Revenue - Summary of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Change in Contract with Customer, Liability [Roll Forward]
Deferred revenue, beginning balance	$ 156,135	$ 145,344
Deferral of revenue	149,253	215,188
Recognition of deferred revenue	(187,069)	(200,061)
Foreign currency translation	620	(4,336)
Deferred revenue, ending balance	$ 118,939	$ 156,135