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Inventories (Tables)
 3 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Components of Inventories

The components of inventories consisted of the following:

 

 

 

March 31,

 

 

December 31,

 

(in thousands)

 

2016

 

 

2015

 

Raw materials

 

$

16,047

 

 

$

14,383

 

Work in process

 

 

22,468

 

 

 

13,146

 

Inventories

 

$

38,515

 

 

$

27,529