Inventories (Tables)
 3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
Net Components of Inventory
Inventories, net consisted of the following:
 
March 31,
 
  December 31,  
(Amounts in thousands)
2015
 
2014
Raw materials
$
427,937

 
$
352,928

Work in process
748,713

 
687,343

Finished goods
265,807

 
265,439

Less: Progress billings
(245,418
)
 
(230,058
)
Less: Excess and obsolete reserve
(78,099
)
 
(80,088
)
Inventories, net
$
1,118,940

 
$
995,564