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Fair Value Measurements (Schedule Of Income Tax Benefit (Expense)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Fair Value Measurements [Abstract]
Foreign currency translation adjustments	$ 884	$ 0	$ (1,350)	$ 0
Unrealized holding gain (loss) on marketable securities	6,588	(12,643)	(429)	(13,772)
Unrealized holding gain (loss) on cash flow derivatives	(8,480)	835	(13,600)	(7,129)
Income tax benefit	$ (1,008)	$ (11,808)	$ (15,379)	$ (20,901)

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Tax effect of the adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity that is attributable to the parent entity.

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Tax effect of the change in accumulated other comprehensive income (loss), that is, the tax effect on items included in other comprehensive income (loss) during the period.

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