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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Aug. 27, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Annual Incentive Compensation [Table Text Block] | The following table shows the amount accrued each fiscal year for stock-based compensation under the annual incentive plan. The Human Resources Committee of the Board of Directors approved the awards of restricted stock to the officers on the dates shown.
| August 27, 2016 |  | August 29, 2015 |  | August 30, 2014
Annual incentive accrual (in thousands) | $ | 1,467 |  |  | $ | 454 |  |  | $ | 2,600 |
Date of award | 10/11/2016 |  |  | 10/13/2015 |  |  | 10/14/2014 |
Stock-based portion of annual incentive accrual (in thousands) | $ | 489 |  |  | $ | 157 |  |  | $ | 866 |
Restricted shares awarded | 17,532 |  |  | 7,914 |  |  | 40,495 |
Shares repurchased for payroll taxes | (8,412 | ) |  | (3,511 | ) |  | (20,638 | )
Restricted shares issued | 9,120 |  |  | 4,403 |  |  | 19,857 |
Schedule of Long-Term Incentive Plans [Table Text Block] | The following table shows the amount accrued each fiscal year for stock-based compensation as a result of ROE targets being met. The Human Resources Committee of the Board of Directors approved the awards of restricted stock to the officers on the dates shown. We repurchase shares from employees who elect to pay their payroll tax via delivery of shares of common stock as opposed to cash.
| August 27, 2016 |  | August 29, 2015 |  | August 30, 2014
LTIP accrual (in thousands) | $ | 318 |  |  | $ | 360 |  |  | $ | 540 |
LTIP plan year | 2014-2016 |  |  | 2013-2015 |  |  | 2012-2014 |
Date of award | 10/11/2016 |  |  | 10/13/2015 |  |  | 10/14/2014 |
Restricted shares awarded | 11,419 |  |  | 18,156 |  |  | 25,529 |
Shares repurchased for payroll taxes | (5,539 | ) |  | (8,529 | ) |  | (13,011 | )
Restricted shares issued | 5,880 |  |  | 9,627 |  |  | 12,518 |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] | Total stock-based compensation expense for the past three fiscal years consisted of the following components:
| Year Ended
(In thousands) | August 27, 2016 |  | August 29, 2015 |  | August 30, 2014
Share awards: |  |  |  |  |
Performance-based annual plan employee award expense | $ | 489 |  |  | $ | 157 |  |  | $ | 866 |
Performance-based LTIP employee award expense | 318 |  |  | 360 |  |  | 540 |
Time-based employee award expense | 1,583 |  |  | 2,060 |  |  | 1,472 |
Time-based directors award expense | 743 |  |  | 412 |  |  | 410 |
Directors stock unit expense | 149 |  |  | 108 |  |  | 98 |
Stock options | 11 |  |  | — |  |  | — |
Total stock-based compensation | $ | 3,293 |  |  | $ | 3,097 |  |  | $ | 3,386 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | A summary of stock option activity for Fiscal 2016, 2015 and 2014 is as follows:
|  | Year Ended
|  | August 27, 2016 |  | August 29, 2015 |  | August 30, 2014
|  | Shares | Price per Share | Wtd. Avg. Exercise Price/Share |  | Shares | Price per Share | Wtd. Avg. Exercise Price/Share |  | Shares | Price per Share | Wtd. Avg. Exercise Price/Share
Outstanding at beginning of year |  | 167,394 |  | $26 - $34 |  | $ | 28.30 |  |  | 457,421 |  | $26 - $36 |  | $ | 30.38 |  |  | 664,994 |  | $26 - $36 |  | $ | 29.83 |
Options granted |  | 10,000 |  | $16 - $17 |  | 16.67 |  |  | — |  | — |  | — |  |  | — |  | — |  | — |
Options exercised |  | — |  | — |  | — |  |  | — |  | — |  | — |  |  | (77,833 | ) | $26 - $27 |  | 26.72 |
Options cancelled |  | (167,394 | ) | $26 - $34 |  | 28.30 |  |  | (290,027 | ) | $26 - $36 |  | 31.58 |  |  | (129,740 | ) | $26 - $35 |  | 29.75 |
Outstanding at end of year |  | 10,000 |  | $16 - $17 |  | $ | 16.67 |  |  | 167,394 |  | $26 - $34 |  | $ | 28.30 |  |  | 457,421 |  | $26 - $36 |  | $ | 30.38 |
Exercisable at end of year |  | — |  | $ | — |  | $ | — |  |  | 167,394 |  | $26 - $34 |  | $ | 28.30 |  |  | 457,421 |  | $26 - $36 |  | $ | 30.38 |
Vested and expected to vest at end of year |  | 10,000 |  | $16 - $17 |  | $ | 16.67 |  |  | 167,394 |  | $26 - $34 |  | $ | 28.30 |  |  | 457,421 |  | $26 - $36 |  | $ | 30.38 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
Valuation Assumptions(1) | Fiscal 2016
Expected dividend yield | 2.40 | %
Risk-free interest rate (2) | 1.49 | %
Expected life (in years) (3) | 5 |
Expected volatility (4) | 43.52 | %
Weighted average fair value of options granted |  | $5.31 |
(1) Forfeitures are estimated based on historical experience. (2) Risk-free interest rate is based on Treasury Securities constant maturity interest rate whose term is consistent with the expected life of our stock options. (3) Expected life of stock options is based on historical experience. (4) Expected stock price volatility is based on historical experience over a term consistent with the expected life of our stock options.
Schedule of Share-based Compensation, Stock Options, Other Values [Table Text Block] | Other values related to options are as follows:
(In thousands) | Fiscal 2016 |  | Fiscal 2015 |  | Fiscal 2014
Aggregate intrinsic value of options exercised (1) | $ | — |  |  | $ | — |  |  | $ | 173 |
Net cash proceeds from the exercise of stock options | — |  |  | — |  |  | 2,080 |
Actual income tax benefit realized from stock option exercises | — |  |  | — |  |  | 63 |
(1) | The amount by which the closing price of our stock on the date of exercise exceeded the exercise price.
Schedule of Nonvested Share Activity [Table Text Block] | A summary of share award activity for Fiscal 2016, 2015 and 2014 is as follows:
| Year Ended
| August 27, 2016 |  | August 29, 2015 |  | August 30, 2014
| Shares | Weighted Average Grant Date Fair Value |  | Shares | Weighted Average Grant Date Fair Value |  | Shares | Weighted Average Grant Date Fair Value
Beginning of year | 163,420 |  | $ | 20.83 |  |  | 198,523 |  | $ | 18.98 |  |  | 190,962 |  | $ | 12.46 |
Granted | 240,270 |  | 19.72 |  |  | 165,624 |  | 21.70 |  |  | 138,345 |  | 27.44 |
Vested | (110,283 | ) | 19.44 |  |  | (198,693 | ) | 19.71 |  |  | (129,817 | ) | 18.82 |
Canceled | (9,526 | ) | 20.28 |  |  | (2,034 | ) | 20.58 |  |  | (967 | ) | 18.44 |
End of year | 283,881 |  | $ | 20.45 |  |  | 163,420 |  | $ | 20.83 |  |  | 198,523 |  | $ | 18.98 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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