 25, 2017 |  |  | T wenty-six weeks ended February 25, 2017 |
|  | Earnings |  |  |  |  |  |  |  |  |  |  | Earnings |  |  |  |  |  |  |  |  |
|  | to Common |  |  | Common |  |  |  |  |  |  | to Common |  |  | Common |  |  |  |  |
|  | shareholders |  |  | Shares |  |  | EPS |  |  | shareholders |  |  | Shares |  |  | EPS |
As reported - Basic |  | $ | 17,836 |  |  |  | 15,305 |  |  | $ | 1.17 |  |  | $ | 40,178 |  |  |  | 15,295 |  |  | $ | 2.63 |
Add: effect of dilutive potential common shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Awards |  |  | — |  |  |  | 112 |  |  |  |  |  |  |  | — |  |  |  | 109 |  |  |  |  |
Class B Common Stock |  |  | 4,518 |  |  |  | 4,846 |  |  |  |  |  |  |  | 10,184 |  |  |  | 4,846 |  |  |  |  |
Add: Undistributed earnings allocated to unvested participating shares |  |  | 158 |  |  |  | — |  |  |  |  |  |  |  | 357 |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |  |  |  |  |
Less: Undistributed earnings reallocated to unvested participating shares |  |  | (150 | ) |  |  | — |  |  |  |  |  |  |  | (338 | ) |  |  | — |  |  |  |  |
Diluted EPS – Common Stock |  | $ | 22,362 |  |  |  | 20,263 |  |  | $ | 1.10 |  |  | $ | 50,381 |  |  |  | 20,250 |  |  | $ | 2.49 |
|  | Thirteen weeks |  |  | Twenty-six weeks |
|  | ended February 27, 2016 |  |  | ended February 27, 2016 |
|  | Earnings |  |  |  |  |  |  |  |  |  |  | Earnings |  |  |  |  |  |  |  |  |
|  | to Common |  |  | Common |  |  |  |  |  |  | to Common |  |  | Common |  |  |  |  |
|  | Shareholders |  |  | Shares |  |  | EPS |  |  | Shareholders |  |  | Shares |  |  | EPS |
As reported - Basic |  | $ | 18,691 |  |  |  | 15,241 |  |  | $ | 1.23 |  |  | $ | 47,232 |  |  |  | 15,230 |  |  | $ | 3.10 |
Add: effect of dilutive potential common shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based awards |  |  | — |  |  |  | 102 |  |  |  |  |  |  |  | — |  |  |  | 102 |  |  |  |  |
Class B Common Stock |  |  | 4,704 |  |  |  | 4,795 |  |  |  |  |  |  |  | 11,896 |  |  |  | 4,795 |  |  |  |  |
Add: Undistributed earnings allocated to unvested participating shares |  |  | 100 |  |  |  | — |  |  |  |  |  |  |  | 253 |  |  |  | — |  |  |  |  |
Less: Undistributed earnings reallocated to unvested participating shares |  |  | (94 | ) |  |  | — |  |  |  |  |  |  |  | (240 | ) |  |  | — |  |  |  |  |
Diluted EPS – Common Stock |  | $ | 23,401 |  |  |  | 20,138 |  |  | $ | 1.16 |  |  | $ | 59,141 |  |  |  | 20,127 |  |  | $ | 2.94 |

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