Additional Balance Sheet And Cash Flow Information (Components Of Accumulated Other Comprehensive Loss, Net Of Tax) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Additional Balance Sheet And Cash Flow Information [Abstract]
Unrealized net loss on derivative financial instruments	$ (10,144)	$ 18,219	$ (2,972)
Unrealized net loss on marketable securities	350	460	(133)
Accumulated other comprehensive loss, net of tax	$ (130,945)	$ (110,511)	$ 48,193

Net of tax and reclassification adjustments amount of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges, which is attributable to the parent entity. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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+ Details

- Definition

Net of tax amount of unrealized holding gain (loss) before reclassification adjustments and transfers on available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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+ Details