Restructuring - Costs by Segment (Details) - USD ($) $ in Thousands	12 Months Ended		15 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	$ 10,980	$ 49,518	$ 60,500
Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	801	687
Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	167	0
Allowances for doubtful accounts
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	1,186	11,947
Inventory obsolescence
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	2,746
Fixed asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	11,871
Definite-lived intangible asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	10,896
Other asset write-offs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	1,880	5,013
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	6,946	6,358
Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	10,980	27,284
Infrastructure Solutions | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	801	687
Infrastructure Solutions | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	167	0
Infrastructure Solutions | Allowances for doubtful accounts
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	1,186	11,947
Infrastructure Solutions | Inventory obsolescence
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	2,746
Infrastructure Solutions | Fixed asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	533
Infrastructure Solutions | Definite-lived intangible asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	0
Infrastructure Solutions | Other asset write-offs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	1,880	5,013
Infrastructure Solutions | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	6,946	6,358
Corrosion Protection
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	22,234
Corrosion Protection | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	0
Corrosion Protection | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	0
Corrosion Protection | Allowances for doubtful accounts
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	0
Corrosion Protection | Inventory obsolescence
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	0
Corrosion Protection | Fixed asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	11,338
Corrosion Protection | Definite-lived intangible asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	10,896
Corrosion Protection | Other asset write-offs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	0	0
Corrosion Protection | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, incurred	$ 0	$ 0