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Valuation And Qualifying Accounts (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Provisions For Losses On Long Term Contracts [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 196,980 [1] $ 136,070 [1] $ 136,341 [1]
Additions (Charged to Costs and Expenses) 32,996 [1] 104,560 [1] 35,443 [1]
Deductions (Write-Offs and Actual Losses Incurred) 100,761 [1] 43,650 [1] 36,360 [1]
Additions Resulting from Acquisitions     646 [1]
Balance at End of Period 129,215 [1] 196,980 [1] 136,070 [1]
Deduction from inventories 64,065 74,509 74,407
Other accrued expenses 65,150 122,471 61,663
Amount related to cessation of program with a foreign customer 18,467 57,189  
Portion of cessation program with a foreign customer included in long-term liabilities 13,300    
Provisions For Claims And Potential Contractual Penalties And Others [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 8,236 6,618 5,864
Additions (Charged to Costs and Expenses) 648 2,160 1,262
Deductions (Write-Offs and Actual Losses Incurred) 2,038 542 1,103
Additions Resulting from Acquisitions     595
Balance at End of Period 6,846 8,236 6,618
Allowance For Doubtful Accounts [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 6,861 11,215 7,885
Additions (Charged to Costs and Expenses) 2,865 56 904
Deductions (Write-Offs and Actual Losses Incurred) 598 4,410 349
Additions Resulting from Acquisitions     2,775
Balance at End of Period 9,128 6,861 11,215
Valuation Allowance On Deferred Taxes [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 1,302 160 [2] 34,776 [2]
Additions (Charged to Costs and Expenses) 3,395 1,302  
Deductions (Write-Offs and Actual Losses Incurred) 1,169 160 34,616 [2]
Balance at End of Period 3,528 1,302 160 [2]
Prior year valuation on allowance deferred taxes adjustment $ 21,500    
[1] * An amount of $74,407, $74,509 and $64,065 as of December 31, 2010, 2011 and 2012, respectively, is presented as a deduction from inventories, and an amount of $61,663, $122,471 and $65,150 as of December 31, 2010, 2011 and 2012, respectively, is presented as part of other accrued expenses in the category of "Cost Provisions and Other." An amount of $57,189 and $18,467 as of December 31, 2011 and 2012, respectively, is presented as other accrued expenses and is related to the cessation of a program with a foreign customer, of which $13,300 was included in long-term liabilities.
[2] An amount of $21,500 was deducted as a result of a prior year adjustment.