Taxes On Income (Schedule Of Effective Income Tax Reconciliation) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Taxes On Income [Abstract]
Income before taxes as reported in the statements of income	$ 683,214	$ 564,393	$ 445,798
Statutory tax rate in Israel	24.00%	25.00%	26.00%
Effect of "Approved and Privileged Enterprise" status	(6.00%)	(8.00%)	(13.00%)
Foreign exchange			1.00%
Stock based compensation - nondeductible expense		1.00%	1.00%
Others, net	2.00%	2.00%	5.00%
Effective tax rate	20.00%	20.00%	20.00%
Basic earnings per share amounts of the benefit resulting from the "Approved and Privileged Enterprise" status	$ 0.21	$ 0.20	$ 0.27
Diluted earnings per share amounts of the benefit resulting from the "Approved and Privileged Enterprise" status	$ 0.20	$ 0.20	$ 0.27

Basic Earnings Per Shares Amount Resulting From Issuance Of Status

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Diluted Earnings Per Shares Amount Resulting From Issuance Of Status

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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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 portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit that is attributable to changes in the income tax laws or rates.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to differences in the deductibility or nondeductibility of incentive stock options and other equity-based compensation costs in accordance with generally accepted accounting principles and enacted tax laws.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the repatriation of foreign earnings under enacted tax laws.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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