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Revenue - Major Customers (Details) - Net Sales - Customer concentration	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Petroleum | Two Customers
Major Customers and Suppliers
Concentration risk		26.00%	25.00%
Petroleum | One customer
Major Customers and Suppliers
Concentration risk	16.00%
Nitrogen Fertilizer | Two Customers
Major Customers and Suppliers
Concentration risk		26.00%	28.00%
Nitrogen Fertilizer | One customer
Major Customers and Suppliers
Concentration risk	13.00%

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