Taxes (Schedule of Gross Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	$ 31,150	$ 8,798	$ 4,418
Increases Resulting from Current Period Tax Positions	1,199	409	1,626
Increases Resulting from Prior Period Tax Positions	688	21,943	2,754
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(1,248)
Ending Balance	$ 31,789	$ 31,150	$ 8,798