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Income Taxes (Schedule Of Activity Related To Gross Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Balance at beginning of year	$ 22,290	$ 49,416	$ 47,562
Increases related to prior year tax positions	44	948
Decreases related to prior year tax positions		(9,569)	(1,051)
Increases related to current year tax positions	2,541	2,334	5,867
Decreases related to current year tax positions	(7,203)	(19,035)
Settlements	13	(500)	(2,191)
Decreases related to lapse of statutes of limitations	(1,520)	(1,304)	(771)
Balance at end of year	$ 16,165	$ 22,290	$ 49,416

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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