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Taxes on Income 3 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Computed statutory income tax expense at 35%	$ 125,721	$ 122,387	$ 88,018
Changes in income taxes resulting from:
Earnings from unconsolidated investments related to anticipated receipt of dividends	(27,317)	(26,973)	(20,300)
State income taxes, net of federal income tax benefit	2,296	7,878	4,553
Other	3,080	3,737	(371)
Actual income tax expense from continuing operations	$ 103,780	$ 107,029	$ 71,900

- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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