v3.26.1
Debt - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 27, 2026
Jun. 28, 2025
Jun. 27, 2026
Jun. 28, 2025
Sep. 27, 2025
Debt Instrument [Line Items]          
Interest expense $ 2,000,000.0 $ 1,700,000 $ 5,100,000 $ 5,500,000  
Repayments of debt     129,618,000 $ 0  
Senior Term Loan | Senior Credit Facility          
Debt Instrument [Line Items]          
Long-term line of credit $ 87,500,000   $ 87,500,000   $ 91,300,000
Stated interest rate (as a percent) 5.60%   5.60%   6.10%
Weighted average effective interest rate (as a percent) 5.90%   5.90%   6.60%
Letters of Credit | Line of Credit | Senior Revolving Credit Facility          
Debt Instrument [Line Items]          
Remaining borrowing capacity $ 141,700,000   $ 141,700,000    
Letters of credit, amount outstanding 8,300,000   8,300,000    
Revolving credit facility | Micro Bird Holdings Inc.          
Debt Instrument [Line Items]          
Long-term line of credit 50,000,000.0   50,000,000.0    
Long-term Debt 0   0    
Revolving credit facility | Line of Credit | Senior Revolving Credit Facility          
Debt Instrument [Line Items]          
Letters of credit, amount outstanding $ 0   $ 0