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Segment Reporting (Schedule Of Financial Information Concerning Reportable Segments) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]      
Net sales $ 1,166,674 $ 1,248,264 $ 1,320,184
Total segment operating income (loss) (2,570) 156,468 166,009
Equity in earnings of and gain recorded on acquisition of non-consolidated affiliate 0 0 0
Other (income) expense, net 1,698 (1,005) 4,835
Interest expense 36,037 23,247 18,307
Interest income (203) (261) (424)
Income before income taxes (40,102) 134,487 143,291
Industrial Materials [Member]
      
Segment Reporting Information [Line Items]      
Net sales 909,448 1,025,571 1,132,194
Total segment operating income (loss) (22,452) 143,268 158,547
Engineered Solutions [Member]
      
Segment Reporting Information [Line Items]      
Net sales 257,226 222,693 187,990
Total segment operating income (loss) $ 19,882 $ 13,200 $ 7,462