Commitments and Contingencies - Narrative (Details) $ in Thousands, R$ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 BRL (R$)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual At Carrying Value	$ 100			$ 100		$ 100
Interest Income Other					$ 100
Income Tax Expense (Benefit)	15,218	$ 3,222		25,907	$ (9,848)
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	6,000			6,000		$ 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]
Loss Contingency Accrual At Carrying Value	1,800			1,800
Other Assets Miscellaneous Current	1,100			1,100
Income Tax Reconciliation Tax Settlements Foreign				11,000
Foreign Consumption Tax [Member] | Houghton [Member]
Loss Contingencies [Line Items]
Indemnification assets	22,000			22,000
Foreign Consumption Tax [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	40,000			40,000
Foreign Consumption Tax [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 0			0
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)