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Stock-Based Compensation Plans (Narrative) (Details) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 14, 2015 USD ($) employees $ / shares shares | Oct. 15, 2014 USD ($) shares | Oct. 15, 2013 USD ($) shares | Aug. 27, 2016 USD ($) | Aug. 29, 2015 USD ($) plans shares | Aug. 30, 2014 USD ($) | Aug. 31, 2013 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  | $ 3,097,000 | $ 3,386,000 | $ 3,009,000
Repurchased shares, value |  |  |  |  | 6,519,000 | 26,340,000 | 12,718,000
Aggregate intrinsic value of awards outstanding |  |  |  |  | $ 3,300,000 |  |
Weighted average remaining contractual life for outstanding options |  |  |  |  | 1 month 28 days |  |
Weighted average remaining contractual life for exercisable options |  |  |  |  | 1 month 28 days |  |
Unrecognized compensation expense related to restricted stock awards |  |  |  |  | $ 1,200,000 |  |
Unrecognized compensation expense, period of recognition |  |  |  |  | 1 year 7 months 10 days |  |
Total fair value of awards vested |  |  |  |  | $ 4,200,000 | 3,600,000 | 1,100,000
Performance-Based Long-Term Plan Employee Award [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  | $ 360,000 | $ 540,000 | $ 444,000
Annual Incentive Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Annual incentive plan, portion paid in cash |  |  |  |  | 0.667 | 0.667 | 0.667
Annual incentive plan, portion paid in restricted stock |  |  |  |  | 0.333 | 0.333 | 0.333
Stock-based compensation expense |  |  |  |  | $ 454,000 | $ 2,600,000 | $ 3,000,000
Annual Incentive Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | shares |  | 40,495 | 38,139 |  |  |  |
Repurchased shares | shares |  | 20,638 | 19,436 |  |  |  |
Long Term Incentive Plans [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  | $ 360,000 | 540,000 | 444,000
Long Term Incentive Plans [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Term of award |  |  |  |  | 3 years |  |
Shares granted | shares |  | 25,529 | 16,006 |  |  |  |
Shares granted, value |  | $ 545,000 | $ 443,000 |  |  |  |
Repurchased shares | shares |  | 13,011 | 7,875 |  |  |  |
Number of plans established | plans |  |  |  |  | 3 |  |
Term of sale restriction period after grant |  |  |  |  | 1 year |  |
Repurchased shares, value |  | $ 278,000 | $ 218,000 |  |  |  |
2014 Incentive Compensation Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares authorized | shares |  |  |  |  | 3,600,000 |  |
2014 Incentive Compensation Plan [Member] | Awards Excluding Stock Options and Stock Appreciation Rights [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares authorized | shares |  |  |  |  | 3,600,000 |  |
2014 Incentive Compensation Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Term of award |  |  |  |  | 10 years |  |
2014 Incentive Compensation Plan [Member] | Non-time-based Awards [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  |  | 3 years |  |
2014 Incentive Compensation Plan [Member] | Non-time-based Awards [Member] | Minimum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  |  | 1 year |  |
2014 Incentive Compensation Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Requisite service period |  |  |  |  | 3 years |  |
Directors [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Issuance of stock to directors (in shares) | shares |  |  |  |  | 2,907 |  |
Aggregate intrinsic value of awards outstanding |  |  |  |  | $ 2,000,000 |  |
Aggregate intrinsic value of awards outstanding (in shares) | shares |  |  |  |  | 96,611 |  |
Directors [Member] | 2004 Incentive Compensation Plans [Member] | Stock Options [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  |  | 6 months |  |
Key Management [Member] | 2014 Incentive Compensation Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  |  | 3 years |  |
Vesting initiation period from grant date |  |  |  |  | 1 year |  |
Share-based Payments [Member] | Annual Incentive Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  | $ 157,000 | $ 866,000 | $ 1,000,000
Subsequent Event [Member] | Annual Incentive Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | shares | 7,914 |  |  |  |  |  |
Repurchased shares | shares | 3,511 |  |  |  |  |  |
Subsequent Event [Member] | Long Term Incentive Plans [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | shares | 18,156 |  |  |  |  |  |
Shares granted, value | $ 360,000 |  |  |  |  |  |
Repurchased shares | shares | 8,529 |  |  |  |  |  |
Repurchased shares, value | $ 169,000 |  |  |  |  |  |
Subsequent Event [Member] | 2014 Incentive Compensation Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Closing price of common stock on grant date | $ / shares | $ 19.85 |  |  |  |  |  |
Subsequent Event [Member] | Key Management [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of Key Management employees | employees | 60 |  |  |  |  |  |
Subsequent Event [Member] | Key Management [Member] | 2014 Incentive Compensation Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | shares | 162,200 |  |  |  |  |  |
Shares granted, value | $ 3,200,000 |  |  |  |  |  |
Subsequent Event [Member] | Non-Management Board Members [Member] | 2014 Incentive Compensation Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | shares | 42,000 |  |  |  |  |  |
Shares granted, value | $ 834,000 |  |  |  |  |  |
Subsequent Event [Member] | Forecasted stock-based comp expense [Member] | 2014 Incentive Compensation Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 1,500,000 |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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