Intangible Assets (Details 1) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 20,836	$ 20,628
Accumulated Amortization	(11,998)	(12,265)
Net Carrying Amount	8,838	8,363
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,432	16,330
Accumulated Amortization	(10,610)	(11,140)
Net Carrying Amount	5,822	5,190
Intellectual property and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,404	4,298
Accumulated Amortization	(1,388)	(1,125)
Net Carrying Amount	$ 3,016	$ 3,173