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Income taxes - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Taxes [Line Items] |  |  |  |
Loss carryforwards |  | $ 22,873 |  |
Loss carryforwards not subject to expiration |  | 205,054 |  |
Tax Act, provisional amount related to transition tax | $ 80,580 |  |  |
Transition tax installment period | 8 years |  |  |
Tax Act, provisional amount remaining to installment payments |  | 44,929 |  |
Tax Act, transition tax payable, non-current |  | 1,366 |  |
Increase (decrease) in reserve for uncertain tax positions |  | 567 | $ 5,665 | $ 5,546
Tax credits |  | 14,077 | 21,936 | 13,529
Tax credit offsetting GILTI tax |  | 1,245 | 7,872 |
Global intangible low-taxed income (GILTI) |  | 2,851 | 11,323 | 15,795
Net GILTI tax |  | 1,606 | 3,451 |
Tax cuts and jobs act, global intangible low-tax income, net tax expense (benefit) amount |  | 6,563 |  |
Tax Act, benefits included in valuation allowance |  | 13,182 |  |
Undistributed earnings |  | 955,833 |  |
Unrecognized tax benefits |  | 17,821 | 17,425 |
Accrued for interest |  | 859 | 875 |
Interest benefit |  | 16 | 501 |
Interest expense |  | 485 |  |
Reserve for uncertain tax benefits |  | 470 |  |
U.S. Federal |  |  |  |
Income Taxes [Line Items] |  |  |  |
Loss carryforwards |  | 64,646 |  |
U.S. Federal | Plastic Packaging Inc. |  |  |  |
Income Taxes [Line Items] |  |  |  |
Loss carryforwards |  | 14,493 |  |
Foreign |  |  |  |
Income Taxes [Line Items] |  |  |  |
Loss carryforwards |  | 321,473 |  |
Foreign | Next five years |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards subject to expiration |  | 22,860 |  |
Foreign | 2025 to 2039 |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards subject to expiration |  | 93,559 |  |
State |  |  |  |
Income Taxes [Line Items] |  |  |  |
Loss carryforwards |  | 9,662 |  |
State credit carry forwards |  | 16,871 |  |
Uncertain Items Arising During Year |  |  |  |
Income Taxes [Line Items] |  |  |  |
Increase (decrease) in reserve for uncertain tax positions |  | 2,051 | 2,330 | 1,866
Uncertain Items Arising During Prior Years |  |  |  |
Income Taxes [Line Items] |  |  |  |
Increase (decrease) in reserve for uncertain tax positions |  | $ (1,484) | $ 3,743 | $ (2,601)

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