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Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Prior year valuation on allowance deferred taxes adjustment | $ 21,500 |  |  |  |  |
Provisions For Losses On Long Term Contracts [Member] |  |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period | 136,070 | [1] | 136,341 | [1] | 99,323 | [1]
Additions (Charged to Costs and Expenses) | 104,560 | [1] | 35,443 | [1] | 67,725 | [1]
Deductions (Write-Offs and Actual Losses Incurred) | 43,650 | [1] | 36,360 | [1] | 30,707 | [1]
Additions Resulting from Acquisitions |  |  | 646 | [1] |  |
Balance at End of Period | 196,980 | [1] | 136,070 | [1] | 136,341 | [1]
Deduction from inventories | 74,509 |  | 74,407 |  | 60,848 |
Other accrued expenses | 122,471 |  | 61,663 |  | 75,493 |
Amount related to cessation of program with a foreign customer | 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 | 6,618 |  | 5,864 |  | 3,025 |
Additions (Charged to Costs and Expenses) | 2,160 |  | 1,262 |  | 4,928 |
Deductions (Write-Offs and Actual Losses Incurred) | 542 |  | 1,103 |  | 2,109 |
Additions Resulting from Acquisitions |  |  | 595 |  |  |
Balance at End of Period | 8,236 |  | 6,618 |  | 5,864 |
Allowance For Doubtful Accounts [Member] |  |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period | 11,215 |  | 7,885 |  | 5,471 |
Additions (Charged to Costs and Expenses) | 56 |  | 904 |  | 2,726 |
Deductions (Write-Offs and Actual Losses Incurred) | 4,410 |  | 349 |  | 312 |
Additions Resulting from Acquisitions |  |  | 2,775 |  |  |
Balance at End of Period | 6,861 |  | 11,215 |  | 7,885 |
Valuation Allowance On Deferred Taxes [Member] |  |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period | 160 | [2] | 34,776 | [2] | 36,282 |
Additions (Charged to Costs and Expenses) | 1,302 |  |  |  |  |
Deductions (Write-Offs and Actual Losses Incurred) | 160 |  | 34,616 | [2] | 1,506 |
Balance at End of Period | $ 1,302 |  | $ 160 | [2] | $ 34,776 | [2]
[1] | An amount of $60,848, $74,407 and $74,509 as of December 31, 2009, 2010 and 2011, respectively, is presented as a deduction from inventories, and an amount of $75,493, $61,663 and $122,471 as of December 31, 2009, 2010 and 2011, respectively, is presented as part of other accrued expenses in the category of "Cost Provisions and Other." The 2011 amount of other accrued expenses includes $57,189 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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