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Summary of significant accounting policies - Additional Information (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |
Carrying value of equity investments | $ 54,356 | $ 51,938 |
Accounts payable for supply chain financing | 46,832 | 38,900 |
Research and development costs | $ 24,100 | $ 22,000 | $ 23,300
Percentage of LIFO inventory (percent) | 15.00% | 15.00% |
LIFO inventory amount | $ 22,900 | $ 20,371 |
Number of reportable segments (segment) | segment | 2 |  |
Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Intangible assets, useful life | 3 years |  |
Minimum | Equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment, useful life | 3 years |  |
Minimum | Buildings |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment, useful life | 15 years |  |
Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Intangible assets, useful life | 40 years |  |
Maximum | Equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment, useful life | 11 years |  |
Maximum | Buildings |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment, useful life | 40 years |  |
Net sales | Customer concentration | Largest customer |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer concentrations (percent) | 4.00% | 4.00% | 5.00%
Net sales | Customer concentration | Second largest customer |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer concentrations (percent) | 3.00% | 4.00% | 4.00%
Net sales | Customer concentration | Customers that sponsor/promote multi-vendor supply chain finance arrangements | Multi-Vendor Supply Chain Finance Arrangement |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer concentrations (percent) | 10.00% | 11.00% |
Receivables | Customer concentration | Largest customer |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer concentrations (percent) | 3.00% | 3.00% |
Chilean tube |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage ownership of investments accounted for under the cost method (percent) | 19.50% |  |
Finland Small Recycling Business |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage ownership of investments accounted for under the cost method (percent) | 12.20% |  |

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