Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021
Intangible asset activity
Net balance	$ 27,196
Additions	16
Disposals-Other	(21)
Net foreign currency translation	79
Amortization expense	(1,573)	$ (2,354)
Net balance	25,697
Intangible assets, net
Balance at cost			$ 97,015
Accumulated amortization			(71,318)
Total intangible assets	27,196		25,697
Impairment charges	0	$ 0
Acquired Technology
Intangible asset activity
Net balance	2,277
Additions	2
Net foreign currency translation	17
Amortization expense	(387)
Net balance	1,909
Intangible assets, net
Balance at cost			43,405
Accumulated amortization			(41,496)
Total intangible assets	1,909		1,909
Customer relationships
Intangible asset activity
Net balance	23,200
Net foreign currency translation	66
Amortization expense	(999)
Net balance	22,267
Intangible assets, net
Balance at cost			40,055
Accumulated amortization			(17,788)
Total intangible assets	22,267		22,267
Other
Intangible asset activity
Net balance	1,719
Additions	14
Disposals-Other	(21)
Net foreign currency translation	(4)
Amortization expense	(187)
Net balance	1,521
Intangible assets, net
Balance at cost			13,555
Accumulated amortization			(12,034)
Total intangible assets	$ 1,521		$ 1,521