Segment Reporting Schedule Of Long-Lived Assets By Reportable Segment (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net property, plant and equipment	[1]	$ 637,533	$ 654,040
Industrial Materials [Member]
Segment Reporting Information [Line Items]
Net property, plant and equipment		571,424	552,155
Engineered Solutions [Member]
Segment Reporting Information [Line Items]
Net property, plant and equipment		$ 66,109	$ 101,885

[1] Long-lived assets represent fixed assets, net of accumulated depreciation.