Income Taxes (Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits - Opening Balance	$ 19,302	$ 22,590
Gross Increases - tax positions in prior period	33,787	19
Gross decreases - tax positions in prior period	(21)	(8,899)
Gross increases - current-period tax positions	0	5,727
Settlements with taxing authorities	(163)	0
Expiration of the statute of limitations for the assessment of taxes	(251)	(135)
Unrecognized Tax Benefits - Ending Balance	$ 52,654	$ 19,302