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Shareholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Nov. 30, 2019 | Dec. 01, 2018
Components Of Shareholders Equity [Line Items] |  |
Shares repurchased by the company for associates' tax withholding liability associated with share-based compensation |  | 40
Treasury stock reissued to fund plan, shares | 16 | 13
Class A Common Stock [Member] |  |
Components Of Shareholders Equity [Line Items] |  |
Common stock shares repurchased | 41 | 778
Purchase of treasury stock | $ 3,009 | $ 63,527
Number of shares authorized for repurchase | 1,157 |
Treasury Stock [Member] | Class A Common Stock [Member] |  |
Components Of Shareholders Equity [Line Items] |  |
Purchase of treasury stock | $ 3,009 | $ 3,200

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