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Inventories (Tables)
9 Months Ended
Sep. 30, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories as of September 30, 2015 and December 31, 2014 were as follows:
In thousands
 
September 30,
2015
 
December 31,
2014
Raw materials
 
$
25,324

 
$
21,248

Work in process
 
19,321

 
15,753

Finished goods
 
16,101

 
15,348

 
 
60,746

 
52,349

Less: Progress billings
 
(1,253
)
 
(1,108
)
Total inventories
 
$
59,493

 
$
51,241