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Inventories (Tables)
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Components of Inventory
Inventories, net consisted of the following:
 
December 31,
 
2016
 
2015
 
(Amounts in thousands)
Raw materials
$
348,012

 
$
390,998

Work in process
633,352

 
739,227

Finished goods
220,912

 
235,083

Less: Progress billings
(216,396
)
 
(285,582
)
Less: Excess and obsolete reserve
(66,629
)
 
(84,161
)
Inventories, net
$
919,251

 
$
995,565