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Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands |  | 9 Months Ended
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Dec. 01, 2018 | Aug. 31, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Reclassification of net unrealized gains from accumulated other comprehensive income (loss) |  | $ (1,955)
Accounting Standards Update 2016-01 | Reclassification out of Accumulated Other Comprehensive Income |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Reclassification of net unrealized gains from accumulated other comprehensive income (loss) | $ (1,955) |

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