Commitments and Contingencies - Narrative (Details) $ in Thousands, R$ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 BRL (R$)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual At Carrying Value	$ 300			$ 300		$ 100
Interest Income Other					$ 100
Income Tax Expense (Benefit)	795	$ 2,245		26,702	$ (7,603)
ACP [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	1,000			1,000
ACP [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	100			100
SB Decking [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	400			400
Houghton Combination [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	5,700			5,700		$ 6,000
Houghton environmental matters [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	6,500			6,500
Houghton environmental matters [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	5,500			5,500
Foreign Consumption Tax [Member]
Loss Contingencies [Line Items]
(Reversal) of previously recorded liability of best estimate of indirect tax owed	(1,800)
(Reversal) of indemnification receivable	(1,100)
Brazilian Indirect Taxes [Member]
Loss Contingencies [Line Items]
Gain (Loss) Related To Litigation Settlement			R$ 67	13,300
Interest Income Other				4,900
Income Tax Expense (Benefit)				(8,400)
Insurance claim [Member]
Loss Contingencies [Line Items]
Gain (Loss) Related To Litigation Settlement				1,000
Proceeds from Insurance Settlement, Operating Activities				1,700
Insurance Settlements Receivable	$ 2,000			$ 2,000