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Revenue from Contracts with customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [line Items]
Net sales	$ 366,245	$ 304,397
By-products and other
Disaggregation of Revenue [line Items]
Net sales	15,714	11,577
Long-term Contract with Customer
Disaggregation of Revenue [line Items]
Net sales	242,481	245,565
Short-term Contract with Customer
Disaggregation of Revenue [line Items]
Net sales	$ 108,050	$ 47,255

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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