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Inventories, Net Of Customer Advances (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Inventory, Net [Abstract]    
Cost incurred on long-term contracts in progress $ 836,414 $ 832,642
Raw materials 118,820 119,416
Advances to suppliers and subcontractors 40,116 35,857
Inventory, gross 995,350 987,915
Cost incurred on contracts in progress deducted from customer advances 68,170 68,306
Advances received from customers 95,131 [1] 104,297 [1]
Provision for losses on long-term contracts 76,017 64,065
Inventories, net of customer advances $ 756,032 $ 751,247
[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).