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Commitments and contingencies (Details) - USD ($) $ in Thousands	158 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Site Contingency [Line Items]
Total future payments	$ 82,554
Payments in 2025	20,472
Payments in 2026	21,389
Payments in 2027	20,217
Payments in 2028	20,476
Payments in 2029 - 2033	0
Multiple sites
Site Contingency [Line Items]
Environmental accrual	1,933	$ 1,992
Tegrant Holding Corporation
Site Contingency [Line Items]
Payment towards remediation of sites	2,304
Tegrant Holding Corporation | Spartanburg, South Carolina Site
Site Contingency [Line Items]
Environmental accrual	$ 5,096	$ 5,259

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