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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On October 10, 2022, Grundartangi borrowed €13.6 million on the Iceland Term Facility. As previously disclosed, our wholly owned subsidiary, Mt. Holly Commerce Park LLC, entered into a binding agreement on August 3, 2022, subject to ordinary course conditions, to sell approximately 133 acres of land. This agreement was terminated on October 28, 2022.