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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% |  |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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