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Restructuring and asset impairment - Additional Information (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 01, 2022 USD ($) | Dec. 31, 2023 USD ($) employee | Dec. 31, 2022 USD ($) manufacturing_plant position | Dec. 31, 2021 USD ($)
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Asset impairment loss/(gain) |  | $ 26,445 | $ 21,444 | $ (4,082)
Future additional charges expected to be recognized |  | 2,300 |  |
Other asset impairments |  | $ 0 | 10,095 | $ 5,034
Impact of new accounting pronouncements |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Other asset impairments | $ 3,747 |  |  |
All Other |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Other asset impairments |  |  | $ 9,165 |
Industrial Paper Packaging |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Number of small tube and core plants | manufacturing_plant |  |  | 2 |
Consumer Packaging |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Other asset impairments |  |  | $ 930 |
Organizational Effectiveness Efforts |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Elimination of positions due to realignment of cost structure (position) |  | 300 | 180 |
Asset impairment loss/(gain) |  |  | $ 3,620 |

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