Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate	35.00%
Deferred Tax Assets Valuation Allowance	$ 84,691	$ 58,532
Uncertain Tax Positions [Abstract]
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions		24,600
[DomesticCountryMember]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets Valuation Allowance	84,700	58,500
Valuation Allowance Deferred Tax Asset Change In Amount	(30,329)	(24,604)	2,252
Uncertain Tax Positions [Abstract]
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	29,100		(2,200)
[ForeignCountryMember]
Uncertain Tax Positions [Abstract]
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	$ (3,000)	$ (3,900)	$ 1,300