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Segment Reporting (Tables)
3 Months Ended
Mar. 31, 2014
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Schedule Of Financial Information Concerning Reportable Segments
 
For the Three Months Ended
 
March 31,
 
2013
 
2014
 
(Dollars in thousands)
Net sales to external customers:
 
 
 
Industrial Materials
$
208,777

 
$
218,776

Engineered Solutions
44,950

 
62,015

Total net sales
$
253,727

 
$
280,791

Segment operating income:
 
 
 
Industrial Materials
$
16,078

 
$
(9,423
)
Engineered Solutions
(334
)
 
2,354

Total segment operating income (loss)
$
15,744

 
$
(7,069
)
 
 
 
 
Reconciliation of segment operating income to
    income before provision for income taxes
 
 
 
Other expense, net
550

 
794

Interest expense
9,008

 
8,999

Interest income
(64
)
 
(58
)
Income (loss) before provision for income taxes
$
6,250

 
$
(16,804
)