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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Aug. 29, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Stock-Based Compensation Expense | Total stock-based compensation expense for the past three fiscal years consisted of the following components:
(in thousands) | 2020 |  | 2019 |  | 2018
Share awards: |  |  |  |  |
Time-based | $ | 4,287 |  |  | $ | 4,986 |  |  | $ | 4,152 |
Performance-based | 796 |  |  | 716 |  |  | 2,525 |
Stock options | 990 |  |  | 925 |  |  | 502 |
Other(1) | 402 |  |  | 431 |  |  | 255 |
Total stock-based compensation expense | $ | 6,475 |  |  | $ | 7,058 |  |  | $ | 7,434 |
(1) Includes stock-based compensation expense related to Board of Directors stock award expense and ESPP expense. Directors may elect to defer all or part of their annual retainer into a deferred compensation plan. The plan allows them to defer into either money units or stock units.
Summary of Nonvested Time-Based Share Awards | A summary of the status of nonvested time-based share awards at August 29, 2020, and changes during Fiscal 2020, is as follows:
| Shares |  | Weighted Average Fair Value
Outstanding at August 31, 2019 | 215,506 |  |  | $ | 33.40 |
Granted | 166,440 |  |  | $ | 42.76 |
Vested | (77,550) |  |  | $ | 34.45 |
Forfeited/canceled | (2,132) |  |  | $ | 36.08 |
Outstanding at August 29, 2020 | 302,264 |  |  | $ | 38.27 |
Summary of Nonvested Performance-Based Awards | A summary of the status of the Company's nonvested performance-based share awards at August 29, 2020, and changes during Fiscal 2020, is as follows:
| Shares |  | Weighted Average Fair Value
Outstanding at August 31, 2019 | 207,433 |  |  | $ | 33.87 |
Granted | 64,914 |  |  | $ | 47.93 |
Vested | (65,302) |  |  | $ | 28.21 |
Forfeited/canceled | (18,053) |  |  | $ | 32.79 |
Outstanding at August 29, 2020 | 188,992 |  |  | $ | 40.73 |
Summary of Stock Option Activity | A summary of stock option activity for Fiscal 2020 is as follows:
| Stock Options |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands)
Outstanding at August 31, 2019 | 253,145 |  |  | $ | 34.43 |  |  |  |  |
Granted | 55,036 |  |  | $ | 47.93 |  |  |  |  |
Exercised | (9,718) |  |  | $ | 34.21 |  |  |  |  |
Forfeited/canceled | (6,019) |  |  | $ | 35.09 |  |  |  |  |
Outstanding at August 29, 2020 | 292,444 |  |  | $ | 36.96 |  |  | 7.7 |  | $ | 6,273 |
Vested and expected to vest at August 29, 2020 | 292,444 |  |  | $ | 36.96 |  |  | 7.7 |  | $ | 6,273 |
Exercisable at August 29, 2020 | 142,754 |  |  | $ | 34.20 |  |  | 6.9 |  | $ | 3,455 |
Fair Value of Stock Options Using Black-Scholes Option-Pricing Model Assumptions | The fair value of each stock option is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
Valuation Assumptions(1) | 2020 |  | 2019 |  | 2018
Expected dividend yield | 0.9 | % |  | 1.3 | % |  | 0.9 | %
Risk-free interest rate(2) | 1.7 | % |  | 3.0 | % |  | 2.0 | %
Expected life of stock options (in years)(3) | 5 |  | 5 |  | 5
Expected stock price volatility(4) | 41.2 | % |  | 39.1 | % |  | 38.1 | %
Weighted average fair value of options granted | $ | 17.18 |  |  | $ | 11.09 |  |  | $ | 14.78 |
(1) Forfeitures are recorded when they occur. (2) Based on U.S. Treasury constant maturity interest rate whose term is consistent with the expected life of the stock options. (3) Estimated based on historical experience. (4) Based on historical experience over a term consistent with the expected life of the stock options.

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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