Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Finite lived intangible assets
Accumulated amortization	$ (27,860)	$ (19,797)
Total	70,077	75,174
Foreign currency translation adjustment	1,314	562
Total	80,475	84,820
Customer relationship intangibles [Member]
Finite lived intangible assets
Customer relationship intangibles	95,683	92,888
Other intangible assets [Member]
Finite lived intangible assets
Customer relationship intangibles	$ 2,254	$ 2,083