v3.26.1
Segment Information - Reportable Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 28, 2026
Sep. 27, 2025
Mar. 29, 2025
Segment Reporting Information [Line Items]      
Net revenues $ 722,125   $ 776,006
Adjusted cost of sales 625,968   663,502
Adjusted selling, general and administrative 111,160   113,760
Other segment items (25,698)   (27,437)
Adjusted EBITDA 10,695   26,181
Total Reportable Segment Adjusted EBITDA 10,695   26,181
Depreciation and amortization 29,370   27,295
Interest expense, net 17,203   14,918
Corporate and unallocated costs 4,554   4,312
Net legal and professional expenses and settlements 12,767   11,882
Goodwill impairment 0   137,721
Restructuring and asset-related charges, net 1,979   14,546
M&A related costs, net 7,599   (613)
Net gain on sale of business, property, and equipment     (653)
Loss on extinguishment and refinancing of debt 0   237
Share-based compensation expense 3,682   3,228
Loss, before tax (73,468)   (189,520)
Capital expenditures 26,078   41,954
Segment assets 2,077,268   2,418,915
Operating segments      
Segment Reporting Information [Line Items]      
Net revenues 722,125   776,006
Operating segments | North America      
Segment Reporting Information [Line Items]      
Net revenues 452,713   530,561
Adjusted cost of sales 408,712   465,648
Adjusted selling, general and administrative 58,964   69,499
Other segment items (18,582)   (20,110)
Adjusted EBITDA 3,619   15,524
Depreciation and amortization 18,829   17,325
Goodwill impairment   $ 196,900 137,700
Restructuring and asset-related charges, net 792   10,663
Capital expenditures 15,317   27,736
Segment assets 1,263,792   1,349,336
Operating segments | Europe      
Segment Reporting Information [Line Items]      
Net revenues 269,412   245,445
Adjusted cost of sales 217,256   197,854
Adjusted selling, general and administrative 52,196   44,261
Other segment items (7,116)   (7,327)
Adjusted EBITDA 7,076   10,657
Depreciation and amortization 8,384   7,565
Restructuring and asset-related charges, net 1,154   3,147
Capital expenditures 9,824   10,290
Segment assets 683,981   774,988
Intersegment Eliminations      
Segment Reporting Information [Line Items]      
Net revenues 0   522
Intersegment Eliminations | North America      
Segment Reporting Information [Line Items]      
Net revenues 0   33
Intersegment Eliminations | Europe      
Segment Reporting Information [Line Items]      
Net revenues 0   489
Corporate and reconciling items      
Segment Reporting Information [Line Items]      
Net revenues 722,125   776,528
Corporate and reconciling items | North America      
Segment Reporting Information [Line Items]      
Net revenues 452,713   530,594
Corporate and reconciling items | Europe      
Segment Reporting Information [Line Items]      
Net revenues 269,412   245,934
Corporate and Unallocated Costs      
Segment Reporting Information [Line Items]      
Depreciation and amortization 2,157   2,405
Restructuring and asset-related charges, net 33   736
Other special items 7,009   2,828
Capital expenditures 937   3,928
Segment assets 129,495   $ 294,591
Environmental matter costs $ 3,100