Intangible Assets (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite lived intangible assets:
Accumulated amortization	$ (57,420)	$ (51,578)
Total finite lived intangible assets	36,470	42,312
Foreign currency translation adjustment	(2,271)	(2,794)
Total	42,930	48,249
Customer relationship intangibles
Finite lived intangible assets:
Intangible assets, finite	91,523	91,523
Other intangibles, primarily trade name
Finite lived intangible assets:
Intangible assets, finite	2,367	2,367
Trade Names
Intangible Assets
Indefinite lived intangible assets — Trade name	$ 8,731	$ 8,731