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Stock-based Compensation - Additional Information (Details) $ / shares in Units, shares in Thousands | 3 Months Ended
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Dec. 31, 2020 USD ($) shares / unit $ / shares shares | Dec. 28, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Common Stock Issuable per Restricted Stock Unit | shares / unit | 1 |
ESPP maximum contribution percentage | 10.00% |
ESPP maximum contribution amount by employee | $ 25,000 |
ESPP purchase price as a % of stock price | 85.00% |
Stock-based compensation | $ 46,088,000 | $ 27,936,000
ESPP |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-based compensation | $ 1,900,000 | $ 1,500,000
TSR Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted, shares | shares | 90 |
Vesting period | 3 years |
Weighted average fair value per share | $ / shares | $ 124.04 |
Catch-Up Provision | TSR Units | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted, shares | shares | 179 |
Percentage of number of RSUs | 100.00% |
Catch-Up Provision | Maximum Two Times | TSR Units | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of RSUs | two times |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued 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://fasb.org/us-gaap/role/ref/legacyRef -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=120381028&loc=d3e5070-113901 + Details
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