Income Taxes (Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Balance at January 1	$ 115,293	$ 132,211	$ 120,124
Increases related to prior year tax positions	453	1,220	339
Decreases related to prior year tax positions	(27)	(24,745)	(1,933)
Decrease as a result of statute expirations	(61,021)	(1,629)	(1,886)
Decrease as a result of tax settlements	(8,184)	(7,606)	(5,207)
Increases related to current year tax positions	29,566	15,842	20,774
Balance at December 31	$ 76,080	$ 115,293	$ 132,211

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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 increases 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 lapses of the applicable statutes of limitations.

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