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Inventories, Net Of Customer Advances (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Inventories, Net Of Customer Advances [Abstract]    
Cost incurred on long-term contracts in progress $ 832,642 $ 866,325
Raw materials 119,416 110,528
Advances to suppliers and subcontractors 35,857 47,168
Inventory, gross 987,915 1,024,021
Less - Cost incurred on contracts in progress deducted from customer advances 68,306 38,048
Less - Advances deducted from inventories 104,297 [1] 150,195 [1]
Less - Provision for losses on long-term contracts 64,065 74,509
Inventories, net of customer advances $ 751,247 $ 761,269
[1] The Company has transferred legal title of inventories to certain customers as collateral for advances received. Advances are allocated to the relevant inventories on a per-project basis. In cases where advances are in excess of the inventories, the net amount is presented in customer advances (See Note 14).