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Goodwill and other intangible assets - Additional Information (Details) - USD ($)
 12 Months Ended
Sep. 08, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Oct. 01, 2023
Goodwill [Line Items]          
Goodwill, impairment loss   $ 0      
Goodwill   1,810,654,000 $ 1,675,311,000    
Aggregate amortization expenses   87,264,000 $ 80,445,000 $ 49,419,000  
Amortization expense on other intangible assets in 2024   88,200,000      
Amortization expense on other intangible assets in 2025   79,200,000      
Amortization expense on other intangible assets in 2026   75,300,000      
Amortization expense on other intangible assets in 2027   73,900,000      
Amortization expense on other intangible assets in 2028   73,100,000      
Inapel, RTS Packaging and Chattanooga Mill          
Goodwill [Line Items]          
Other intangible assets $ 199,217,000        
Weighted average useful life 14 years 9 months 18 days        
RTS Packaging and Chattanooga Mill          
Goodwill [Line Items]          
Goodwill $ 92,657,000 107,566,000      
Other intangible assets $ 199,560,000 190,565,000      
Inapel          
Goodwill [Line Items]          
Goodwill   15,704,000      
Other intangible assets   8,653,000      
Plastics - Medical reporting unit          
Goodwill [Line Items]          
Excess of fair value of reporting unit over carrying value (percent)         29.90%
Goodwill   $ 64,212,000      
Discount Rate | Plastics - Medical reporting unit          
Goodwill [Line Items]          
Discount rate (percent)         12.00%
Change necessary in order for estimated fair value to fall below carrying value (percent)   14.50%