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Segment Reporting Schedule Of Long-Lived Assets By Reportable Segment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]    
Net property, plant and equipment $ 833,907 [1] $ 776,884 [1]
Industrial Materials [Member]
   
Segment Reporting Information [Line Items]    
Net property, plant and equipment 685,243 649,389
Engineered Solutions [Member]
   
Segment Reporting Information [Line Items]    
Net property, plant and equipment $ 148,664 $ 127,495
[1] Long-lived assets represent fixed assets, net of accumulated depreciation.