Commitments and Contingencies (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Loss Contingency Accrual At Carrying Value	$ 0.1	$ 0.2
ACP [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	1.0
ACP [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.1
SB Decking [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.5
Houghton Combination [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	5.8	$ 6.6
Houghton Combination [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	6.0
Houghton Combination [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	5.0
Houghton Environmental Matters [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	6.0
Houghton Environmental Matters [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 5.0