Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Intangible asset activity
Net balance	$ 37,888
Additions-Acquisition	16,100
Additions-Other	143
Impairment	(478)
Net foreign currency translation	(204)
Amortization expense	(6,909)
Net balance	46,540
Intangible assets, net
Balance at cost		$ 94,103
Accumulated amortization		(47,563)
Ending Balance	37,888	46,540
Impairment charges	500
Acquired Technology
Intangible asset activity
Net balance	6,946
Additions-Acquisition	5,900
Net foreign currency translation	(68)
Amortization expense	(3,017)
Net balance	9,761
Intangible assets, net
Balance at cost		42,735
Accumulated amortization		(32,974)
Ending Balance	6,946	9,761
Customer Relationships
Intangible asset activity
Net balance	22,544
Additions-Acquisition	10,000
Net foreign currency translation	(241)
Amortization expense	(2,294)
Net balance	30,009
Intangible assets, net
Balance at cost		37,718
Accumulated amortization		(7,709)
Ending Balance	22,544	30,009
Other
Intangible asset activity
Net balance	8,398
Additions-Acquisition	200
Additions-Other	143
Impairment	(478)
Net foreign currency translation	105
Amortization expense	(1,598)
Net balance	6,770
Intangible assets, net
Balance at cost		13,650
Accumulated amortization		(6,880)
Ending Balance	$ 8,398	$ 6,770