v3.26.1
Goodwill and Intangible Assets - Summary of Gross Amount and Accumulated Amortization of Acquired Finite-lived Intangibles (Details) - USD ($)
$ in Thousands
 9 Months Ended
Jun. 28, 2026
Sep. 28, 2025
Intangible Asset, Finite-Lived [Line Items]    
Gross Amount $ 275,471 $ 248,531
Accumulated Amortization (151,881) (127,371)
Net Amount $ 123,590 121,160
Client relations    
Intangible Asset, Finite-Lived [Line Items]    
Weighted- Average Remaining Life (in Years) 6 years 7 months 6 days  
Gross Amount $ 190,376 169,807
Accumulated Amortization (71,507) (56,241)
Net Amount $ 118,869 113,566
Backlog    
Intangible Asset, Finite-Lived [Line Items]    
Weighted- Average Remaining Life (in Years) 7 months 6 days  
Gross Amount $ 50,822 43,919
Accumulated Amortization (46,221) (40,397)
Net Amount $ 4,601 3,522
Trade names    
Intangible Asset, Finite-Lived [Line Items]    
Weighted- Average Remaining Life (in Years) 1 month 6 days  
Gross Amount $ 34,273 34,805
Accumulated Amortization (34,153) (30,733)
Net Amount $ 120 $ 4,072