Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Summary of Intangible assets
Gross Assets	$ 67,631	$ 55,671
Accumulated Amortization	(40,610)	(36,439)
Intangible Assets, Net	27,021	19,232
Customer lists acquired
Summary of Intangible assets
Gross Assets	28,973	28,123
Accumulated Amortization	(22,412)	(20,859)
Intangible Assets, Net	6,561	7,264
Technology and patents
Summary of Intangible assets
Gross Assets	35,112	24,358
Accumulated Amortization	(16,148)	(14,222)
Intangible Assets, Net	18,964	10,136
Trade names and trademarks
Summary of Intangible assets
Gross Assets	3,546	3,190
Accumulated Amortization	(2,050)	(1,358)
Intangible Assets, Net	$ 1,496	$ 1,832