Income Taxes (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]
Gross unrecognized tax benefits at beginning of year	$ 48,963	$ 52,837	$ 59,129
Increases related to prior year tax positions		13	209
Decreases related to prior year tax positions	(286)	(2,323)	(649)
Increases related to current year tax positions	85	385	1,085
Decreases related to current year tax positions			(715)
Settlements with taxing authorities	(38,543)	(1,414)	(6,222)
Lapse of applicable statute of limitations	(7,507)	(535)
Gross unrecognized tax benefits at end of year	$ 2,712	$ 48,963	$ 52,837

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

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