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Other long-term liabilities - Changes in Environmental Remediation Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Accrual for Environmental Loss Contingencies [Roll Forward]
Opening balance	$ 55,224	$ 69,383
Remediation activities	(5,243)	(9,865)
Accretion	2,167	1,025
Changes in cash flow estimates	1,344	2,265
Revision in assumptions	(11,035)	(7,584)
Closing balance	$ 42,457	$ 55,224

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- Definition

Accrual for Environmental Loss Contingencies, Accretion

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- Definition

Accrual for Environmental Loss Contingencies, Increase (Decrease) for Revision in Assumptions

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- Definition

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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

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-Publisher FASB
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Reference 5: http://www.xbrl.org/2003/role/recommendedDisclosureRef
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Amount of expense (reversal of expense) which increases (decreases) the accrual for environmental loss contingencies from revisions in estimates to existing obligations. Excludes changes related to business acquisitions, divestitures, or currency movement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 450
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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