Number of Small Tube And Core Plants

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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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Amount of expected cost remaining for the specified restructuring cost.

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The number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s).

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Restructuring and asset impairment - Additional Information (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Jul. 01, 2022 USD ($)	Dec. 31, 2022 USD ($) position	Dec. 31, 2022 USD ($) manufacturing_plant position	Dec. 31, 2021 USD ($) position	Dec. 31, 2020 USD ($)
Disposal Group, Including Discontinued Operations [Line Items]
Future additional charges expected to be recognized		$ 8,400	$ 8,400
Other asset impairments			10,095	$ 5,034	$ 77,851
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
Consumer Packaging
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments			$ 930
Consumer Packaging
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments				2,635
Other Segments
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments				$ 2,399
Industrial Paper Packaging
Disposal Group, Including Discontinued Operations [Line Items]
Number of small tube and core plants \| manufacturing_plant			2
Organizational Effectiveness Efforts
Disposal Group, Including Discontinued Operations [Line Items]
Elimination of positions due to realignment of cost structure (position) \| position		180	180	315
Asset impairments		$ 3,620