Income Taxes Rollforward of Gross Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits	$ 55,127	$ 0	$ 0
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	602	0	0
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(790)	0	0
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	29,465	55,127	0
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	0	0
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	0	0	0
Unrecognized Tax Benefits, Increases Resulting from Foreign Currency Translation	1,077	0	0
Unrecognized Tax Benefits	$ 85,481	$ 55,127	$ 0