Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Intangible asset activity
Net balance	$ 36,209
Additions	13
Net foreign currency translation	(816)
Amortization expense	(2,354)	$ (2,348)
Net balance	33,052
Intangible assets, net
Balance at cost			$ 94,231
Accumulated amortization			(61,179)
Ending Balance	33,052		33,052
Impairment charges	0	$ 0
Acquired Technology
Intangible asset activity
Net balance	5,454
Net foreign currency translation	(203)
Amortization expense	(860)
Net balance	4,391
Intangible assets, net
Balance at cost			41,794
Accumulated amortization			(37,403)
Ending Balance	4,391		4,391
Customer relationships
Intangible asset activity
Net balance	26,884
Net foreign currency translation	(607)
Amortization expense	(906)
Net balance	25,371
Intangible assets, net
Balance at cost			38,736
Accumulated amortization			(13,365)
Ending Balance	25,371		25,371
Other
Intangible asset activity
Net balance	3,871
Additions	13
Net foreign currency translation	(6)
Amortization expense	(588)
Net balance	3,290
Intangible assets, net
Balance at cost			13,701
Accumulated amortization			(10,411)
Ending Balance	$ 3,290		$ 3,290