Contingencies and Other Information - Narrative (Details) $ in Thousands	6 Months Ended	9 Months Ended
	Sep. 30, 2013 USD ($)	Dec. 31, 2020 USD ($) facility	Mar. 18, 2014 USD ($)	Oct. 26, 2007 USD ($)
Loss Contingencies [Line Items]
Number of facilities with an associated asset retirement obligation | facility		1
Other Income (Expense)
Loss Contingencies [Line Items]
Benefit of excise tax	$ 24,142
Tax Assessment | Brazilian State of Parana
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss		$ 9,114		$ 2,535
Tax Assessment | Brazilian State of Santa Catarina
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss		5,915	$ 2,192
Tax Assessment | Brazil State of Rio Grande do Sul and the State of Santa Catarina
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss		9,101
Tax Assessment | IPI Credit Bonus
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss		$ 15,230