Restructuring - Additional Information (Details) $ in Thousands	3 Months Ended						12 Months Ended			15 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2015 USD ($) position	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Estimated Annual Savings										$ 10,800
Total headcount reduction | position							86
Restructuring charges	$ 300	$ 1,500	$ 5,700	$ 3,500	$ 9,500	$ 40,000	$ 968	$ 687	$ 0
Restructuring charges, incurred							10,980	49,518		60,500
Restructuring Costs, After Tax Results										44,900
Non-Cash Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	48,600						48,600			48,600
Cash Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	11,900						11,900			11,900
Corrosion Protection
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Estimated Annual Savings										2,400
Restructuring charges, incurred							0	22,234
Corrosion Protection | Non-Cash Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	22,200						22,200			22,200
Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Estimated Annual Savings										8,400
Restructuring charges, incurred							10,980	$ 27,284
Infrastructure Solutions | Non-Cash Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 26,400						$ 26,400			$ 26,400