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Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Tax benefit in respect of options exercised |  |  | $ (161) |  | $ (169) |
Provisions For Losses On Long Term Contracts |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | 129,215 | [1] | 196,980 | [1] | 136,070 | [1]
Additions (Charged to Costs and Expenses) | 38,928 | [1] | 32,996 | [1] | 104,560 | [1]
Deductions (Write-Offs and Actual Losses Incurred) | 27,884 | [1] | 100,761 | [1] | 43,650 | [1]
Additions Resulting from Acquisitions | 0 | [1] | 0 | [1] | 0 | [1]
Balance at End of Period | 140,259 | [1] | 129,215 | [1] | 196,980 | [1]
Deduction from inventories | 76,017 |  | 64,065 |  | 74,509 |
Other accrued expenses | 64,242 |  | 65,150 |  | 122,471 |
Amount related to cessation of program with a foreign customer | 18,249 |  | 18,467 |  |  |
Portion of cessation program with a foreign customer included in long-term liabilities | 13,300 |  |  |  |  |
Provisions For Claims And Potential Contractual Penalties And Others |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | 6,846 |  | 8,236 |  | 6,618 |
Additions (Charged to Costs and Expenses) | 2,561 |  | 648 |  | 2,160 |
Deductions (Write-Offs and Actual Losses Incurred) | 199 |  | 2,038 |  | 542 |
Additions Resulting from Acquisitions | 0 |  | 0 |  | 0 |
Balance at End of Period | 9,208 |  | 6,846 |  | 8,236 |
Allowance For Doubtful Accounts |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | 9,128 |  | 6,861 |  | 11,215 |
Additions (Charged to Costs and Expenses) | 0 |  | 2,865 |  | 56 |
Deductions (Write-Offs and Actual Losses Incurred) | 2,011 |  | 598 |  | 4,410 |
Additions Resulting from Acquisitions | 0 |  | 0 |  | 0 |
Balance at End of Period | 7,117 |  | 9,128 |  | 6,861 |
Valuation Allowance On Deferred Taxes |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | 4,372 |  | 1,302 | [2] | 160 | [2]
Additions (Charged to Costs and Expenses) | 6,162 |  | 4,240 |  | 1,302 | [2]
Deductions (Write-Offs and Actual Losses Incurred) | 1,176 |  | 1,169 |  | 160 | [2]
Additions Resulting from Acquisitions | 0 |  | 0 |  | 0 | [2]
Balance at End of Period | 9,358 |  | 4,372 |  | 1,302 | [2]
Prior year valuation on allowance deferred taxes adjustment | $ 21,500 |  |  |  |  |
[1] | An amount of $74,509, $64,065 and $76,017 as of December 31, 2011, 2012 and 2013, respectively, is presented as a deduction from inventories, and an amount of $122,471, $65,150 and $64,242 as of December 31, 2011, 2012 and 2013, respectively, is presented as part of other accrued expenses in the category of “Cost Provisions and Other.” An amount of $18,467 and $18,249 as of December 31, 2012 and 2013, 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.

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