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Inventories (Tables)
 12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Components of Inventory
Inventories, net consisted of the following:
 
December 31,
 
2015
 
2014
 
(Amounts in thousands)
Raw materials
$
390,998

 
$
352,928

Work in process
739,227

 
687,343

Finished goods
235,083

 
265,439

Less: Progress billings
(285,582
)
 
(230,058
)
Less: Excess and obsolete reserve
(84,161
)
 
(80,088
)
Inventories, net
$
995,565

 
$
995,564