Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Raw materials and spare parts	$ 34,931	$ 31,302
Total inventory	$ 34,931	$ 31,302

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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