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Taxes On Income (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Corporate tax rates	24.00%	25.00%	26.00%
Tax rate in 2011	24.00%
Tax rate in 2012	23.00%
Tax rate in 2013	22.00%
Tax rate in 2014	21.00%
Tax rate in 2015	20.00%
Tax rate in 2016 and thereafter	18.00%
Corporate tax and capital gains rate for 2012 and thereafter	25.00%
Minimum percentage of income from exports	25.00%
Tax-exempt profits earned by the company's "Approved Enterprises" and "Privileged Enterprises	$ 529,129
Income tax liability	132,282
Withholding tax rate	15.00%
Liability for unrecognized tax benefits	53,183	48,791	33,348
Accrued interest and penalties	5,916	4,588
Reduction in other income taxes liabilities	4,684	1,508	6,300
Taxes on income	0	800
Available carry forward tax losses	89,323
Available carry forward tax losses non-Israeli subsidiaries	$ 26,066
Development Area A [Member]
Tax rate in 2011	10.00%
Tax rate in 2012	10.00%
Tax rate in 2013	7.00%
Tax rate in 2014	7.00%
Tax rate in 2015	6.00%
Other Regions [Member]
Tax rate in 2011	15.00%
Tax rate in 2012	15.00%
Tax rate in 2013	12.50%
Tax rate in 2014	12.50%
Tax rate in 2015	12.00%

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.

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The tax effect as of the balance sheet date of the amount of excess of tax deductions over gross income in a year which cannot be used on the tax return of a country outside the country of domicile in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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