Taxes (Details 5) (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]
Beginning Unrecognized Tax Benefits	$ 20,150	$ 19,407
Increases related to current tax positions	2,470	3,852
Decreases related to prior year tax positions	(378)	(35)
Foreign currency translation (decreases) increases to prior year tax positions	58	(34)
Decrease relating to taxing authority settlements	(128)	(83)
Decreases resulting from a lapse of the applicable statue of limitations	(4,392)	(2,957)
Ending Unrecognized Tax Benefits	$ 17,780	$ 20,150