Income Taxes (Reconciliation Of 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	$ 4,816	$ 6,556	$ 7,991
Additions as a result of tax positions taken during the current year	462	816	1,400
Additions as a result of tax positions taken during prior years	518	1,322	528
Reductions as a result of tax positions taken during prior years	(791)	(2,046)	(509)
Reductions relating to settlements with taxing authorities		(1,286)	(2,854)
Reductions as a result of lapse of statute of limitations	(569)	(546)
Balance at end of year	$ 4,436	$ 4,816	$ 6,556

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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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