Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
ACP [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Minimum	$ 0.2
Loss Contingency, Range of Possible Loss, Maximum	0.9
Loss Contingency Accrual At Carrying Value	$ 0.2	$ 0.3
P-2 Well Operation Range Estimate	nine months to thirty three months
SB Decking [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 3.0
Loss Contingency, Settlement Agreement, Terms	In response, two of the three carriers entered into separate settlement and release agreements with the subsidiary in 2005 and 2007 for $15.0 million and $20.0 million, respectively. The proceeds of both settlements are restricted and can only be used to pay claims and costs of defense associated with the subsidiary’s asbestos litigation. In 2007, the subsidiary and the remaining primary insurance carrier entered into a Claim Handling and Funding Agreement, under which the carrier is paying 27% of defense and indemnity costs incurred by or on behalf of the subsidiary in connection with asbestos bodily injury claims. The agreement continues until terminated and can only be terminated by either party by providing a minimum of two years prior written notice. As of March 31, 2016, no notice of termination has been given under this agreement. At the end of the term of the agreement, the subsidiary may choose to again pursue its claim against this insurer regarding the application of the policy limits.
VAT Total [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Minimum	$ 0.0
Loss Contingency, Range of Possible Loss, Maximum	$ 1.0