v3.26.1
Segment Reporting - Schedule of Reconciliation of Other Segment to Consolidated Totals (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2026
Jun. 29, 2025
Jun. 28, 2026
Jun. 29, 2025
Segment Reporting [Line Items]        
Equity in earnings of affiliates, net of tax $ 2,263 $ 2,270 $ 2,953 $ 4,191
Continuing Operations        
Segment Reporting [Line Items]        
Equity in earnings of affiliates, net of tax 2,263 2,270 2,953 4,191
Depreciation and amortization 131,096 129,475 256,125 251,278
Operating Segments        
Segment Reporting [Line Items]        
Equity in earnings of affiliates, net of tax 2,263 2,270 2,953 4,191
Depreciation and amortization 85,526 83,512 166,235 161,624
Operating Segments | Consumer Packaging        
Segment Reporting [Line Items]        
Equity in earnings of affiliates, net of tax 276 170 274 119
Depreciation and amortization 54,675 52,801 105,625 101,756
Operating Segments | Industrial Paper Packaging        
Segment Reporting [Line Items]        
Equity in earnings of affiliates, net of tax 1,987 2,100 2,679 4,072
Depreciation and amortization 30,851 30,711 60,610 59,868
All Other        
Segment Reporting [Line Items]        
Equity in earnings of affiliates, net of tax 0 0 0 0
Depreciation and amortization $ 45,570 $ 45,963 $ 89,890 $ 89,654