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Goodwill and Intangibles - Schedule of Acquired Intangibles in Accompanying Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 27, 2026 | Mar. 28, 2025 | Mar. 27, 2026 | Mar. 28, 2025
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 717,670 |
Amortization | $ (34,063) | $ (38,040) | (72,059) | $ (76,701)
Foreign currency translation adjustments and other |  |  | (5,597) |
Ending balance | 640,014 |  | 640,014 |
Customer Relationships, Contracts and Backlog |  |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Beginning balance |  |  | 521,275 |
Amortization |  |  | (59,186) |
Foreign currency translation adjustments and other |  |  | (3,916) |
Ending balance | 458,173 |  | 458,173 |
Developed Technology |  |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Beginning balance |  |  | 19,524 |
Amortization |  |  | (5,373) |
Foreign currency translation adjustments and other |  |  | (6) |
Ending balance | 14,145 |  | 14,145 |
Trade Names |  |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Beginning balance |  |  | 176,871 |
Amortization |  |  | (7,500) |
Foreign currency translation adjustments and other |  |  | (1,675) |
Ending balance | $ 167,696 |  | $ 167,696 |

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