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Segment Reporting (Schedule Of Financial Information Concerning Reportable Segments) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Segment Reporting Information [Line Items]    
Total net sales $ 280,791 $ 253,727
Total segment operating income (loss) (7,069) 15,744
Other expense (income), net 794 550
Interest expense 8,999 9,008
Interest income (58) (64)
Income before provision for income taxes (16,804) 6,250
Industrial Materials [Member]
   
Segment Reporting Information [Line Items]    
Total net sales 218,776 208,777
Total segment operating income (loss) (9,423) 16,078
Engineered Solutions [Member]
   
Segment Reporting Information [Line Items]    
Total net sales 62,015 44,950
Total segment operating income (loss) $ 2,354 $ (334)