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Segment Reporting (Tables)
 3 Months Ended
Mar. 31, 2017
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Schedule Of Financial Information Concerning Reportable Segments
Information concerning our reportable segment is as follows:
 
For the Three Months Ended March 31, 2016
 
For the Three Months Ended March 31, 2017
 
(Dollars in thousands)
Net sales to external customers:
 
 
 
Industrial Materials
$
95,576

 
$
104,739

 
 
 
 
Operating (loss) income:
 
 
 
Industrial Materials
(20,247
)
 
(6,398
)
Corporate, R&D and Other expenses
(7,173
)
 
(5,029
)
Total operating loss
$
(27,420
)
 
$
(11,427
)
 
 
 
 
Reconciliation of segment operating loss to
    loss before provision for income taxes
 
 
 
Other expense (income), net
$
237

 
$
3,067

Interest expense
6,460

 
7,546

Interest income
(12
)
 
(123
)
Loss from continuing operations before
   provision for income taxes
$
(34,105
)
 
$
(21,917
)