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Inventories
9 Months Ended
Sep. 30, 2014
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories in the accompanying Condensed Consolidated Balance Sheets consisted of the following amounts (in thousands):
 
 
September 30,
2014
 
December 31,
2013
Raw materials and construction materials
$
35,618

 
$
32,795

Work in process
31,555

 
19,328

 
$
67,173

 
$
52,123