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Property, Plant and Equipment, Net (Tables)
 12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Components of property, plant and equipment
The components of our property, plant and equipment are summarized below (in thousands):
 
 
 
As of December 31,
 
 
 
2013
  
2012
 
Property, plant and equipment:
 
  
 
Building
 
$
30,369
  
$
28,089
 
Machinery and equipment
  
40,764
   
37,334
 
Leasehold improvements
  
4,493
   
3,578
 
Construction in progress
  
2,879
   
3,946
 
 
  
78,505
   
72,947
 
Less: accumulated depreciation and amortization
  
(40,884
)
  
(35,712
)
 
 
$
37,621
  
$
37,235