Income Taxes (Schedule Of Reconciliation Of Total Gross Liability Related To Uncertain Tax Positions) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Balance at January 1	$ 20,949	$ 23,416	$ 77,548
Additions for tax positions related to prior years			5,082
Reductions for tax positions related to prior years	(1,639)	150	(48,054)
Additions for tax positions related to current year	10,802	463	1,495
Settlements			(12,627)
Lapses in statutes of limitations	(323)	(3,080)	(28)
Balance at December 31	$ 29,789	$ 20,949	$ 23,416

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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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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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