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Segment Reporting (Tables)
 9 Months Ended
Sep. 30, 2013
Segment Reporting [Abstract]  
Net Revenues by Segment
 
Three Months Ended
 
Nine Months Ended
Net Revenues by Segment
September 30,
 
September 30,
(in thousands)
2013
 
2012
 
2013
 
2012
Net Revenues:
 
 
 
 
 
 
 
Standard Products
$
56,185

 
$
60,753

 
$
171,469

 
$
180,756

Other Products
1,984

 
2,175

 
5,604

 
7,022

Total net revenues
$
58,169

 
$
62,928

 
$
177,073

 
$
187,778

As a Percentage of Total Net Revenues:
 
 
 
 
 
 
 
Standard Products
97
%
 
97
%
 
97
%
 
96
%
Other Products
3

 
3

 
3

 
4

Total net revenues
100
%
 
100
%
 
100
%
 
100
%